Dr. Lawrence B. Marks, M.D.
Radiation Oncology (Radiation Oncology Physician)
- Medicare participating
At a glance
- Medical school
- University of Rochester School of Medicine and Dentistry (1985)
- Years since graduation
- 41
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 100
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1985Medical school: University of Rochester School of Medicine and Dentistry
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Radiation Oncology Physician primary
NC license 37892
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Unc Hospitals Chapel Hill, NC
Medical groups
- University of North Carolina at Chapel Hill (2,052 clinicians)
- Johnston Radiation Oncology LLC (17 clinicians)
- Smithfield Radiation Oncology LLC (16 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 100
- Services billed
- 168
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Ct guidance for insertion of radiation therapy fields | 27 | 25 |
| Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session | 20 | 17 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $147 in total to this clinician.
| Janssen Biotech, Inc. | $147 |
|---|
| Food and Beverage | $147 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.