Irina G. Rosewater, M.D.
NPI 1477793529ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· New Haven, CT
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in New Haven, Connecticut, trained at Jefferson Medical College of Thomas Jefferson University (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $3,024,020 for 6,468 claims, against $117,850 paid for services in 2024. Insulet Corporation was the largest of 22 companies reporting payments in 2025, $1,135 in all, mostly food and beverage.
Overview
| NPI | 1477793529 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 3, 2009 |
| Last updated in NPPES | Nov 16, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 044226 | 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 - Endocrinology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 389 |
|---|---|
| Services billed | 3,279 across 18 procedure codes |
| Paid by Medicare | $117,850 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,468 · 16,009 30-day fills |
|---|---|
| Patients | 886 |
| Total drug cost | $3,024,020 |
| Generic share | 51% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- Endocrine Assoc of CT LLCHamden, CT · 10 clinicians
Hospital affiliations
- Bridgeport HospitalBridgeport, CT
- Yale-New Haven HospitalNew Haven, CT
Industry payments (Open Payments)
- 2025$1,135 · 48 payments from 22 companies
- 2024$623.18 · 34 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Insulet Corporation | $189.56 | 7 |
| Novo Nordisk Inc | $134.72 | 8 |
| Lilly USA, LLC | $134.56 | 7 |
| Ascendis Pharma Endocrinology Inc | $93.82 | 1 |
| Abbott Laboratories | $72.92 | 3 |
What the 2025 payments were for
- Food and Beverage$1,128 · 47 payments
- Education$6.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other endocrinologists in New Haven
- 1073598538
- 1083709463
- 1083844732
- 1093851321
- 1205120490
- 1437320959
- 1457451015
- 1518957067
- 1639201650
- 1659417889
- 1740412675
- 1750355137
All 47 endocrinologists in New Haven · All endocrinologists in Connecticut