Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sonoma County Primary Care Ipa

Q: What type of organization is Sonoma County Primary Care Ipa?

Sonoma County Primary Care Ipa is registered in NPPES as a Contractor (its primary provider taxonomy).

Contractor in Foster City, CA · enumerated 2007 · authorized official Nancy Davidson, President.

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

National Provider Identifier

1821112871

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Sonoma County Primary Care Ipa

Practice address 1051 E. Hillsdale Blvd, Suite 750, Foster City, CA, 94404

Phone (650) 358-3114

Fax (650) 358-5706

Enumeration date Mar 16, 2007

Last updated in NPPES Jan 4, 2012

Taxonomy & classification

171W00000X Contractor Other Service Providers Primary

Authorized official

Name Nancy Davidson

Title President

Phone (650) 358-3114

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

What type of organization is Sonoma County Primary Care Ipa?

Sonoma County Primary Care Ipa is registered in NPPES as a Contractor (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.

Providers at this address

Browse all →

Santa Clara Co Ipa Ph.D. Medical Genetics · Foster City, CA NPI 1902930381

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-04.