EXHIBIT A

AGREEMENT

Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13D need to be filed with respect to the ownership by each of the undersigned of shares of Common Stock of Imago BioSciences, Inc.


Date: November 14, 2022	FRAZIER HEALTHCARE VII, L.P.
	By	FHM VII, L.P., its general partner
	By	FHM VII, L.L.C., its general partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FRAZIER HEALTHCARE VII-A, L.P.
	By	FHM VII, L.P., its general partner
	By	FHM VII, L.L.C., its general partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHM VII, L.P.
	By	FHM VII, L.L.C., its general partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHM VII, L.L.C.

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FRAZIER LIFE SCIENCES PUBLIC FUND, L.P.
	By:	FHMLSP, L.P., its General Partner
	By:	FHMLSP, L.L.C., its General Partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer


Date: November 14, 2022	FHMLSP, L.P.
	By:	FHMLSP, L.L.C., its General Partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHMLSP, L.L.C.

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FRAZIER LIFE SCIENCES PUBLIC OVERAGE FUND, L.P.
	By:	FHMLSP Overage, L.P., its General Partner
	By:	FHMLSP Overage, L.L.C., its General Partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHMLSP OVERAGE, L.P.
	By	FHMLSP Overage, L.L.C., its General Partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHMLSP OVERAGE, L.L.C.

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FRAZIER LIFE SCIENCES XI, L.P.
	By	FHMLS XI, L.P., its general partner
	By	FHMLS XI, L.L.C., its general partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

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Date: November 14, 2022	FHMLS XI, L.P.
	By FHMLS XI, L.L.C., its general partner

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	FHMLS XI, L.L.C.

	By:	/s/ Steve R. Bailey
		Steve R. Bailey, Chief Financial Officer

Date: November 14, 2022	By:	*
		James N. Topper

Date: November 14, 2022	By:	*
		Patrick J. Heron

Date: November 14, 2022	By:	*
		Alan Frazier

Date: November 14, 2022	By:	*
		Nader Naini

Date: November 14, 2022	By:	*
		Nathan Every

Date: November 14, 2022	By:	*
		Brian Morfitt

Date: November 14, 2022	By:	**
		Albert Cha

Date: November 14, 2022	By:	**
		James Brush

Date: November 14, 2022	By:	***
		Daniel Estes

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Date: November 14, 2022	By:	/s/ Steve R. Bailey
		Steve R. Bailey, as Attorney-in-Fact

*	This Agreement was executed by Steve R. Bailey on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on March 29, 2016.

**	This Agreement was executed by Steve R. Bailey on behalf of the individuals listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on August 16, 2021.

***	This Agreement was executed by Steve R. Bailey on behalf of the individual listed above pursuant to a Power of Attorney, a copy of which was filed with the SEC on April 18, 2022.

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Imago BioSciences, Inc. SC 13D/A