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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Margo Elizabeth Hanlan, PNP

Pediatric Nurse Practitioner in Larkspur, CA · enumerated 2013 · practices at Tamalpais Pediatrics.

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

National Provider Identifier

1891034328

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Registry record

Entity type Individual (Type 1)
Name Ms. Margo Elizabeth Hanlan
Credential PNP
Sex Female
Practice address 5 Bon Air Road, Ste. 105, Larkspur, CA, 94939
Phone (415) 461-0440
Fax (415) 461-3792
Enumeration date Feb 4, 2013
Last updated in NPPES Jan 6, 2016

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 0024170555 (VA) Secondary
363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 95002831 (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.

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Frequently asked questions

How do I verify Margo Hanlan's NPI record?
Cross-check NPI 1891034328 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1891034328 active?
Yes, as of the latest NPPES snapshot, NPI 1891034328 is active (record last updated 2016-01-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-06.