Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Chet W Hammill, MD

Surgery Physician in Portland, OR · enumerated 2007.

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

National Provider Identifier

1720283310

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Registry record

Entity type Individual (Type 1)

Name Dr. Chet W Hammill

Credential MD

Sex Male

Practice address 4805 Ne Glisan St Ste 6n60, Portland, OR, 97213

Phone (503) 281-0561

Fax (503) 416-7377

Enumeration date Jun 15, 2007

Last updated in NPPES Dec 4, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 2017006874 (MO) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD215325 (OR) 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
500607946	Medicaid	OR	-
200040877	Medicaid	MO	-
2003573	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 Chet Hammill's NPI record?

Cross-check NPI 1720283310 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1720283310 active?

Yes, as of the latest NPPES snapshot, NPI 1720283310 is active (record last updated 2025-12-04).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-04.