Mark Sittig, MD
NPI 1275951519ActiveIndividual· Radiology, Radiation Oncology· Nashville, TN
Radiology, Radiation Oncology (MD) in Nashville, Tennessee, trained at Tulane University School of Medicine (class of 2014). 227 Medicare patients in 2024, $747,915 paid; nearly all of their 136 Part D prescriptions were generic (99%). Bioprotect Medical, Inc. was the largest of 5 companies reporting payments in 2025, $499.06 in all, mostly food and beverage.
Overview
| NPI | 1275951519 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 3, 2014 |
| Last updated in NPPES | Feb 25, 2026 |
| Certified by provider | Feb 25, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 59257 | TN |
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 - Radiation Oncology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 227 |
|---|---|
| Services billed | 5,142 across 44 procedure codes |
| Paid by Medicare | $747,915 |
Part D prescriptions in 2024
| Prescriptions (claims) | 136 · 209 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $1,971 |
| Generic share | 99% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Radiation Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Tennessee Oncology PLLCNashville, TN · 358 clinicians
- Urology Associates PCNashville, TN · 42 clinicians
- Lebanon Radiation Oncology Center, LLCLebanon, TN · 12 clinicians
Hospital affiliations
- Ascension Saint Thomas HospitalNashville, TN
- Vanderbilt University Medical CenterNashville, TN
Industry payments (Open Payments)
- 2025$499.06 · 6 payments from 5 companies
- 2024$711.47 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bioprotect Medical, Inc. | $166.52 | 1 |
| Janssen Scientific Affairs, LLC | $143.22 | 1 |
| Merck Sharp & Dohme LLC | $125.02 | 1 |
| Novartis Pharmaceuticals Corporation | $47.09 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $17.21 | 1 |
What the 2025 payments were for
- Food and Beverage$499.06 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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