Dharini Sun, M.D.
NPI 1558355743ActiveIndividual· Internal Medicine· Hamden, CT
Internal Medicine (M.D.) with Hhc Physician Services PLLC, practicing in Hamden, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $993,967 for 11,581 claims, against $92,916 paid for services in 2024. Amgen Inc. was the largest of 11 companies reporting payments in 2025, $366.54 in all, mostly food and beverage. Lists Danbury Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1558355743 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 2, 2005 |
| Last updated in NPPES | Feb 27, 2024 |
| Certified by provider | Feb 27, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 39321 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CT); Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 323 |
|---|---|
| Services billed | 1,112 across 35 procedure codes |
| Paid by Medicare | $92,916 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,581 · 16,994 30-day fills |
|---|---|
| Patients | 644 |
| Total drug cost | $993,967 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Hhc Physician Services PLLCHamden, CT · 132 clinicians
Hospital affiliations
- Danbury HospitalDanbury, CT
- Griffin HospitalDerby, CT
- The Hospital of Central ConnecticutNew Britain, CT
- Yale-New Haven HospitalNew Haven, CT
Other facilities
- Hartford Healthcare at HomeHome health agency · East Hartford, CT
- Yale New Haven Health - Health at HomeHome health agency · Milford, CT
- Connecticut Hospice Inc, theHospice · Branford, CT
- Hartford Healthcare at HomeHospice · East Hartford, CT
- Apple Rehab Laurel WoodsNursing home · East Haven, CT
- Autumn Lake Healthcare at Glen HillNursing home · Danbury, CT
- Hamden Rehabilitation & Healthcare CenterNursing home · Hamden, CT
- Montowese Center for Health & RehabilitationNursing home · North Haven, CT
Industry payments (Open Payments)
- 2025$366.54 · 16 payments from 11 companies
- 2024$298.58 · 13 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $71.05 | 3 |
| Novo Nordisk Inc | $47.11 | 2 |
| Pfizer Inc. | $45.59 | 2 |
| Lilly USA, LLC | $37.89 | 2 |
| Alexion Pharmaceuticals, Inc. | $26.92 | 1 |
What the 2025 payments were for
- Food and Beverage$366.54 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 53 internal medicine physicians in Hamden · All internal medicine physicians in Connecticut