Frank G. Guarnieri, M.D.
Hospitalist Physician · Damariscotta, ME
Frank G. Guarnieri, M.D. is a hospitalist physician with a practice address in Damariscotta, Maine, and NPI 1609803238, issued on Jun 27, 2006. Check the license (Maine 016588, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Frank G. Guarnieri
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 016588 ME
Self-reported in NPPES; status is on the state search - Practice location
- 35 Miles Street, Damariscotta, ME 04543
- Phone
- (207) 563-4268
- Enumerated
- Jun 27, 2006
- Record last updated
- Apr 30, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (207) 563-4103
- Medicaid ID
- 432353599 ME
- Medicare enrollment
- Enrolled (PECOS I20061102000003); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 245 in Maine → Look up another NPI →
Also registered at 35 Miles Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniel Bates, M.D.Emergency Medicine Physician1659533792
- Hans Ruehsen, M.D.Hospitalist Physician1245244524
Verify Frank G. Guarnieri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license 016588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average hospitalist physician in 2024
48 Medicare Part D claims for 27 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frank G. Guarnieri among 245 hospitalist physician records in Maine
Frank G. Guarnieri, M.D. is one of 245 hospitalist physician records with a practice address in Maine. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 71% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 84% of these records are
- Graduated1999 · median 2012 among the 206 with a school on file
- Record last updated2012 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 hospitalist physician records list a practice address in Damariscotta
They are 7 of the 275 NPPES records with a practice address in Damariscotta, and 245 hospitalist physician records in Maine.
All 245 in Maine → Every provider in Damariscotta → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Leticia Bhe, M.D.Damariscotta, ME 045431649229774
- Theresa Piotrowski, MDDamariscotta, ME 045431598794505
- Hans Ruehsen, M.D.Damariscotta, ME 045431245244524
- Jennifer Smith, MDDamariscotta, ME 045431124026778
- Calvin Yates, MDDamariscotta, ME 045431528065208
- Cammey Young, MDDamariscotta, ME 045431548795792
- Wesam Bolkhir, M.D.Ellsworth, ME 046051407060189
- Ari HirshfeldEllsworth, ME 046051881154268
Common questions
What is Frank G. Guarnieri, M.D.'s NPI number?
Frank G. Guarnieri, M.D.'s National Provider Identifier (NPI) is 1609803238, issued on Jun 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frank G. Guarnieri, M.D. located?
The NPPES record lists a practice address at 35 Miles Street, Damariscotta, ME, 04543. Phone: (207) 563-4268. Providers update this record themselves, so call before visiting.
How can I verify Frank G. Guarnieri, M.D.'s license?
NPPES lists Maine license number 016588, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Frank G. Guarnieri, M.D. prescribe under Medicare Part D?
In 2024, Frank G. Guarnieri, M.D. had 48 Medicare Part D claims for 27 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Frank G. Guarnieri, M.D.'s MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.