Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jennifer J. Diehn, MD

Ophthalmology Physician in Daly City, CA · enumerated 2006.

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

National Provider Identifier

1295813798

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Registry record

Entity type Individual (Type 1)

Name Jennifer J. Diehn

Credential MD

Sex Female

Practice address 395 Hickey Blvd, Daly City, CA, 94015

Phone (650) 742-2000

Enumeration date Nov 1, 2006

Last updated in NPPES Dec 22, 2021

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License A84115 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What is the NPI number for Jennifer Diehn?

The National Provider Identifier (NPI) for Jennifer Diehn is 1295813798, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jennifer Diehn practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-22.