UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

o

Rule 13d-1(c)

x

Rule 13d-1(d)

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Millennium Fund L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Associates Millennium L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Millennium GP LLC

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR 2006 Fund L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Associates 2006 L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR 2006 GP LLC

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
OPERF Co-Investment L.L.C.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR PEI Investments, L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Guernsey

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR PEI Associates, L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Guernsey

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR PEI GP Limited

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Guernsey

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
Kohlberg Kravis Roberts & Co. L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR & Co. LLC

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Partners III, L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR III GP L.L.C.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
8 North America Investor L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Cayman Islands

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR Associates 8 NA L.P.

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Cayman Islands

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

1.

Name of Reporting Person
KKR 8 NA Limited

2.

Check the Appropriate Box if a Member of a Group

(a)

o

(b)

x

3.

SEC Use Only

4.

Citizenship or Place of Organization
Cayman Islands

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
-0-

6.

Shared Voting Power
91,845,692*

7.

Sole Dispositive Power
-0-

8.

Shared Dispositive Power
91,845,692*

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
91,845,692*

10.

Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
97.3%*

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 404119109

Item 1.

(a)

Name of Issuer:
HCA Inc.

(b)

Address of Issuer’s Principal Executive Offices:
One Park Plaza
Nashville, Tennessee 37203

Item 2.

(a)

Name of Person Filing:
KKR Millennium Fund L.P.
KKR Associates Millennium L.P.
KKR Millennium GP LLC
KKR 2006 Fund L.P.
KKR Associates 2006 L.P.
KKR 2006 GP LLC
OPERF Co-Investment L.L.C.
KKR PEI Investments, L.P.
KKR PEI Associates, L.P.
KKR PEI GP Limited
Kohlberg Kravis Roberts & Co. L.P.
KKR & Co. L.L.C.
KKR Partners III, L.P.
KKR III GP L.L.C.
8 North America Investor L.P.
KKR Associates 8 NA L.P.

CUSIP No. 404119109

KKR 8 NA Limited

(b)

Address of Principal Business Office, or, if none, Residence:
c/o Kohlberg Kravis Roberts & Co.
9 West 57th Street, Suite 4200
New York, NY 10019

(c)

Citizenship:
See Item 4 of each cover page.

(d)

Title of Class of Securities:
Common stock, $0.01 par value per share.

(e)

CUSIP Number:
404119109

Item 3.

Not applicable.

Item 4.

Ownership.

(a)

Amount beneficially owned:   

Hercules Holding II, LLC holds 91,845,692 Shares, or 97.3%, of the common stock of the Issuer based on 94,367,464 outstanding Shares as of December 31, 2008.  The units of Hercules Holding II, LLC are held by a private investor group, including affiliates of each of Bain Capital Investors, LLC, Kohlberg Kravis Roberts & Co. L.P. and Merrill Lynch Global Private Equity and affiliates of Dr. Thomas F. Frist, Jr, the founder of the Issuer, all of whom are parties to the limited liability company agreement of Hercules Holding II, LLC.  On January 1, 2009, Merrill Lynch & Co., Inc., the parent of Merrill Lynch Global Private Equity, was acquired by Bank of America Corporation.  Prior to the acquisition of Merrill Lynch & Co., Inc. by Bank of America Corporation, affiliates of Bank of America Corporation also held certain units of Hercules Holding II, LLC and were parties to the limited liability company agreement of Hercules Holding II, LLC.

Each member of the investment group and its affiliates may be deemed to be a member of a group exercising voting and investment control over the Shares held by Hercules Holding II, LLC.  However, each such person disclaims membership in any such group and disclaims beneficial ownership of such Shares.  Affiliates each of Bain Capital Investors, LLC, Kohlberg Kravis Roberts & Co. L.P. and Merrill Lynch Global Private Equity have the right under Hercules Holding II, LLC’s limited liability company

CUSIP No. 404119109

agreement to nominate up to three directors of the Issuer, and affiliates of Dr. Thomas F. Frist, Jr. collectively have the right to nominate up to two directors of the Issuer.

KKR Millennium Fund L.P. (“Millennium Fund”) directly owns 9,313,725, or 10.1%, of the units of Hercules Holding II, LLC.  As the sole general partner of the Millennium Fund, KKR Associates Millennium L.P. may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by the Millennium Fund.  As the sole general partner of KKR Associates Millennium L.P., KKR Millennium GP LLC also may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by the Millennium Fund.  The Millennium Fund, KKR Associates Millennium L.P. and KKR Millennium GP LLC disclaim beneficial ownership of such Shares.  KKR Millennium GP LLC is a limited liability company, the managing members of which are Messrs. Henry R. Kravis and George R. Roberts, and the other members of which are James H. Greene, Jr., Paul E. Raether, Michael W. Michelson, Perry Golkin, Johannes P. Huth, Todd A. Fisher, Alexander Navab, Marc S. Lipschultz, Reinhard Gorenflos, Jacques Garaïalde, Michael M. Calbert, Scott C. Nuttall and William J. Janetschek.  Mr. Michelson is a member of the board of directors of the Issuer. Each such individual may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by KKR Millennium GP LLC but disclaims beneficial ownership of such Shares.

KKR 2006 Fund L.P. (the “2006 Fund”) directly owns 8,642,157, or 9.4%, of the units of Hercules Holding II, LLC.  OPERF Co-Investment LLC (“OPERF Co-Investment”) directly owns 196,078, or 0.2%, of the units of Hercules Holding II, LLC.  As the sole general partner of the 2006 Fund and as the sole general manager of OPERF Co-Investment, KKR Associates 2006 L.P. may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by the 2006 Fund and by OPERF Co-Investment.  As the sole general partner of KKR Associates 2006 L.P., KKR 2006 GP LLC may also be deemed to share voting and dispositive power with respect to any Shares beneficially owned by the 2006 Fund and by OPERF Co-Investment.  The 2006 Fund, OPERF Co-Investment, KKR Associates 2006 L.P. and KKR 2006 GP LLC disclaim beneficial ownership of such Shares.  KKR 2006 GP LLC is a limited liability company, the managing members of which are Messrs. Henry R. Kravis and George R. Roberts, and the other members of which are Michael W. Michelson, Perry Golkin, Johannes P. Huth, Todd A. Fisher, Alexander Navab, Marc S. Lipschultz, Reinhard Gorenflos, Scott C. Nuttall, Joseph Y. Bae, Brian F. Carroll, John K. Saer, Jr. and William J. Janetschek.  Each such individual may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by KKR 2006 GP LLC but disclaims beneficial ownership of such Shares.

At the time of the filing of the Original Schedule 13G, KKR PEI Investments, L.P. (“PEI Investments”) directly owned 4,901,961, or 5.3%, of the units of Hercules Holding II, LLC.  After giving effect to the initial transfer described in the sixth and seventh paragraphs below, PEI Investments directly owns 3,867,647.229, or 4.2%, of the units of Hercules Holding II, LLC.  As the sole general partner of PEI Investments, KKR PEI Associates, L.P. may be deemed to share voting and dispositive power with respect to

CUSIP No. 404119109

any Shares beneficially owned by PEI Investments.  As the sole general partner of KKR PEI Associates, L.P., KKR PEI GP Limited may also be deemed to share voting and dispositive power with respect to any Shares beneficially owned by PEI Investments.  PEI Investments, KKR PEI Associates, L.P. and KKR PEI GP Limited disclaim beneficial ownership of such Shares.  Kohlberg Kravis Roberts & Co. L.P., pursuant to a services agreement with KKR PEI GP Limited, may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by PEI Investments.  KKR & Co. L.L.C. is the general partner of Kohlberg Kravis Roberts & Co. L.P.  Kohlberg Kravis Roberts & Co. L.P. and KKR & Co. L.L.C. disclaim beneficial ownership of such Shares.  The managing members of KKR & Co. L.L.C. are Henry R. Kravis and George R. Roberts.  The other members of KKR & Co. L.L.C. include certain individuals named in this Item 4(a) and other executives of Kohlberg Kravis Roberts & Co. L.P.  Messrs. Kravis and Roberts, as managing members of KKR & Co. L.L.C., may be deemed to share beneficial ownership of any Shares beneficially owned by KKR & Co. L.L.C. but disclaim beneficial ownership of such Shares.  The other members of KKR & Co. L.L.C. also disclaim beneficial ownership of any Shares beneficially owned by KKR & Co. L.L.C.

KKR Partners III, L.P. (“Partners III”) directly owns 319,411, or 0.3%, of the units of Hercules Holding II, LLC.  As the sole general partner of Partners III, KKR III GP LLC may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by Partners III.  Partners III and KKR III GP LLC disclaim beneficial ownership of such Shares.  KKR III GP LLC is a limited liability company, the managing members of which are Henry R. Kravis and George R. Roberts. The other members of KKR III GP LLC include certain individuals named in this Item 4(a) and other executives of Kohlberg Kravis Roberts & Co. L.P.  Messrs. Kravis and Roberts, as managing members of KKR III GP LLC, may be deemed to share voting and dispositive power with respect to any Shares beneficially owned by KKR III GP LLC but disclaim beneficial ownership of such shares.  The other members of KKR III GP LLC disclaim beneficial ownership of any Shares beneficially owned by KKR III GP LLC.

On March 13, 2009, PEI Investments agreed to transfer a portion of its co-investments in five portfolio companies, including a portion of its units of Hercules Holding II, LLC, to 8 North America Investor L.P. for an aggregate purchase price of $200,399,888 (pro rated equally among the five co-investments).  PEI Investments agreed to transfer a number of its co-investment interests in these five companies with an aggregate fair value of $211,000,000 (pro rated equally among the five co-investments).  PEI Investments agreed to transfer initially a number of its co-investment interests in these five portfolio companies (pro rated equally among the five co-investments) with an aggregate fair value of $211,000,000 based on their fair values as of December 31, 2008, which is the nearest date in respect of which such fair values have been determined. After the determination of the aggregate fair value as of March 31, 2009 (which is the next date in respect of which such fair values will be determined) of the five co-investment interests initially transferred to 8 North America Investor L.P., then (i) if such aggregate fair value as of March 31, 2009 is less than $211,000,000, PEI Investments would be required to transfer to 8 North America Investor L.P. additional co-investment interests in the five companies

CUSIP No. 404119109

(pro rated equally among the five co-investments) or (ii) if such aggregate fair value as of March 31, 2009 is greater than $211,000,000, 8 North America Investor L.P. would be required to transfer back to PEI Investments a portion of the co-investment interests in the five companies initially transferred to 8 North America Investor L.P. (pro rated equally among the five co-investments), in each case, such that 8 North America Investor L.P. then holds co-investment interests with an aggregate fair value equal to $211,000,000 (based on their fair values as of March 31, 2009), provided that the number of additional interests transferred to 8 North America Investor L.P. or the number of interests transferred back to PEI Investments will not exceed $50,100,000 in the aggregate based on the fair value of these interests as of March 31, 2009.  The number of units of Hercules Holding II, LLC to be transferred initially to 8 North America Investor L.P. is 1,034,313.771, subject to adjustment as described above.

After giving effect to the initial transfer described in the preceding paragraph and before any adjustment, 8 North America Investor L.P. directly owns 1,034,313.771, or 1.1%, of the units of Hercules Holding II, LLC and therefore may be deemed to own indirectly the same number of Shares of the Issuer by virtue of its membership in Hercules Holding II, LLC.  As the sole general partner of 8 North America Investor L.P., KKR Associates 8 NA L.P. may be deemed to share voting and dispositive power with respect to the Shares beneficially owned by 8 North America Investor L.P.  As the sole general partner of KKR Associates 8 NA L.P., KKR 8 NA Limited may be deemed to share voting and dispositive power with respect to the Shares beneficially owned by 8 North America Investor L.P.  KKR Associates 8 NA L.P. and KKR 8 NA Limited disclaim beneficial ownership of such Shares except to the extent of their pecuniary interest therein. KKR 8 NA Limited is an exempt limited company, the directors of which are Henry R. Kravis, George R. Roberts, Paul E. Raether, Michael W. Michelson, Michael Calbert, Johannes P. Huth, Todd A. Fisher, Alexander Navab, Marc S. Lipschultz, Scott C. Nuttall, Joseph Y. Bae, and William J. Janetschek. Each of such individuals may be deemed to share voting and dispositive power with respect to any shares beneficially owned by KKR 8 NA Limited but disclaim beneficial ownership of such shares, except to the extent of his pecuniary interest therein.

The address of the principal business office of each individual named above who is an affiliate of Kohlberg Kravis Roberts & Co. L.P. is c/o Kohlberg Kravis Roberts & Co., 9 West 57th Street, Suite 4200, New York, NY, 10019.  Each such individual who is an affiliate of Kohlberg Kravis Roberts & Co. L.P. is a citizen of the United States, except for Johannes P. Huth and Reinhard Gorenflos, who are citizens of Germany, and Jacques Garaïalde, who is a citizen of France.

(b)

Percent of class:   

See Item 11 of each cover page, which is based upon Item 6 of each cover page.  See also Item 4(a) above.

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

See Item 5 of each cover page.

CUSIP No. 404119109

(ii)

Shared power to vote or to direct the vote    

See Item 6 of each cover page.

(iii)

Sole power to dispose or to direct the disposition of   

See Item 7 of each cover page.

(iv)

Shared power to dispose or to direct the disposition of   

See Item 8 of each cover page.

Item 5.

Ownership of Five Percent or Less of a Class.

Not applicable.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person.

See Item 4 above.

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not applicable.

Item 8.

Identification and Classification of Members of the Group.

As stated in Item 4 above, Hercules Holding II, LLC holds 91,845,692 shares, or 97.3%, of the Shares of the Issuer.  Hercules Holding II, LLC is held by a private investor group, including affiliates of each of Bain Capital Investors, LLC, Kohlberg Kravis Roberts & Co. L.P. and Merrill Lynch Global Private Equity and by affiliates of Dr. Thomas F. Frist, Jr., the founder of the Issuer.  On January 1, 2009, Merrill Lynch & Co., Inc., the parent of Merrill Lynch Global Private Equity, was acquired by Bank of America Corporation.  Prior to the acquisition of Merrill Lynch & Co., Inc. by Bank of America Corporation, affiliates of Bank of America Corporation also held certain units of Hercules Holding II, LLC and were parties to the limited liability company agreement of Hercules Holding II, LLC.  Each such person may be deemed to be a member of a group exercising voting and investment control over the Shares held by Hercules Holding II, LLC.  However, each such person disclaims membership in any such group and disclaims beneficial ownership of the Shares reported on this Schedule 13G.  The table below sets forth the persons that may be deemed to be a member of such group, based solely on information received from such persons:

CUSIP No. 404119109

Affiliates of Bain Capital
Investors, LLC

Affiliates of Merrill Lynch
Global Private Equity

Affiliates of Dr. Thomas F.
Frist, Jr.

BCIP TCV, LLC

Bank of America Corporation

Dr. Thomas F. Frist, Jr.

Bain Capital Integral Investors 2006, LLC

Merrill Lynch & Co., Inc.

Thomas F. Frist, III

Bain Capital Hercules Investors, LLC

Merrill Lynch Group, Inc.

Patricia C. Frist

Merrill Lynch GP Inc.

Patricia F. Elcan

ML Global Private Equity Partners, L.P.

Frisco, Inc.

MLGPE Ltd

Frisco Partners

ML Global Private Equity Fund, L.P.

William R. Frist

ML HCA Co-Invest, Ltd.

ML HCA Co-Invest, LP

Merrill Lynch Ventures, LLC

Merrill Lynch Ventures L.P. 2001

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certifications.

Not applicable.

CUSIP No. 404119109

KKR MILLENNIUM FUND L.P.

By:

KKR Associates Millennium L.P., general partner

By:

KKR Millennium GP LLC, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR ASSOCIATES MILLENNIUM L.P.

By:

KKR Millennium GP LLC, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR MILLENNIUM GP LLC

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR 2006 FUND L.P.

By:

KKR Associates 2006 L.P., general partner

By:

KKR 2006 GP LLC, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

CUSIP No. 404119109

KKR ASSOCIATES 2006 L.P.

By:

KKR 2006 GP LLC, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR 2006 GP LLC

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

OPERF CO-INVESTMENT L.L.C.

By:

KKR Associates 2006 L.P., general partner

By:

KKR 2006 GP LLC, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR PEI INVESTMENTS, L.P.

By:

KKR PEI Associates L.P., general partner

By:

KKR PEI GP Limited, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

CUSIP No. 404119109

KKR PEI ASSOCIATES L.P.

By:

KKR PEI GP Limited, general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

KKR PEI GP LIMITED

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

KOHLBERG KRAVIS ROBERTS & CO. L.P.

By:

KKR & Co. L.L.C., general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

KKR PARTNERS III, L.P.

By:

KKR III GP L.L.C., general partner

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

KKR III GP L.L.C.

By:

/s/ William Janetschek

Name: William Janetschek
Title: Attorney-in-fact for Henry R. Kravis,
Managing Member

CUSIP No. 404119109

8 NORTH AMERICA INVESTOR L.P.

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

KKR ASSOCIATES 8 NA L.P.

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

KKR 8 NA LIMITED

By:

/s/ William Janetschek

Name: William Janetschek
Title: Director

CUSIP No. 404119109

Exhibit
Number

Title

1

Joint Filing Agreement among 8 North America Investor L.P., KKR Associates 8 NA L.P. and KKR 8 NA Limited.

2

Power of Attorney of 8 North America Investor L.P., KKR Associates 8 NA L.P. and KKR 8 NA Limited (incorporated by reference to Exhibit 24.1 to the Form 3 filed by 8 North America Investor L.P. with respect to HCA Inc. on March 23, 2009).

3

Joint Filing Agreement among each Reporting Person other than 8 North America Investor L.P., KKR Associates 8 NA L.P. and KKR 8 NA Limited (incorporated by reference to Exhibit 1 to the Form 13G filed by KKR Millennium Fund, L.P. with respect to HCA Inc. on February 17, 2009).

4

Power of Attorney of each Reporting Person other than 8 North America Investor L.P., KKR Associates 8 NA L.P. and KKR 8 NA Limited (incorporated by reference to Exhibit 24.1 to the Form 3 filed by KKR Millennium Fund, L.P. with respect to HCA Inc. on April 29, 2008).