Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
HAAS WILLIAM
   2. Issuer Name and Ticker or Trading Symbol
LABORATORY CORP OF AMERICA HOLDINGS [LH] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP, Sales & Marketing
(Last)
(First)
(Middle)
430 SOUTH SPRING STREET		 3. Date of Earliest Transaction (Month/Day/Year)
08/02/2005
(Street)

BURLINGTON, NC 27215		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/02/2005   M   2,666 A $ 26.7031 (1) 18,989 (2) D  
Common Stock 08/02/2005   M   15,000 A $ 39 33,989 (2) D  
Common Stock 08/02/2005   M   14,600 A $ 43.53 48,589 (2) D  
Common Stock 08/02/2005   M   4,867 A $ 24.46 53,456 (2) D  
Common Stock 08/02/2005   M   3,600 A $ 28.18 57,056 (2) D  
Common Stock 08/02/2005   M   20,000 A $ 33.0625 77,056 (2) D  
Common Stock 08/02/2005   S   60,733 D $ 51 16,323 (2) D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-qualified Stock Options (3) $ 26.7031 (1) 08/02/2005   M     2,666 08/16/2001(4) 08/16/2010 Common Stock 2,666 $ 26.7031 (1) 0 D  
Non-qualified Stock Options (5) $ 33.0625 08/02/2005   M     20,000 02/05/2002(4) 02/05/2011 Common Stock 20,000 $ 33.0625 0 D  
Non-qualified Stock Options (3) $ 43.53 08/02/2005   M     14,600 02/14/2003(4) 02/14/2012 Common Stock 14,600 $ 43.53 0 D  
Non-qualified Stock Options (6) $ 24.46 08/02/2005   M     4,867 02/19/2004(4) 02/19/2013 Common Stock 4,867 $ 24.46 4,866 D  
Non-qualified Stock Options (3) $ 28.18 08/02/2005   M     3,600 03/25/2004(4) 03/25/2013 Common Stock 3,600 $ 28.18 1,800 D  
Non-qualified Stock Options (3) $ 39 08/02/2005   M     15,000 02/17/2005(4) 02/17/2014 Common Stock 15,000 $ 39 30,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
HAAS WILLIAM
430 SOUTH SPRING STREET
BURLINGTON, NC 27215		       EVP, Sales & Marketing  

Signatures

 By: /s/ BRADFORD T. SMITH, Attorney-in-Fact for William B. Haas   08/04/2005
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Actual exercise price was $26.703125. The filing software truncates the price to only four decimal places.
(2) Amount shown reflects a 2-for-1 stock split effective on May 10, 2002.
(3) Common stock purchase option granted under the Laboratory Corporation of America Holdings 2000 Stock Incentive Plan.
(4) The option vests in three equal annual installments beginning on the date reflected in this column.
(5) Common stock purchase option granted under the Laboratory Corporation of America Holdings 1999 Amended and Restated Stock Incentive Plan.
(6) Common stock purchase option granted under the1994 Stock Option Plan.

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