Katherine Gassman, D.O.
Family Medicine Physician · Bar Harbor, ME
Katherine Gassman, D.O. is a family medicine physician with a practice address in Bar Harbor, Maine, and NPI 1851653620, issued on Jun 8, 2012. Check the license on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine Gassman
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- OP60641519 WA
Q4157 TX
Self-reported in NPPES; status is on the state search - Practice location
- 322 Main St, Bar Harbor, ME 04609
- Phone
- (207) 288-5119
- Enumerated
- Jun 8, 2012
- Entity
- Type 1 · individual
Also registered at 322 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bruce Bosinger, LCPC-CProfessional Counselor1841807823
- Contessa Brophy, LCSW-CCClinical Social Worker1932270162
- Ruby BrownSpeech-Language Pathologist1548180870
- Beverly Chasse, PMHN, CNSClinical Nurse Specialist1316167109
- Charlotte Clews, LMSW-CCClinical Social Worker1164252474
- Susan Darling, LCSWClinical Social Worker1558794107
Verify Katherine Gassman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
8% fewer Medicare Part D claims than the average family medicine physician in 2024
3,235 Medicare Part D claims for 203 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. 160 claims were for opioids.
Most prescribed
- Levothyroxine Sodium170 claims
- Atorvastatin Calcium155 claims
- Lisinopril110 claims
- Sertraline Hcl88 claims
- Losartan Potassium85 claims
- Amlodipine Besylate77 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 practice group's Medicare quality score for 2023: 88 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $20.09
1 payment, mostly food and beverage; the largest payer was Novo Nordisk Inc. The 53,013 providers of this specialty with any payment received $861.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital and facility affiliations
- Mount Desert Island HospitalBar Harbor, ME · Critical Access Hospitals
- Salida Hospital DistrictSalida, CO
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
9 family medicine physician records list a Bar Harbor practice address
They are 9 of the 157 NPPES records with a Bar Harbor practice address, and 1,168 family medicine physician records in Maine.
All 9 in Bar Harbor → All 1,168 in Maine → Every provider in Bar Harbor →
Other family medicine physician records in Maine
- Jeffrey Aalberg, MDFalmouth, ME1669400222
- Elizabeth Abbas, DOFarmington, ME1932588100
- Robert Abrams, M.D.Lubec, ME1720067010
- Andrea Abrell, DOAugusta, ME1558525188
- Katie Adams, MDLincoln, ME1154764975
- Sophia AdamsPortland, ME1073961892
- Thomas Adams, MDSouthwest Harbor, ME1851331565
- Rebecca Adamson, MDLewiston, ME1912313982
- Constance Adler, M.D., F.A.A.F.P.Farmington, ME1487689675
- Devesh Agarwal, M.D.Lincoln, ME1710116876
Common questions
What is Katherine Gassman, D.O.'s NPI number?
Katherine Gassman, D.O.'s National Provider Identifier (NPI) is 1851653620, issued on Jun 8, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Gassman, D.O. located?
The NPPES record lists a practice address at 322 Main St, Bar Harbor, ME, 04609. Phone: (207) 288-5119. Providers update this record themselves, so call before visiting.
How can I verify Katherine Gassman, D.O.'s license?
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 Katherine Gassman, D.O. prescribe under Medicare Part D?
In 2024, Katherine Gassman, D.O. had 3,235 Medicare Part D claims for 203 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
What is Katherine Gassman, D.O.'s Medicare quality score?
The 2023 MIPS final score is 88 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.