Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Homer E Knudson, M.D.

Specialist in Vienna, VA · enumerated 2006 · practices at Ronald M Rosenberg DDS Ms Ltd.

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

National Provider Identifier

1285666891

Verified

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Registry record

Entity type Individual (Type 1)

Name Homer E Knudson

Credential M.D.

Sex Male

Practice address Vienna, VA, 22182

Phone (703) 790-9440

Fax (703) 790-5359

Enumeration date Jul 6, 2006

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 23301 (VA) 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
4087376	Other	VA	AETNA PPO
07-00455	Other	VA	UNITED HEALTHCARE PIN
088399	Other	VA	ANTHEM PPO/HEALTHKEEPERS
0785845	Other	VA	AETNA HMO
10316	Other	VA	UNICARE
4087	Other	VA	CAREFIRST PPO/ BLUECHOICE
6260730	Medicaid	VA	-
99214	Other	VA	GUARDIAN
1463350004	Other	VA	CIGNA PIN
4087	Other	VA	BLUECROSS BLUESHIELD PPO
27007	Other	VA	OPTIMUMCHOICE/MAMSI/MDIPA

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

Where does Homer Knudson practice?

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

What is the NPI number for Homer Knudson?

The National Provider Identifier (NPI) for Homer Knudson is 1285666891, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Harold Kaplan Clinical Psychologist · Vienna, VA NPI 1679574271 Ronald M Rosenberg DDS Ms Ltd Dentist · Vienna, VA NPI 1194830380 Humberto Andreoli Obstetrics & Gynecology Physician · Vienna, VA NPI 1255431375 Eva Pleta General Practice Dentistry · Vienna, VA NPI 1568548477 David Evans Clinical Social Worker · Vienna, VA NPI 1386849578 David Zimmer Psychiatry Physician · Vienna, VA NPI 1063686566 Ronald Rosenberg Periodontics · Vienna, VA NPI 1609283373

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.