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 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Brogna Salvatore 		2. Issuer Name and Ticker or Trading Symbol

INTUITIVE SURGICAL INC [ ISRG ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

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

1020 KIFER ROAD 		3. Date of Earliest Transaction (MM/DD/YYYY)

9/4/2018
(Street)

SUNNYVALE, CA 94086
(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   9/4/2018     M    562   A $328.4567   2049   D    
Common Stock   9/4/2018     S (1)    562   D $557.4812   1487   D    
Common Stock   9/4/2018     M    563   A $238.9133   2050   D    
Common Stock   9/4/2018     S (1)    563   D $557.5804   1487   D    
Common Stock   9/4/2018     M    304   A $230.9967   1791   D    
Common Stock   9/4/2018     S (1)    304   D $557.2891   1487   D    
Common Stock   9/4/2018     M    305   A $178.3867   1792   D    
Common Stock   9/4/2018     S (1)    305   D $557.2891   1487   D    
Common Stock   9/4/2018     M    459   A $177.6833   1946   D    
Common Stock   9/4/2018     S (1)    459   D $557.2891   1487   D    
Common Stock   9/4/2018     M    459   A $171.3333   1946   D    
Common Stock   9/4/2018     S (1)    459   D $557.2891   1487   D    

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
Non-Qualified Stock Option (right to buy)   $171.3333   9/4/2018     M         459      (2) 2/17/2025   Common Stock   459   $0.0   919   D    
Non-Qualified Stock Option (right to buy)   $177.6833   9/4/2018     M         459      (3) 8/17/2025   Common Stock   459   $0.0   917   D    
Non-Qualified Stock Option (right to buy)   $178.3867   9/4/2018     M         305      (2) 2/16/2026   Common Stock   305   $0.0   1828   D    
Non-Qualified Stock Option (right to buy)   $230.9967   9/4/2018     M         304      (3) 8/15/2026   Common Stock   304   $0.0   1829   D    
Non-Qualified Stock Option (right to buy)   $238.9133   9/4/2018     M         563      (2) 2/15/2027   Common Stock   563   $0.0   5623   D    
Non-Qualified Stock Option (right to buy)   $328.4567   9/4/2018     M         562      (3) 8/15/2027   Common Stock   562   $0.0   5624   D    

Explanation of Responses:
(1)  The shares were sold subject to a 10b5-1 trading plan established on 10-24-17.
(2)  Non-statutory stock option granted pursuant to the 2010 Employee Stock Option Plan. The option vests 1/8th six months after the date of grant and 1/48th monthly thereafter.
(3)  Non-statutory stock option granted pursuant to the 2010 Employee Stock Option Plan. Option shall vest 7/48 one month after the date of grant and 1/48th each month thereafter.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Brogna Salvatore
1020 KIFER ROAD
SUNNYVALE, CA 94086

EVP & Chief Operating Officer

Signatures
By: Lori Serrano For: Salvatore J Brogna 9/4/2018
** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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