Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael F Kos, MD

Radiation Oncology Physician in Spokane Valley, WA · enumerated 2007.

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

National Provider Identifier

1366599631

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Registry record

Entity type Individual (Type 1)

Name Michael F Kos

Credential MD

Sex Male

Practice address 13424 E Mission Ave # A, Spokane Valley, WA, 99216

Phone (509) 321-4980

Fax (530) 576-0364

Enumeration date Jan 5, 2007

Last updated in NPPES Mar 18, 2026

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD61157599 (WA) Primary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 9893 (NV) Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License 13640-320 (WI) Secondary

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 1366599631 active?

Yes, as of the latest NPPES snapshot, NPI 1366599631 is active (record last updated 2026-03-18).

How do I verify Michael Kos's NPI record?

Cross-check NPI 1366599631 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-18.