Quick answers
- Does John P. Mastandrea accept Medicare assignment?
- Yes. Medicare's clinician data says John P. Mastandrea accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John P. Mastandrea see?
- In 2024, CMS data shows 468 Original Medicare patients and 5,532 services for John P. Mastandrea. This counts Original Medicare only and measures volume, not quality.
- What is John P. Mastandrea's NPI number?
- 1518999697. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John P. Mastandrea, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 468 |
|---|---|
| Services billed to Medicare | 5,532 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Ct guidance for insertion of radiation therapy fields (77014)2,739 services
- Radiation treatment management, 5 treatment sessions (77427)581 services
- Calculation of radiation therapy dose (77300)485 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)352 services
- Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)235 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- Arthritis37%
- Diabetes34%
- Chronic kidney disease28%
Hospitals where John P. Mastandrea works
Medicare's Facility Affiliation Data lists John P. Mastandrea at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Prisma Health BaptistColumbia, SC · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 420086
- Prisma Health Richland HospitalColumbia, SC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 420018
- University of MD Shore Medical Center at ChestertownChestertown, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210030
- University of MD Shore Medical Center at EastonEaston, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 210037
Practice locations
Addresses where John P. Mastandrea is enrolled with Medicare (CMS data updated October 2, 2026).
- 7 Richland Medical Park Dr, Suite 104Columbia, SC 29203 (803) 434‑6105
Group practices
Medicare enrollment lists John P. Mastandrea as a member of this group (CMS data updated October 2, 2026).
- Prisma Health Medical Group-Midlands1,068 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Columbia
Clinicians with the same Medicare primary specialty in Columbia, SC — not a recommendation.
Other clinicians in Prisma Health Medical Group-Midlands
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518999697 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians