Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas W Greisamer, M.D.

Psychiatry Physician in Everett, WA · enumerated 2006.

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

National Provider Identifier

1780787648

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Registry record

Entity type Individual (Type 1)

Name Thomas W Greisamer

Credential M.D.

Sex Male

Practice address 2000 W. Marine View, Building 2010, Branch Health Clinic Evertt, Everett, WA, 98207

Phone (360) 475-4426

Fax (360) 475-4344

Enumeration date Sep 6, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD00033344 (WA) Primary

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

What is the NPI number for Thomas Greisamer?

The National Provider Identifier (NPI) for Thomas Greisamer is 1780787648, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Greisamer practice?

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

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