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John Muir Physicians PC

Internal Medicine Physician in Orinda, CA · enumerated 2018 · authorized official Andre Westin, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235606823

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Registry record

Entity type Organization (Type 2)
Legal business name John Muir Physicians PC
Practice address 11 Altarinda Rd, Orinda, CA, 94563
Phone (925) 243-7744
Enumeration date Nov 1, 2018
Last updated in NPPES Nov 14, 2018

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Andre Westin
Title Owner
Phone (415) 990-0242

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What type of organization is John Muir Physicians PC?
John Muir Physicians PC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).
What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-14.