Dr. Gregory Haman, MD
- Medicare services, 2024
- 1,026
- Medicare patients, 2024
- 251
- Part D claims, 2024
- 11,783
- MIPS score, 2024
- 94
- Hospital affiliations
- 3
- Practice address
- 5 Founders St, Willimantic, CT 06226
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hartford Healthcare Cancer Institute - HOPD
Acute Care Hospital outpatient department · Willimantic, Connecticut
Find Dr. Haman's professional email, personal email and mobile number
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Dr. Gregory Haman is an internist in Willimantic, Connecticut
Dr. Haman practices at Hartford Healthcare Cancer Institute - HOPD in Willimantic, Connecticut.
Dr. Haman's NPI, 1033590773, was assigned on June 17, 2015. Dr. Haman graduated from Harvard Medical School in 2015. Dr. Haman holds Connecticut license 65062.
- NPI
- 1033590773NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961702964
- NPI enumeration date
- June 17, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Haman practices at Hartford Healthcare Cancer Institute - HOPD in Willimantic, Connecticut
Dr. Haman's primary practice is Hartford Healthcare Cancer Institute - HOPD, at 5 Founders St, Willimantic, CT 06226.
- Hartford Healthcare Cancer Institute - HOPD5 Founders St, Willimantic, CT 06226
Source: Dmand AI Affiliation Data
Dr. Gregory Haman is affiliated with 8 sites of care and 5 medical groups
Dr. Haman's primary practice is Hartford Healthcare Cancer Institute - HOPD in Willimantic, Connecticut. Dr. Haman is also affiliated with Windham Hospital. The medical group on file is Hartford HealthCare Medical Group. Dmand AI also links Dr. Haman to 2 more hospitals, 4 medical groups, 3 group practices and clinics and 1 home health agency, each named with a free account. Dr. Haman's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Haman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Haman practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hartford Healthcare Cancer Institute - HOPD | Available with a free account |
| +7 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Haman is one of 2,189 internists in Connecticut
Internal medicine is Dr. Haman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Haman's licenses on file in 2 states: Connecticut and Illinois.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
- Illinois license
Internists near Dr. Haman
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Haman billed Medicare for 1,026 services in 2024
CMS data shows 1,026 Medicare services from Dr. Haman across 13 procedure codes in 2024, for 251 Medicare patients. Medicare paid $93,749 for them. Every service was in an office.
Dr. Haman's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5922024: 6276%
- Other services
- 2023: 3032024: 24718%
- Lab and pathology
- 2023: 542024: 7946%
- Tests and treatments
- 2023: 2192024: 7367%
Dr. Haman compared with the Connecticut median for internists, 2024
- Dr. Haman
- Connecticut median
- Medicare services
- 1,026vs 3902.6 times
- Medicare patients
- 251vs 17246% above
- Part D claims
- 11,020vs 34332.1 times
Medians across 2,185 internists in Connecticut with Dmand AI profiles that report each measure.
Dr. Haman's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Haman treated 251 Medicare patients in 2024, average age 75
CMS counts 251 Medicare patients who saw Dr. Haman in 2024. The largest group is 65 to 74, with 85 patients. 75% of them have high blood pressure, and 72% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Haman's median patient age at 70, with 37% women.
Dr. Haman's Medicare patients by age, 2024
Dr. Haman's Medicare patients by sex, 2024
- Women10140%
- Men15060%
Chronic conditions among Dr. Haman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol72%
- Arthritis41%
- Ischemic heart disease34%
- Diabetes29%
- Chronic kidney disease26%
- Anxiety23%
- Atrial fibrillation22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Haman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women37%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Haman wrote 11,783 Medicare Part D claims in 2024
In 2024, Dr. Haman wrote 11,783 Medicare Part D claims for 1,083 patients. 86% of them were for generic drugs. CMS names the drug for 11,020 of them, across 164 drugs with 11 or more claims each, at $1,226,834 in total drug cost. In 2023, CMS named 8,732 claims across 150 drugs.
Dr. Haman's Part D claims by kind of drug, 2024
- Generic10,121 claims86%
- Brand-name1,552 claims13%
- Other110 claims1%
Dr. Haman's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Haman's Part D claims, 2024
- Opioids2%257 of 11,783 claims
- Antibiotics1%109 of 11,783 claims
- Antipsychotics, patients 65 and over0%23 of 11,783 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,7322024: 11,02026%
Drugs named by CMS: 164 in 2024, 150 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory Haman scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Haman for performance year 2024, reported through an alternative payment model (APM). Dr. Haman accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Haman as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Haman's MIPS scores, performance year 2024
- 94of 100Final score
- 83.4of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gregory Haman graduated from Harvard Medical School
Dr. Haman graduated from Harvard Medical School in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Haman's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory Haman
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory Haman's NPI number?
Dr. Gregory Haman's NPI number is 1033590773. It was assigned on June 17, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Haman?
Dr. Gregory Haman is an internist in Willimantic, Connecticut. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregory Haman practice?
Dr. Haman practices at 5 Founders St, Willimantic, CT 06226. Dr. Haman's primary practice is Hartford Healthcare Cancer Institute - HOPD in Willimantic, Connecticut. Dmand AI also links Dr. Haman to 2 hospitals, 4 medical groups, 3 group practices and clinics and 1 home health agency.
What is Dr. Gregory Haman's medical license number?
Dr. Haman holds Connecticut license 65062, one of the licenses on file in 2 states.
Which states has Dr. Gregory Haman been licensed in?
Dmand AI has state licenses on file for Dr. Haman in Connecticut and Illinois.
Which hospitals is Dr. Gregory Haman affiliated with?
Dr. Haman is affiliated with Windham Hospital. Dmand AI links Dr. Haman to 2 more hospitals.
What medical group is Dr. Gregory Haman part of?
Dr. Haman is linked to Hartford HealthCare Medical Group. Dmand AI links Dr. Haman to 4 more medical groups.
Does Dr. Gregory Haman accept Medicare?
Yes. CMS data shows Dr. Haman billed Medicare for 1,026 services in 2024, and Dr. Haman accepts Medicare assignment.
Does Dr. Gregory Haman offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Haman as offering telehealth services.
What is Dr. Gregory Haman's MIPS score?
Dr. Haman's MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).
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How many Medicare patients does Dr. Gregory Haman see?
CMS counts 251 Medicare patients who saw Dr. Haman in 2024, with an average age of 75.
What services does Dr. Gregory Haman bill to Medicare?
In 2024, Dr. Haman's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and lab and pathology test (83036).
Where did Dr. Gregory Haman go to medical school?
Dr. Haman graduated from Harvard Medical School in 2015.
What drugs does Dr. Gregory Haman prescribe most?
In 2024 Medicare Part D data, Dr. Haman's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
How long has Dr. Gregory Haman been practicing?
Dr. Haman graduated from medical school in 2015, 11 years ago.
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