Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark B Snowden

Psychiatry Physician in Seattle, WA · enumerated 2006.

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

National Provider Identifier

1376623272

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Registry record

Entity type Individual (Type 1)

Name Mark B Snowden

Sex Male

Practice address Harborview Medical Center, 325 9th Ave, Seattle, WA, 98104

Phone (206) 731-3000

Enumeration date Oct 16, 2006

Last updated in NPPES Jan 12, 2012

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD00029944 (WA) Primary

Other identifiers

Identifier	Type	State	Issuer
260033431	Other	WA	RAIL ROAD MEDICARE
1376623272	Medicaid	WA	-
0174994	Other	WA	L&I
8891	Other	-	INTERNAL ID-MOTOR VEHICLE ID

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 specialty is Mark Snowden?

Mark Snowden is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-12.