NPPES file of Aug 9, 2026

Radiation Oncology Physician in Oklahoma

56 NPPES records list radiation oncology physician with a practice address in Oklahoma, 1.4 per 100,000 residents, the 48th highest rate of 51. Oklahoma City and Tulsa have the most; each record links to the provider's NPI and the Oklahoma license search. Page 2 of 2.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 2085R0001X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Oklahoma City has the most, 36

  1. Oklahoma City36
  2. Tulsa11
  3. Lawton3
  4. Bartlesville1
  5. Claremore1

Radiation Oncology Physician records in Oklahoma

  1. Frederick Willison, MDTulsa, OK 741041932177011
  2. Janice Witt, MDEdmond, OK 730131407927213
  3. Van Woo, MDOklahoma City, OK 731121578502324
  4. Leslie Yonemoto, M.D.Oklahoma City, OK 731421336235456
  5. Marianne Young, M.D.Oklahoma City, OK 731021427055169
  6. James Ziegler, M.D.Lawton, OK 735051689692725

Source: CMS NPPES, primary taxonomy 2085R0001X: records by practice city and the list of records, file of Aug 9, 2026.

Oklahoma ranks 48 of 51 per resident

  1. Louisiana1.4
  2. Nevada1.4
  3. Mississippi1.4
  4. Oklahoma1.4
  5. Idaho1.3
  6. New Mexico1.2
  7. 50 states and D.C.2.1

Source: CMS NPPES, primary taxonomy 2085R0001X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

69.6% of these records appear in a Medicare file, against 82.3% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. Oklahoma69.6%
  2. United States82.3%

Radiation Oncology Physician records in Oklahoma, measured

  • In a Medicare file39 of 56 · 69.6% here, 82.3% nationally
  • In the CMS Doctors and Clinicians file35 · 62.5% here, 74.0% nationally
  • Not updated in five years or more32 · 57.1% here, 54.6% nationally
  • Median graduation year1998 · the 35 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 2085R0001X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

56 NPPES records list radiation oncology physician (2085R0001X) as their primary taxonomy with a practice address in Oklahoma: 1.4 per 100,000 residents against 2.1 nationally (50 states and D.C.). Oklahoma City has 36 of them (64%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. Utah62
  2. Arkansas49
  3. Louisiana66
  4. Iowa67

States with a similar rate per 100,000

  1. Mississippi1.4
  2. Nevada1.4
  3. Texas1.5
  4. South Carolina1.5

The largest states

  1. California735
  2. Florida520
  3. New York449
  4. Texas449
  5. Pennsylvania383

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.