Mark J. Hornyak, M.D.
NPI 1124226394ActiveIndividual· Neurological Surgery· Cooperstown, NY
Neurological Surgery (M.D.) in Cooperstown, New York, trained at University of Maryland School of Medicine (class of 2000). Mostly services rather than prescriptions: Medicare paid $51,932 for 110 patients in 2024, with only 48 Part D claims. Centinel Spine, LLC was the largest of 23 companies reporting payments in 2025, $1,301 in all, mostly food and beverage.
Overview
| NPI | 1124226394 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 10, 2007 |
| Last updated in NPPES | Feb 13, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | 62295 | CT |
| Neurological Surgery | 207T00000X | 4301090199 | MI |
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 - Neurology (CT); Practitioner - Neurosurgery (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 110 |
|---|---|
| Services billed | 203 across 34 procedure codes |
| Paid by Medicare | $51,932 |
Part D prescriptions in 2024
| Prescriptions (claims) | 48 · 50 30-day fills |
|---|---|
| Patients | 32 |
| Total drug cost | $362.66 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- Hartford Healthcare Medical Group Specialists PLLCBridgeport, CT · 1,588 clinicians
Hospital affiliation
- William W Backus HospitalNorwich, CT
Other facilities
- Hartford Healthcare at HomeHome health agency · East Hartford, CT
Industry payments (Open Payments)
- 2025$1,301 · 52 payments from 23 companies
- 2024$1,656 · 52 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Centinel Spine, LLC | $188.28 | 3 |
| Emd Serono, Inc. | $171.68 | 8 |
| Biogen, Inc. | $150.05 | 7 |
| Abbvie Inc. | $145.60 | 8 |
| Xtant Medical Inc | $98.89 | 1 |
What the 2025 payments were for
- Food and Beverage$1,301 · 52 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Neurological Surgery providers in Cooperstown
- 1306882279
- 1538927397
- 1154324135