Exhibit A

JOINT FILING STATEMENT

I, the undersigned, hereby express my agreement that the attached Schedule 13D (and any amendments thereto) relating to the Common Stock of Ocera Therapeutics, Inc. is filed on behalf of each of the undersigned.

Date: November 13, 2013

INTERWEST PARTNERS IX, L.P.

By:	InterWest Management Partners IX, LLC
Its:	General Partner
By:	/s/ W. Stephen Holmes III
	W. STEPHEN HOLMES III
	Managing Director
INTERWEST MANAGEMENT PARTNERS IX, LLC
By:	/s/ W. Stephen Holmes III
	W. STEPHEN HOLMES III
	Managing Director

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Philip T. Gianos

      /s/ W. Stephen Holmes III

W. Stephen Holmes III

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Gilbert H. Kliman

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Arnold L. Oronsky

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Nina Kjellson

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Douglas A. Pepper

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Bruce A. Cleveland

      /s/ Karen A. Wilson

Karen A. Wilson, Attorney-in-Fact for Khaled A. Nasr