Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Allison Joyce Holt Larkin, MSN, NP

Family Nurse Practitioner in Foster City, CA · enumerated 2013 · practices at Longs Drug Stores California LLC.

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

National Provider Identifier

1548691686

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Registry record

Entity type Individual (Type 1)

Name Mrs. Allison Joyce Holt Larkin

Credential MSN, NP

Sex Female

Practice address 987 E Hillsdale Blvd, Foster City, CA, 94404

Phone (408) 996-1911

Enumeration date Nov 27, 2013

Last updated in NPPES Aug 1, 2023

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP9500477 (CA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP013430 (PA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License NP95004777 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Allison Larkin?

Allison Larkin is registered in NPPES with the primary taxonomy of Family Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-01.