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Tamar-Mattis, D.O., A Professional Organization

Family Medicine Physician in Sebastopol, CA · enumerated 2025 · authorized official Anne Tamar-Mattis, Chief Adminsitrative Officer.

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

National Provider Identifier

1801605035

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Registry record

Entity type Organization (Type 2)
Legal business name Tamar-Mattis, D.O., A Professional Organization
Practice address 1020 Gravenstein Hwy S Ste 120, Sebastopol, CA, 95472
Phone (707) 861-0807
Enumeration date Jan 2, 2025
Last updated in NPPES Jan 2, 2025

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary
261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities Secondary
261QM2500X Medical Specialty Clinic/Center Ambulatory Health Care Facilities Secondary

Authorized official

Name Anne Tamar-Mattis
Title Chief Adminsitrative Officer
Phone (707) 861-0807

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-01-02. Verify at npiregistry.cms.hhs.gov.
Where is Tamar-Mattis, D.O., A Professional Organization located?
The practice location on file with NPPES is in Sebastopol, CA.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-02.