Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Arnold Combs, M.D.

Otolaryngology Physician in Santa Rosa, CA · enumerated 2006.

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

National Provider Identifier

1073687539

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. William Arnold Combs

Credential M.D.

Sex Male

Practice address 1701 4th St Ste 120, Santa Rosa, CA, 95404

Phone (707) 523-7025

Enumeration date Nov 17, 2006

Last updated in NPPES Nov 3, 2022

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License MD60030905 (WA) Secondary

207YX0602X Otolaryngic Allergy Physician Allopathic & Osteopathic Physicians · License MD60030905 (WA) Secondary

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License G20429 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
516502609	Other	CA	COMMERICAL INSURANCE
00G204290	Medicaid	CA	-
040016401	Other	CA	MEDICARE RAILROAD

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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is William Combs?

William Combs is registered in NPPES with the primary taxonomy of Otolaryngology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-03.