Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Clark O. Parrish, M.D.

Internal Medicine Physician in Bellingham, WA · enumerated 2005.

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

National Provider Identifier

1891791232

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Registry record

Entity type Individual (Type 1)

Name Clark O. Parrish

Credential M.D.

Sex Male

Practice address 4545 Cordata Pkwy, Bellingham, WA, 98226

Phone (360) 738-2200

Fax (360) 715-2486

Enumeration date Jun 21, 2005

Last updated in NPPES Mar 29, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD188136 (OR) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD00024849 (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
4587184	Other	WA	AETNA
1032549	Medicaid	WA	-
12304	Other	WA	REGENCE
0230044	Other	WA	L&I AND CRIME VICTIMS
1891791232	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.

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Frequently asked questions

How do I verify Clark Parrish's NPI record?

Cross-check NPI 1891791232 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891791232 active?

Yes, as of the latest NPPES snapshot, NPI 1891791232 is active (record last updated 2019-03-29).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-03-29.