AMAST MEDICAL ASSOCIATES, PC
NPI 1184519241
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Q: What is Amast Medical Associates, PC's NPI number?

The NPI number for Amast Medical Associates, PC is 1184519241. It was assigned to this organization in the NPPES registry on June 10, 2025. The provider is doing business as Amast Medical Associates.

Q: What is Amast Medical Associates, PC's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Active since June 10, 2025

166 GEARY ST, STE 1500 #1717, SAN FRANCISCO, CA 94108(415) 745-2855 Get Directions Write a Review

NPPES record last updated: December 6, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Dec 6, 2025, Jun 10, 2025 (2 updates tracked since 2025).

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About Amast Medical Associates, Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

AMAST MEDICAL ASSOCIATES, PC (NPI 1184519241), doing business as Amast Medical Associates, is a healthcare organization registered as a psychiatry in San Francisco, California and active in the NPI registry since June 2025. The organization lists Jack Hale Buchanan, Co-owner & Physician, as its authorized official.

NPPES Registry Identity

NPI1184519241

Entity TypeOrganization

Primary Taxonomy2084P0800X

Legal Business NameAMAST MEDICAL ASSOCIATES, PC

Location Address166 GEARY ST, STE 1500 #1717San Francisco, CA 94108-5628

Mailing Address166 Geary St, Ste 1500 #1717San Francisco, CA 94108-5628 · (415) 745-2855

Phone(415) 745-2855

Organization SubpartNo

Authorized OfficialJack Hale BuchananCo-owner & Physician · (415) 745-2855

Enumeration DateJune 10, 2025

Last NPPES UpdateDecember 6, 20252 updates tracked since enumeration

NPPES CertifiedDecember 6, 2025

✔ NPI 1184519241 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

166 GEARY ST, San Francisco, CA 94108

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Other Names 1

Doing Business AsAmast Medical Associates

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANEESH RANGNEKAR D.C.

Chiropractor

166 GEARY ST, #1102
SAN FRANCISCO, CA 94108

San Francisco County (415) 420-0044

ORTHOLIVE MEDICAL GROUP - CA PC

Clinic/Center (Multi-Specialty)

166 GEARY ST
SAN FRANCISCO, CA 94108

San Francisco County (866) 456-7846

REBECCA G. PILTCH, M.D., INC.

Allergy & Immunology

166 GEARY ST, SUITE 1102
SAN FRANCISCO, CA 94108

San Francisco County (415) 499-9991

SAMAR KOOPAH DDS

Dentist (General Practice)

166 GEARY ST, # 8
SAN FRANCISCO, CA 94108

San Francisco County (415) 260-4574

DR. ALI REZA KOOPAH D.D.S.

Dentist (General Practice)

166 GEARY ST, 8TH FLOOR
SAN FRANCISCO, CA 94108

San Francisco County (415) 421-2652

REBECCA G. VANLANDINGHAM MD

Allergy & Immunology

166 GEARY ST, SUITE 1102
SAN FRANCISCO, CA 94108

San Francisco County (415) 499-9991

HAMMOCK HEALTH INCORPORATED

Clinic/Center (Adult Mental Health)

166 GEARY ST, STE 1500 #1717
SAN FRANCISCO, CA 94108

San Francisco County (415) 745-2855

HALIMA AHMADU THORSEN MPT

Physical Therapist (Orthopedic)

166 GEARY ST, STE 1102
SAN FRANCISCO, CA 94108

San Francisco County (415) 682-4610

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Amast Medical Associates, PC's NPI number?

The NPI number for Amast Medical Associates, PC is 1184519241. It was assigned to this organization in the NPPES registry on June 10, 2025. The provider is doing business as Amast Medical Associates.

Where is Amast Medical Associates, PC located?

Amast Medical Associates, PC is located at 166 Geary St Ste 1500 #1717, San Francisco, CA 94108. The listed phone number is (415) 745-2855.

What is Amast Medical Associates, PC's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

When was this NPI record last updated?

The NPPES record for Amast Medical Associates, PC was last updated on December 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.