Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David G Greenhalgh, MD

Surgery Physician in Sacramento, CA · enumerated 2005.

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

National Provider Identifier

1861474199

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Registry record

Entity type Individual (Type 1)

Name Dr. David G Greenhalgh

Credential MD

Sex Male

Practice address 2315 Stockton Blvd, Department of Surgery, Sacramento, CA, 95817

Phone (916) 453-2050

Fax (916) 453-2373

Enumeration date Nov 14, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License G83491 (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

Is NPI 1861474199 active?

Yes, as of the latest NPPES snapshot, NPI 1861474199 is active (record last updated 2007-07-08).

How do I verify David Greenhalgh's NPI record?

Cross-check NPI 1861474199 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 2007-07-08.