Radiation Oncologists in Washington
Data updated monthly · Last refresh October 2026
200 Radiation Oncology providers practice in Washington, including 80 (40%) offering telehealth. The largest concentration is in Seattle. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
200providers
80telehealth
Seattletop city
Radiation Oncology by city in Washington
Choose a city to see providers there.
Radiation Oncology providers in Washington
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Kent Wallner, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 768-5356 Dr. Kylie Kang, MDSeattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 520-5000 Dr. Lawrence MulkerinSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4000 Dr. Lia Halasz, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 598-4100 Dr. Li-ming Fang, MDSeattle, WA · $112 in drug and device payments (2025) ·
(206) 543-0065 Dr. Lisa Ni, MDSeattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 520-5000 Dr. Loise Wairiri, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4817 Dr. Mari TokitaSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4100 Dr. Mark GroudineSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4100 Dr. Michael Cheung, M.D.Seattle, WA · $133 in drug and device payments (2025) ·
(206) 598-4100 Dr. Michael Folkert, M.D., PH.D.Seattle, WA · $196 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Michael Hunter, MDSeattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 223-6600 Dr. Muneeb Niazi, DOSeattle, WA · $29 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Neil Panjwani, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 520-5000 Dr. Nina Mayr, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4110 Dr. Omar Mian, MD, PHDSeattle, WA · $192 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Paul Herstein, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 326-3490 Dr. Paul Riviere, MDSeattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 520-5000 Dr. Pete Yeh, MDSeattle, WA · $193 in drug and device payments (2025) ·
(206) 598-4100 Dr. Ralph Ermoian, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4100 Dr. Ramesh Rengan, MD. PHDSeattle, WA · $4,372 in drug and device payments (2025) · Telehealth ·
(206) 306-2804 Dr. Reith Sarkar, MDSeattle, WA · $260 in drug and device payments (2025) · Telehealth ·
(206) 215-2323 Dr. Richard Hsi, MDSeattle, WA · $1,930 in drug and device payments (2025) · Telehealth ·
(206) 223-6600 Dr. Robert Meier, M.D.Seattle, WA · $128 in drug and device payments (2025) · Telehealth ·
(206) 386-6707 Dr. Saif Aljabab, MBBSSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-5825 Dr. Sandra Vermeulen, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 320-7130 Dr. Sara Hardy, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(065) 205-0002 Dr. Shannon Fogh, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 520-5000 Dr. Shauna Mcvorran, MDSeattle, WA · $565 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Shilpen Patel, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4100 Dr. Simon Lo, M.D.Seattle, WA · No drug or device payments recorded (2025) · Telehealth ·
(206) 598-4100 Dr. Smith Apisarnthanarax, MDSeattle, WA · $83 in drug and device payments (2025) · Telehealth ·
(206) 306-2804 Dr. Stephanie Schaub, M.D.Seattle, WA · $127 in drug and device payments (2025) · Telehealth ·
(206) 598-4100 Dr. Steve Eulau, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 386-2323 Dr. Sudershan Bhatia, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Thomas GriffinSeattle, WA · No drug or device payments recorded (2025) ·
(206) 322-6742 Dr. Tim Mate, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 386-2198 Dr. Ting Martin Ma, MD, PH.D.Seattle, WA · $889 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Todd Barnett, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 386-2323 Dr. Tracy Sherertz, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 326-3000 Dr. Tru-khang Dinh, M.D.Seattle, WA · $360 in drug and device payments (2025) ·
(206) 543-3605 Dr. Upendra Parvathaneni, MBBSSeattle, WA · $193 in drug and device payments (2025) ·
(206) 598-4100 Dr. Vivek Mehta, M.D.Seattle, WA · $127 in drug and device payments (2025) · Telehealth ·
(206) 386-2323 Dr. Waylene Swensen, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 368-5800 Dr. Winston Vuong, MDSeattle, WA · $63 in drug and device payments (2025) · Telehealth ·
(206) 520-5000 Dr. Wui-jin Koh, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4100 Dr. Yilan LiuSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-4121 Common questions
How many Radiation Oncology providers are in Washington?There are 200 Radiation Oncology providers with active NPI records practicing in Washington, according to federal NPPES data refreshed monthly.
Do Radiation Oncology providers in Washington offer telehealth?Yes. 80 of the 200 Radiation Oncology providers in Washington (about 40%) report offering telehealth services in CMS data.
Which cities in Washington have the most Radiation Oncology providers?Seattle (97), Tacoma (10), Vancouver (8) have the highest concentration of Radiation Oncology providers in Washington.
How many Radiation Oncology providers in Washington received drug or device company payments?89 of 200 Radiation Oncology providers in Washington (45%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Radiation Oncologists in Washington work in independent practices or large health systems?Among 128 Radiation Oncologists in Washington enrolled in Medicare, 18% bill through a solo or small practice with fewer than 10 clinicians, 18% through a mid-size group of 10 to 99, and 64% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Radiation Oncologists in Washington work at?According to CMS facility affiliation records, the Washington hospitals where the most Radiation Oncologists hold privileges are University of Washington Medical Ctr in Seattle; Swedish Medical Center in Seattle; Tacoma General Allenmore Hospital in Tacoma.
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