Physician Profile
Unclaimed ProfileAbout HAMAN
Based in Willimantic, CT, Gregory Haman, M.D. is listed in the NPI registry under internal medicine. Gregory graduated from Harvard Medical School in 2015. Medicare claims data shows Gregory provided 1,026 services to 650 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (860) 423-9764
- Email not available
Practice Locations
5 FOUNDERS ST STE 100
Willimantic, CT 06226
Procedures Most Often Billed to Medicare
1,026 services · 650 patients · 13 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
41 |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
16 |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
16 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
485 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
135 |
| Hemoglobin a1c level | Lab test | 83036 |
79 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
76 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
52 |
| Administration of influenza virus vaccine | Billing code | G0008 |
44 |
| Transitional care management services for problem of high complexity | Office visit | 99496 |
25 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other internal medicines in Willimantic 7
Same specialty, same city.
Trained at Harvard Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 8
Providers in CT who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Haman?
Dr. Haman is an internal medicine in Willimantic, CT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
What is Dr. Haman's address?
Dr. Haman is listed at 5 FOUNDERS ST STE 100, Willimantic, CT 06226. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Haman?
The number on file is (860) 423-9764. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Haman?
Dr. Haman's National Provider Identifier is 1033590773. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Haman train?
Dr. Haman attended Harvard Medical School, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Haman have?
Dr. Haman has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Haman perform?
According to Medicare billing data, Dr. Haman provides treatments such as influenza vaccine split virus, preservative free and sarscv2 vac 30mcg trs-suc im, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Haman's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Haman. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.