Susan Catherine Erk, DO
NPI 1477520203ActiveIndividual· Obstetrics & Gynecology· Williamsville, NY
Obstetrics & Gynecology (DO) in Williamsville, New York, trained at Des Moines University of Osteopathic Medicine and Health Sciences (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $76,477 for 611 claims, against $8,653 paid for services in 2024. Sumitomo Pharma America, Inc. was the largest of 20 companies reporting payments in 2025, $1,208 in all, mostly food and beverage.
Overview
| NPI | 1477520203 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Mar 1, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 181548 | NY |
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 - Obstetrics/Gynecology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 97 |
|---|---|
| Services billed | 189 across 14 procedure codes |
| Paid by Medicare | $8,653 |
Part D prescriptions in 2024
| Prescriptions (claims) | 611 · 1,253 30-day fills |
|---|---|
| Patients | 252 |
| Total drug cost | $76,477 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Des Moines University of Osteopathic Medicine and Health Sciences |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Obstetrics/Gynecology |
Medical group
- General Physician PCAmherst, NY · 501 clinicians
Hospital affiliation
- Kaleida HealthBuffalo, NY
Industry payments (Open Payments)
- 2025$1,208 · 63 payments from 20 companies
- 2024$1,227 · 63 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sumitomo Pharma America, Inc. | $178.72 | 11 |
| Millicent US Inc | $135.82 | 9 |
| Biogen, Inc. | $112.43 | 5 |
| Mayne Pharma Commercial LLC | $109.86 | 7 |
| Organon LLC | $77.65 | 4 |
What the 2025 payments were for
- Food and Beverage$1,163 · 62 payments
- Education$45.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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