Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Frank G. Guarnieri, M.D.

Hospitalist Physician in Damariscotta, ME · enumerated 2006 · practices at Miles Memorial Hospital Incorporated.

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

National Provider Identifier

1609803238

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Registry record

Entity type Individual (Type 1)

Name Frank G. Guarnieri

Credential M.D.

Sex Male

Practice address 35 Miles Street, Damariscotta, ME, 04543

Phone (207) 563-4268

Fax (207) 563-4103

Enumeration date Jun 27, 2006

Last updated in NPPES Apr 30, 2012

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 016588 (ME) 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
1461988	Other	-	AETNA HMO
432353599	Medicaid	ME	-
098415	Other	ME	ANTHEM
AA71440	Other	-	HARVARD PILGRIM
01-0443255	Other	-	CIGNA
7399393	Other	-	AETNA NON HMO
P00359220	Other	-	RAILROAD MEDICARE

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 Frank Guarnieri's NPI record?

Cross-check NPI 1609803238 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609803238 active?

Yes, as of the latest NPPES snapshot, NPI 1609803238 is active (record last updated 2012-04-30).

Other providers at this practice address

Browse all →

Hans Ruehsen Hospitalist Physician · Damariscotta, ME NPI 1245244524 Miles Memorial Hospital Incorporated General Acute Care Hospital · Damariscotta, ME NPI 1699860106 John Murray Emergency Medicine Physician · Damoriscotta, ME NPI 1902960792 Daniel Bates Emergency Medicine Physician · Damariscotta, ME NPI 1659533792

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-30.