Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Virgil Ernest Knackstedt, M.D.

Specialist in Olympia, WA · enumerated 2005 · practices at South Sound Radiologists Inc P S.

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

National Provider Identifier

1083605307

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Registry record

Entity type Individual (Type 1)

Name Dr. Virgil Ernest Knackstedt

Credential M.D.

Sex Male

Practice address 3417 Ensign Rd Ne, Olympia, WA, 98506

Phone (360) 493-4601

Fax (360) 493-4603

Enumeration date Nov 4, 2005

Last updated in NPPES Sep 11, 2013

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD00019853 (WA) 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
8288805	Medicaid	WA	-

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 1083605307 active?

Yes, as of the latest NPPES snapshot, NPI 1083605307 is active (record last updated 2013-09-11).

How do I verify Virgil Knackstedt's NPI record?

Cross-check NPI 1083605307 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 2013-09-11.