Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Glen Douglas, MD

General Practice Physician in Sacramento, CA · enumerated 2009.

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

National Provider Identifier

1477793727

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Registry record

Entity type Individual (Type 1)

Name William Glen Douglas

Credential MD

Sex Male

Practice address 3701 J St Ste 201, Sacramento, CA, 95816

Phone (916) 454-2345

Enumeration date Feb 26, 2009

Last updated in NPPES Sep 12, 2022

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License G46175 (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 1477793727 active?

Yes — as of the latest NPPES snapshot, NPI 1477793727 is active (record last updated 2022-09-12).

How do I verify William Douglas's NPI record?

Cross-check NPI 1477793727 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 2022-09-12.