Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen Allison, M.D., A Professional Corporation

Psychiatry Physician in Sausalito, CA · enumerated 2015 · authorized official Stephen Allison, Owner.

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

National Provider Identifier

1326436668

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Registry record

Entity type Organization (Type 2)

Legal business name Stephen Allison, M.D., A Professional Corporation

Practice address 3030 Bridgeway Ste 206, Sausalito, CA, 94965

Phone (415) 952-3101

Fax (415) 534-3439

Enumeration date Jan 8, 2015

Last updated in NPPES May 4, 2016

Taxonomy & classification

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A118576 (CA) Primary

Authorized official

Name Stephen Allison

Title Owner

Phone (415) 952-3101

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Stephen Allison, M.D., A Professional Corporation located?

The practice location on file with NPPES is in Sausalito, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2016-05-04. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-04.