Mark W. Dersch, MD
NPI 1538119151ActiveIndividual· Urology· Ocala, FL
Urology (MD) in Ocala, Florida, trained at Indiana University School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $973,474 for 4,200 claims, against $339,144 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. was the largest of 23 companies reporting payments in 2025, $2,204 in all, mostly food and beverage.
Overview
| NPI | 1538119151 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 12, 2006 |
| Last updated in NPPES | Dec 22, 2020 |
| Certified by provider | Dec 22, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | ME66575 | FL |
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 - Urology (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,034 |
|---|---|
| Services billed | 14,084 across 82 procedure codes |
| Paid by Medicare | $339,144 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,200 · 11,234 30-day fills |
|---|---|
| Patients | 1,019 |
| Total drug cost | $973,474 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Urology |
Medical group
- Advanced Urology Institute LLCSafety Harbor, FL · 144 clinicians
Hospital affiliation
- Adventhealth OcalaOcala, FL
Industry payments (Open Payments)
- 2025$2,204 · 64 payments from 23 companies
- 2024$1,716 · 69 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $273.12 | 9 |
| Procept Biorobotics Corporation | $259.52 | 2 |
| Sumitomo Pharma America, Inc. | $188.99 | 9 |
| Astellas Pharma US Inc | $178.29 | 3 |
| Janssen Biotech, Inc. | $160.72 | 8 |
What the 2025 payments were for
- Food and Beverage$2,114 · 62 payments
- Education$89.84 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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