Gregory Haman, M.D.
Internal Medicine Physician · Willimantic, CT
Gregory Haman, M.D. is an internal medicine physician with a practice address in Willimantic, Connecticut, and NPI 1033590773, issued on Jun 17, 2015. Check the license (Connecticut 65062, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Haman
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 65062 CT
125066888 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5 Founders St Ste 100, Willimantic, CT 06226
- Phone
- (860) 423-9764
- Enumerated
- Jun 17, 2015
- Record last updated
- May 6, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200508001093); accepts Medicare assignment
- Medical or professional school
- Harvard Medical School, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 5 Founders St Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kathyrn KonowPhysician Assistant1558095885
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- Maurice Reynolds, FNP-CFamily Nurse Practitioner1700683406
Verify Gregory Haman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 65062Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.7 times the Medicare Part D claims of the average internal medicine physician in 2024
11,783 Medicare Part D claims for 1,083 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 257 claims were for opioids.
Most prescribed
- Atorvastatin Calcium849 claims
- Amlodipine Besylate778 claims
- Losartan Potassium434 claims
- Rosuvastatin Calcium372 claims
- Metoprolol Succinate354 claims
- Hydrochlorothiazide334 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): 93.6 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
- Hartford Healthcare Medical Group IncWillimantic, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Haman among 2,623 internal medicine physician records in Connecticut
Gregory Haman, M.D. is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 74% of them.
- NPI issued2015 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2015 · median 2004 among the 1,646 with a school on file
- Record last updated2020 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 internal medicine physician records list a practice address in Willimantic
They are 20 of the 487 NPPES records with a practice address in Willimantic, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Willimantic → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mary Barry, M.D.Willimantic, CT 062261285695841
- John Carey, MDWillimantic, CT 062261225086358
- Peter Jones, MDWillimantic, CT 062261619934296
- Michael Kilgannon, M.D.Willimantic, CT 062261164483947
- Walter McPhee, MDWillimantic, CT 062261144229113
- Julian Munoz, MDWillimantic, CT 062261184920274
- Edward Nemergut, MDWillimantic, CT 062261508810201
- Chelliah Pandian, MDWillimantic, CT 062261467419010
Common questions
What is Gregory Haman, M.D.'s NPI number?
Gregory Haman, M.D.'s National Provider Identifier (NPI) is 1033590773, issued on Jun 17, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Haman, M.D. located?
The NPPES record lists a practice address at 5 Founders St Ste 100, Willimantic, CT, 06226. Phone: (860) 423-9764. Providers update this record themselves, so call before visiting.
How can I verify Gregory Haman, M.D.'s license?
NPPES lists Connecticut license number 65062, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory Haman, M.D. prescribe under Medicare Part D?
In 2024, Gregory Haman, M.D. had 11,783 Medicare Part D claims for 1,083 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Gregory Haman, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.6 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.