NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Northern California Medical Assoc Inc

Internal Medicine Physician in Santa Rosa, CA · enumerated 2006 · authorized official Ruth Skidmore, Chief Executive Officer.

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

National Provider Identifier

1821077231

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Northern California Medical Assoc Inc
Practice address 5555 Montgomery Dr, Santa Rosa, CA, 95409
Phone (707) 546-2180
Fax (707) 546-2188
Enumeration date Jan 13, 2006
Last updated in NPPES Feb 9, 2012

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary
207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Ruth Skidmore
Title Chief Executive Officer
Phone (707) 573-6925

Other identifiers

Identifier Type State Issuer
ZZZ65993Z Other CA BLUE SHIELD OF CALIFORNIA
GR000173E Medicaid CA -

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

Who is the authorized official for Northern California Medical Assoc Inc?
NPPES lists Ruth Skidmore (Chief Executive Officer) as the authorized official for this organization.
What is the NPI number for Northern California Medical Assoc Inc?
The NPI for Northern California Medical Assoc Inc is 1821077231, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-09.