NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David Michael Larson, M.D.

Adult Medicine Physician in Encinitas, CA · enumerated 2011 · practices at David Larson MD PC.

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

National Provider Identifier

1609164391

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Registry record

Entity type Individual (Type 1)
Name Dr. David Michael Larson
Credential M.D.
Sex Male
Practice address 345 Saxony Rd Ste 206, Encinitas, CA, 92024
Phone (858) 367-3401
Fax (760) 456-4703
Enumeration date Jul 14, 2011
Last updated in NPPES Sep 1, 2019

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License A122666 (CA) Secondary
207QA0505X Adult Medicine Physician Allopathic & Osteopathic Physicians · License A122666 (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

Is NPI 1609164391 active?
Yes, as of the latest NPPES snapshot, NPI 1609164391 is active (record last updated 2019-09-01).
How do I verify David Larson's NPI record?
Cross-check NPI 1609164391 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-09-01.