Nicholas Junhyuk Ahn, M.D.
NPI 1912341447ActiveIndividual· Surgery· Stony Brook, NY
Surgery (M.D.) in Stony Brook, New York, trained at Pennsylvania State University College of Medicine (class of 2013). Mostly services rather than prescriptions: Medicare paid $55,092 for 152 patients in 2024, with only 34 Part D claims. Stryker Corporation was the largest of 3 companies reporting payments in 2025, $204.98 in all, mostly food and beverage.
Overview
| NPI | 1912341447 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 26, 2013 |
| Last updated in NPPES | Sep 7, 2021 |
| Certified by provider | Sep 7, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 306605 | NY |
| Student in an Organized Health Care Education/Training Program | 390200000X | 63283 | — |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Colorectal Surgery (Proctology) (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 152 |
|---|---|
| Services billed | 266 across 47 procedure codes |
| Paid by Medicare | $55,092 |
Part D prescriptions in 2024
| Prescriptions (claims) | 34 · 34 30-day fills |
|---|---|
| Patients | 26 |
| Total drug cost | $3,655 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Colorectal Surgery (Proctology) |
| Telehealth | Offers telehealth |
Medical group
- Stony Brook Surgical Associates University Faculty Practice CorporatiHampton Bays, NY · 109 clinicians
Hospital affiliation
- Suny/Stony Brook University HospitalStony Brook, NY
Other facilities
- Catholic Home CareHome health agency · Farmingdale, NY
- Personal Home Healthcare and HospiceHome health agency · Blakely, PA
- Traditional Home Health CareHome health agency · Dunmore, PA
Industry payments (Open Payments)
- 2025$204.98 · 3 payments from 3 companies
- 2024$426.60 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $147.12 | 1 |
| Virtual Incision Corporation | $44.15 | 1 |
| Novo Nordisk Inc | $13.71 | 1 |
What the 2025 payments were for
- Food and Beverage$204.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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