Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maria-Cecilia Guillermo

Marriage & Family Therapist in San Rafael, CA · enumerated 2006.

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

National Provider Identifier

1538265269

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Registry record

Entity type Individual (Type 1)

Name Maria-Cecilia Guillermo

Sex Female

Practice address 3270 Kerner Blvd Ste B, San Rafael, CA, 94901

Phone (415) 473-3270

Enumeration date Sep 16, 2006

Last updated in NPPES Jul 6, 2010

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFT22935 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
05-1063	Other	-	FQHC MEDICARE PART A
ZZZ29799Z	Other	-	FQHC MEDICARE PART B

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Maria-Cecilia Guillermo?

Maria-Cecilia Guillermo is registered in NPPES with the primary taxonomy of Marriage & Family Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-06.