Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Margaret Ryerson, MFT

Marriage & Family Therapist in Walnut Creek, CA · enumerated 2008.

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

National Provider Identifier

1235301060

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Registry record

Entity type Individual (Type 1)

Name Margaret Ryerson

Credential MFT

Sex Female

Practice address Walnut Creek, CA, 94596

Phone (925) 376-9323

Enumeration date Apr 1, 2008

Last updated in NPPES Apr 1, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC8805 (CA) Primary

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 is the NPI number for Margaret Ryerson?

The National Provider Identifier (NPI) for Margaret Ryerson is 1235301060, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Ryerson practice?

The practice location on file with NPPES is in Walnut Creek, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Devlin Kelly Clinical Psychologist · Walnut Creek, CA NPI 1447309505 Teresa Ramakrishnan Marriage & Family Therapist · Walnut Creek, CA NPI 1205293073

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-01.