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

Ms. Marie Lynn Ongaro, LAC, FNP

Acupuncturist in San Anselmo, CA · enumerated 2015.

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

National Provider Identifier

1831584309

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Registry record

Entity type Individual (Type 1)
Name Ms. Marie Lynn Ongaro
Credential LAC, FNP
Sex Female
Practice address San Anselmo, CA, 94960
Phone (415) 519-5323
Fax (415) 457-6856
Enumeration date Apr 1, 2015
Last updated in NPPES Apr 1, 2015

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

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License 16174 (CA) Primary
363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 431002 (CA) Secondary
LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC credential

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

Where does Marie Ongaro practice?
The practice location on file with NPPES is in San Anselmo, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marie Ongaro?
The National Provider Identifier (NPI) for Marie Ongaro is 1831584309, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-01.