Radiation Oncology Physician
NUCC 2085R0001X · Radiology
6,141 CMS NPPES-registered providers across 53 states · 121st of 690 specialties by headcount.
Where this specialty sits in the corpus
Radiation Oncology Physician ranks 121st of 690 NUCC specialties by CMS NPPES headcount (0.08% of all registered NPIs), densest in California; per resident District of Columbia leads.
- 6,141
- NPPES providers in specialty
- 121st
- of 690 specialties
- 423
- state-share HHI
- 68.8%
- Part D prescriber share
District of Columbia is densest per capita (1.6× the national rate; Massachusetts 1.6×); 10.9% of the Radiology category.
Taxonomy fingerprint
Radiation Oncology Physician (NUCC 2085R0001X; 68.8% Part D prescribers (4,225 of 6,141); avg 135 Part D claims/prescriber (468th of 572); Open Payments avg $2K/physician (199th of 551; 2,851 paid, $5.4M total); state-share HHI 423; next-larger headcount neighbor Child & Adolescent Psychiatry Physician (+159); next-smaller Periodontics (-21)).
Next larger: Child & Adolescent Psychiatry Physician (6,300) Next smaller: Periodontics (6,120)
Population-adjusted state index
Each multiple is this specialty's providers-per-resident in a state divided by the national rate (Census Vintage population estimates). Raw headcount favors large states; this ranking surfaces denser markets.
Over-indexed vs national rate
- District of Columbia 1.6× · 2.9/100k
- Massachusetts 1.6× · 2.9/100k
- North Dakota 1.6× · 2.8/100k
- Rhode Island 1.4× · 2.6/100k
Under-indexed vs national rate
- Puerto Rico 0.29× · 0.5/100k
- New Mexico 0.57× · 1/100k
- Oklahoma 0.58× · 1.1/100k
- Wyoming 0.66× · 1.2/100k
- Idaho 0.67× · 1.2/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 643 |
| 2 | Florida | 468 |
| 3 | New York | 404 |
| 4 | Texas | 392 |
| 5 | Pennsylvania | 327 |
| 6 | Ohio | 265 |
| 7 | Illinois | 244 |
| 8 | Michigan | 211 |
| 9 | Massachusetts | 203 |
| 10 | North Carolina | 201 |
| 11 | Washington | 188 |
| 12 | Georgia | 148 |
| 13 | Arizona | 146 |
| 14 | New Jersey | 145 |
| 15 | Minnesota | 139 |
Top Cities for Radiation Oncology Physician
| # | City | Providers |
|---|---|---|
| 1 | HoustonTexas | 139 |
| 2 | New YorkNew York | 138 |
| 3 | BostonMassachusetts | 114 |
| 4 | PhiladelphiaPennsylvania | 108 |
| 5 | SeattleWashington | 93 |
| 6 | Los AngelesCalifornia | 84 |
| 7 | RochesterMinnesota | 70 |
| 8 | ChicagoIllinois | 67 |
| 9 | ColumbusOhio | 59 |
| 10 | Saint LouisMissouri | 57 |
| 11 | JacksonvilleFlorida | 52 |
| 12 | MiamiFlorida | 52 |
Sample Radiation Oncology Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Nicolaas De Wette, M.D.Portland, OR |
| 2 | Alan Slomowitz, M.D.Dallas, TX |
| 3 | David Salinger, MDMechanicsburg, PA |
| 4 | Maria Ciccia, MDHollywood, FL |
| 5 | Kristie Gast, M.D.West Plains, MO |
| 6 | Bryan Goss, MDSanta Fe, NM |
| 7 | Joel Elconin, MDElyria, OH |
| 8 | Vinay Sharma, M.D.Boca Raton, FL |
| 9 | Matthew Krasin, MDMemphis, TN |
| 10 | Srinath Sundararaman, M.D.Pembroke Pines, FL |
| 11 | Carrie Gotkowitz, M.D.Vancouver, WA |
| 12 | Bruce Nakfoor, MDNaples, FL |
| 13 | Scott Triedman, M.D.Providence, RI |
| 14 | Thomas Merchant, DOMemphis, TN |
| 15 | Gabriela Masko, M.D.Providence, RI |
| 16 | Kathy Radie Keane, M.D.Providence, RI |
| 17 | Michael Hanus, MDNaples, FL |
| 18 | Donald Joyce, M.D.Providence, RI |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Radiology category.
Compare Radiation Oncology Physician vs Diagnostic Radiology Physician →
Frequently Asked Questions
Where does the large Radiation Oncology Physician headcount concentrate?
How large is Radiation Oncology Physician's Open Payments footprint?
How heavy is Radiation Oncology Physician Part D prescribing at scale?
Data sources and methodology
Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Part D averages from the CMS Medicare Part D Prescriber PUF; industry payments from CMS Open Payments 2024. Counts reflect self-designated primary taxonomy at NPI enrollment. PlainDoctor does not rate or rank providers. Methodology · About
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-27.