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 *
SHERWIN STEPHEN A
   2. Issuer Name and Ticker or Trading Symbol
NEUROCRINE BIOSCIENCES INC [NBIX] 		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)
12780 EL CAMINO REAL		 3. Date of Earliest Transaction (Month/Day/Year)
03/28/2013
(Street)

SAN DIEGO, CA 92130		 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 03/28/2013   M   12,000 A $ 10.6 12,000 (1) D  
Common Stock 03/28/2013   F   10,469 D $ 12.15 1,531 (1) D  

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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
Stock Option $ 10.6 03/28/2013   M     12,000 06/30/2008 06/30/2013 Common Stock 12,000 $ 0 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
SHERWIN STEPHEN A
12780 EL CAMINO REAL
SAN DIEGO, CA 92130		   X      

Signatures

 Margaret E. Valeur-Jensen, By Power of Attorney   04/01/2013
**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) The share issuance reported on Table I reflects shares issued upon the exercise of options granted on June 30, 2006, which, if unexercised, would have expired on June 30, 2013. The option exercises are reported on Table II. These option exercises were pursuant to a net issuance arrangement effected under the issuer's equity incentive plan. The number of shares issued pursuant to the net issuance arrangement was calculated as follows: the option exercise price ($10.60) was subtracted from the March 28, 2013 market close price ($12.15), and this net amount ($1.55) was then multiplied by the number of options (12,000), with the resulting amount then divided by the market close price to result in a net issuance of 1,531 shares to the optionee. The 10,469 shares underlying the remaining portion of the options are not available for reissuance, and no shares are sold into the market as part of the exercise in connection with a net issuance program.

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