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
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                      	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(f) of the Investment Company Act of 1940	                      	

1. Name and Address of Reporting Person *

Howe Roger J	2. Issuer Name and Ticker or Trading Symbol

Cardiovascular Systems Inc [ CSII ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)	
(Last)          (First)          (Middle)

651 CAMPUS DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY)

11/18/2009		
(Street)

ST. PAUL, MN 55112
(City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)

 	6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person	

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned	
1.Title of Security
(Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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  	11/18/2009  	 	S	  	14350  	D	$4.8184   (1)	0  	I  	By Limited Liability Limited Partnership   (2)	

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)	
1. Title of Derivate Security
(Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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	7. Title and Amount of Securities Underlying Derivative Security
(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					
Stock Option (right to buy)  	$9.28  	 	 	   	  	  	  	12/1/2004  	11/30/2009  	Common Stock  	12940  	 	12940  	D  	
 	
Stock Option (right to buy)  	$12.37  	 	 	   	  	  	  	12/1/2005  	11/30/2010  	Common Stock  	9705  	 	9705  	D  	
 	
Stock Option (right to buy)  	$8.83  	 	 	   	  	  	  	12/19/2006  	12/18/2016  	Common Stock  	12940  	 	12940  	D  	
 	
Stock Option (right to buy)  	$7.90  	 	 	   	  	  	  	10/9/2007  	10/8/2017  	Common Stock  	4321  	 	4321  	D  	
 	
Stock Option (right to buy)  	$11.38  	 	 	   	  	  	  	11/13/2007  	11/12/2017  	Common Stock  	15088  	 	15088  	D  	
 	
Stock Option (right to buy)  	$12.15  	 	 	   	  	  	  	12/31/2007  	12/30/2012  	Common Stock  	121490  	 	121490  	D  	
 	
Warrant  	$9.28  	 	 	   	  	  	  	10/25/2005  	11/16/2009  	Common Stock  	8411  	 	8411  	I  	By Limited Liability Limited Partnership   (2)	
Restricted Stock Units  	  (3)	 	 	   	  	  	  	  (3)	  (3)	Common Stock  	5714  	 	5714  	D  	
 	
Restricted Stock Units  	  (4)	 	 	   	  	  	  	  (4)	  (4)	Common Stock  	11628  	 	11628  	D  	

Explanation of Responses:	
(  1) 	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.81 to $4.84, inclusive. The reporting person undertakes to provide Cardiovascular Systems, Inc., any security holder of Cardiovascular Systems, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (1) to this Form 4.	
(  2) 	Shares held by Sonora Web LLLP, of which Dr. Howe is the General Partner.	
(  3) 	Each restricted stock unit represents the right to receive a payment from CSI equal in value to the market price per share of CSI common stock on the date of payment and shall be payable in cash beginning six months following the termination of each director's board membership.	
(  4) 	Each restricted stock unit represents the right to receive a payment from CSI equal in value to the market price per share of CSI common stock on the date of payment, and shall be payable in cash beginning six months following the termination of each director's board membership; provided, however, that the restricted stock units vest in equal quarterly amounts of 2,907 on each of 9/30/2009, 12/31/2009, 3/31/2010 and 6/30/2010.	

Reporting Owners	
Reporting Owner Name / Address	Relationships	
	Director	10% Owner	Officer	Other	
Howe Roger J
651 CAMPUS DRIVE
ST. PAUL, MN 55112	X				

Signatures		
/s/ John R. Remakel as Attorney-in-Fact for Roger J. Howe pursuant to Power of Attorney previously filed.		11/20/2009	
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.	
*	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).	
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