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

Dr. Peter S Hartwell, M.D.

Gastroenterology Physician in Burien, WA · enumerated 2005.

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

National Provider Identifier

1750379004

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Peter S Hartwell

Credential M.D.

Sex Male

Practice address Burien, WA, 98166

Phone (206) 431-9771

Fax (206) 431-5484

Enumeration date Oct 11, 2005

Last updated in NPPES Apr 29, 2008

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

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License MD00019997 (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
1083583	Medicaid	WA	-
2216827	Other	WA	AETNA
100016506	Other	WA	RR MEDICARE
43442	Other	WA	L&I
HA6009	Other	WA	REGENCE PROV #

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

How do I verify Peter Hartwell's NPI record?

Cross-check NPI 1750379004 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1750379004 active?

Yes, as of the latest NPPES snapshot, NPI 1750379004 is active (record last updated 2008-04-29).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-29.