Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David W Hirshfield, MD

Internal Medicine Physician in La Jolla, CA · enumerated 2006.

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

National Provider Identifier

1538127402

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Registry record

Entity type Individual (Type 1)

Name David W Hirshfield

Credential MD

Sex Male

Practice address 9850 Genesee Ave Ste 320, La Jolla, CA, 92037

Phone (858) 554-1212

Fax (858) 795-1195

Enumeration date May 2, 2006

Last updated in NPPES Feb 3, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0057896 (MD) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A61886 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for David Hirshfield?

The National Provider Identifier (NPI) for David Hirshfield is 1538127402, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Hirshfield practice?

The practice location on file with NPPES is in La Jolla, 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 2022-02-03.