Mark Williams, MBBS
NPI 1295178242ActiveIndividual· Anesthesiology· Rochester, NY
Anesthesiology (MBBS) with U of R Anesthesiology Group, practicing in Rochester, New York. Mostly services rather than prescriptions: Medicare paid $24,216 for 130 patients in 2024, with only 38 Part D claims. Abbott Laboratories was the largest of 4 companies reporting payments in 2025, $920.35 in all, mostly food and beverage. Lists Strong Memorial Hospital as a hospital affiliation.
Overview
| NPI | 1295178242 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MBBS |
| Sole proprietor | No |
| NPI issued | Apr 9, 2013 |
| Last updated in NPPES | Jul 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 286923 | NY |
| Physician Assistant, Medical | 363AM0700X | 286923 | NY |
| 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 - Anesthesiology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 130 |
|---|---|
| Services billed | 366 across 63 procedure codes |
| Paid by Medicare | $24,216 |
Part D prescriptions in 2024
| Prescriptions (claims) | 38 · 41 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $1,370 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Anesthesiology |
| Telehealth | Offers telehealth |
Medical group
- U of R Anesthesiology GroupRochester, NY · 347 clinicians
Hospital affiliation
- Strong Memorial HospitalRochester, NY
Industry payments (Open Payments)
- 2025$920.35 · 34 payments from 4 companies
- 2024$714.20 · 24 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $443.25 | 14 |
| Spr Therapeutics, Inc | $355.68 | 17 |
| Stryker Corporation | $60.96 | 1 |
| Boston Scientific Corporation | $60.46 | 2 |
What the 2025 payments were for
- Food and Beverage$920.35 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 280 anesthesiologists in Rochester · All anesthesiologists in New York