Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David Duff Henderson, M.D.

Forensic Psychiatry Physician in Atascadero, CA · enumerated 2008.

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

National Provider Identifier

1346400249

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Registry record

Entity type Individual (Type 1)

Name Dr. David Duff Henderson

Credential M.D.

Sex Male

Practice address 1033 El Camino Real, Atascadero, CA, 93422

Phone (805) 468-2005

Fax (805) 468-2138

Enumeration date Jun 13, 2008

Last updated in NPPES Sep 13, 2016

Taxonomy & licenses

2084F0202X Forensic Psychiatry Physician Allopathic & Osteopathic Physicians · License A137382 (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

Where does David Henderson practice?

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

What is the NPI number for David Henderson?

The National Provider Identifier (NPI) for David Henderson is 1346400249, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-13.