Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Patrick M Lassen, M.D.

Urology Physician in Longview, WA · enumerated 2005.

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

National Provider Identifier

1285632919

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Registry record

Entity type Individual (Type 1)

Name Patrick M Lassen

Credential M.D.

Sex Male

Practice address 625 9th Ave, Suite 120, Longview, WA, 98632

Phone (360) 636-8950

Fax (360) 636-8951

Enumeration date Jul 7, 2005

Last updated in NPPES Mar 3, 2020

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License MD000037114 (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
8239790	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 1285632919 active?

Yes, as of the latest NPPES snapshot, NPI 1285632919 is active (record last updated 2020-03-03).

How do I verify Patrick Lassen's NPI record?

Cross-check NPI 1285632919 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 2020-03-03.