Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Messer, MD

Emergency Medicine Physician in Salem, OR · enumerated 2006.

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

National Provider Identifier

1366555955

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Registry record

Entity type Individual (Type 1)

Name Dr. John Messer

Credential MD

Sex Male

Practice address 665 Winter St Se, Salem, OR, 97301

Phone (503) 561-5634

Enumeration date Aug 16, 2006

Last updated in NPPES Dec 19, 2007

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD10719 (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
115923	Other	-	MARION POLK CHP
115923	Medicaid	OR	-
A005	Other	-	CHAMPUS
C91107	Other	-	PROVIDENCE
M400706	Other	-	PACIFIC SOURCE
XPY049890	Medicaid	CA	-
C91107	Other	-	GROUP HEALTH
8302135	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

Is NPI 1366555955 active?

Yes, as of the latest NPPES snapshot, NPI 1366555955 is active (record last updated 2007-12-19).

How do I verify John Messer's NPI record?

Cross-check NPI 1366555955 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-19.