William A. Gilmartin, MD
Internal Medicine Physician · Hampton Bays, NY
William A. Gilmartin, MD is an internal medicine physician with a practice address in Hampton Bays, New York, and NPI 1457454670, issued on Sep 6, 2006. Check the license (New York 227116, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- William A. Gilmartin
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 227116 NY
Self-reported in NPPES; status is on the state search - Practice location
- 182 West Montauk Hwy, Hampton Bays, NY 11946
- Phone
- (631) 723-0022
- Enumerated
- Sep 6, 2006
- Record last updated
- Apr 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20031105000629); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 182 West Montauk Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Julie Bates, MDInternal Medicine Physician1235205972
- Marissa Harrington, LCSWClinical Social Worker1831727999
- Alice Mei, DOInternal Medicine Physician1790362853
Verify William A. Gilmartin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 227116Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average internal medicine physician in 2024
4,789 Medicare Part D claims for 508 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Atorvastatin Calcium371 claims
- Amlodipine Besylate370 claims
- Levothyroxine Sodium365 claims
- Rosuvastatin Calcium241 claims
- Losartan Potassium194 claims
- Metformin Hcl184 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): 98.5 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).
Industry payments in 2024: $127.04
6 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Bills Medicare through one group practice
- Meeting House Lane Medical Practice PCHampton Bays, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
9 internal medicine physician records list a practice address in Hampton Bays
They are 9 of the 226 NPPES records with a practice address in Hampton Bays, and 12,067 internal medicine physician records in New York.
All 9 in Hampton Bays → All 12,067 in New York → Every provider in Hampton Bays →
Other internal medicine physician records in New York
- Deborah Aanonsen, D.O.Staten Island, NY1952395717
- Nivedita Aanur, M.D.New York, NY1982833471
- Jay Aaron, MDGreat Neck, NY1245332956
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Zurab Abayev, M.D.Brooklyn, NY1841283058
- Ehab Abaza, MDNew York, NY1114507555
- Vaidarshi Abbagoni, MDNew York, NY1871237495
- Muhammad AbbasRichmond Hill, NY1053996587
Common questions
What is William A. Gilmartin, MD's NPI number?
William A. Gilmartin, MD's National Provider Identifier (NPI) is 1457454670, issued on Sep 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William A. Gilmartin, MD located?
The NPPES record lists a practice address at 182 West Montauk Hwy, Hampton Bays, NY, 11946. Phone: (631) 723-0022. Providers update this record themselves, so call before visiting.
How can I verify William A. Gilmartin, MD's license?
NPPES lists New York license number 227116, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William A. Gilmartin, MD prescribe under Medicare Part D?
In 2024, William A. Gilmartin, MD had 4,789 Medicare Part D claims for 508 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is William A. Gilmartin, MD's MIPS final score?
The 2023 MIPS final score is 98.5 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.