NPI Portal NPI Lookup & Verification

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

Dr. Michael Sean Green, M.D.

Legal Medicine (M.D./D.O.) Physician in Lake Oswego, OR · enumerated 2006.

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

National Provider Identifier

1265537187

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Registry record

Entity type Individual (Type 1)
Name Dr. Michael Sean Green
Credential M.D.
Sex Male
Practice address Lake Oswego, OR, 97035
Phone (503) 635-1604
Fax (503) 635-6659
Enumeration date Sep 14, 2006
Last updated in NPPES Apr 1, 2026

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

Taxonomy & licenses

209800000X Legal Medicine (M.D./D.O.) Physician Allopathic & Osteopathic Physicians · License MD18372 (OR) 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
081799 Medicaid OR -

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

Is NPI 1265537187 active?
Yes, as of the latest NPPES snapshot, NPI 1265537187 is active (record last updated 2026-04-01).
How do I verify Michael Green's NPI record?
Cross-check NPI 1265537187 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 2026-04-01.