Anna Petrovna Ziganshina, M.D.
NPI 1629431630ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Danbury, CT
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Prospect CT Medical Foundation Inc, practicing in Danbury, Connecticut. Their prescriptions cost Medicare Part D more than their services did: $2,214,266 for 2,979 claims, against $71,084 paid for services in 2024. Novo Nordisk Inc was the largest of 11 companies reporting payments in 2025, $1,113 in all, mostly food and beverage. Lists Saint Mary's Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1629431630 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 29, 2016 |
| Last updated in NPPES | Aug 13, 2021 |
| Certified by provider | Aug 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 67466 | CT |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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); Practitioner - Internal Medicine (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 188 |
|---|---|
| Services billed | 1,457 across 21 procedure codes |
| Paid by Medicare | $71,084 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,979 · 6,989 30-day fills |
|---|---|
| Patients | 334 |
| Total drug cost | $2,214,266 |
| Generic share | 37% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical group
- Prospect CT Medical Foundation IncManchester, CT · 282 clinicians
Hospital affiliations
- Saint Mary's HospitalWaterbury, CT
- Waterbury HospitalWaterbury, CT
- Yale-New Haven HospitalNew Haven, CT
Industry payments (Open Payments)
- 2025$1,113 · 33 payments from 11 companies
- 2024$2,596 · 123 payments from 25 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $316.64 | 15 |
| Lilly USA, LLC | $286.91 | 5 |
| Ascendis Pharma Endocrinology Inc | $179.80 | 2 |
| Xeris Pharmaceuticals, Inc. | $168.53 | 3 |
| Amgen Inc. | $43.99 | 2 |
What the 2025 payments were for
- Food and Beverage$1,106 · 32 payments
- Education$6.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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