Diagnostic Radiologists in Washington
Data updated monthly · Last refresh October 2026
1,038 Diagnostic Radiology providers practice in Washington, including 5 (0%) 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.
1,038providers
5telehealth
Seattletop city
Diagnostic Radiology by city in Washington
Choose a city to see providers there.
Where Diagnostic Radiologists in Washington practice
From CMS Medicare enrollment records covering 600 of the 1,038 providers listed here (58%). Providers who do not bill Medicare are not included in these figures.
2%solo or small practice (under 10 clinicians)
14%mid-size group (10 to 99)
84%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Diagnostic Radiologists | All clinicians in group | Main city |
| The Association of University Physicians | 106 | 3,484 | Seattle |
| Radia Inc. P S | 102 | 275 | Kirkland |
| Inland Imaging LLC | 84 | 128 | Spokane |
| Integra Imaging Ps | 84 | 126 | Spokane |
| Inland Imaging Associates Ps | 78 | 124 | Seattle |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Diagnostic Radiologists affiliated |
| Tacoma General Allenmore Hospital | Tacoma | Nonprofit | 2 of 5 | 97 |
| University of Washington Medical Ctr | Seattle | Government | 4 of 5 | 96 |
| Kadlec Regional Medical Center | Richland | Nonprofit | 4 of 5 | 76 |
| Harborview Medical Center | Seattle | Government | 2 of 5 | 75 |
| Prov Sacred Hrt Med Ctr & Childs Hosp. | Spokane | Nonprofit | 3 of 5 | 64 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Diagnostic Radiology 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. Dennis Oconnell, MDAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Joseph Stengel, DOAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Loren Laybourn, MDAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Michael Cagan, MDAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Ryan Farrer, DOAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Thomas Rowley, MDAberdeen, WA · No drug or device payments recorded (2025) ·
(360) 533-0400 Dr. Kristin Grant, M.D.Arlington, WA · No drug or device payments recorded (2025) ·
(360) 618-7614 Dr. Ross Hartling, M.D.Arlington, WA · No drug or device payments recorded (2025) ·
(425) 649-7540 Dr. Michael Ulissey, MDAuburn, WA · No drug or device payments recorded (2025) ·
(253) 735-1991 Dr. Andrew Litt, M.D.Bainbridge Island, WA · No drug or device payments recorded (2025) ·
(917) 613-4536 Dr. Rush Youngberg, M.D.Belfair, WA · No drug or device payments recorded (2025) ·
(360) 277-4171 Dr. Andrew Bronstein, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1150 Dr. Brian Jacobs, MDBellevue, WA · No drug or device payments recorded (2025) ·
(425) 454-1700 Dr. Bryan Leyton, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 467-4053 Dr. Calixto Dimas, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1150 Dr. Esther Argenyi, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. Gary Reeves, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. James Tomich, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. Joseph Duffy, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. Justin Yoon, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(206) 310-7710 Dr. Marita Acheson, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 688-5985 Dr. Nicholas Galloway, MDBellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. Randall Petersen, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Ranjeet Singh, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Robert Liddell, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Shane Macaulay, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Stacie Mars, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Thomas Sullivan, M.D.Bellevue, WA · No drug or device payments recorded (2025) ·
(425) 250-1145 Dr. Uhng-kyu Shim, MDBellevue, WA · No drug or device payments recorded (2025) ·
(425) 502-3000 Dr. Charles Ariz, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 733-0430 Dr. Dag Jensen, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. David Ashley, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. David Cahalan, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Donald Barnett, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Elin Angeid-backman, MDBellingham, WA · No drug or device payments recorded (2025) ·
(509) 993-7001 Dr. Gita Rabbani, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 733-0430 Dr. Gregery Kienzle, M.D.Bellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Jason Stoane, MDBellingham, WA · $18 in drug and device payments (2025) ·
(360) 734-5400 Dr. Jonathan Franklin, MDBellingham, WA · $32 in drug and device payments (2025) ·
(360) 734-5400 Dr. Kai-ling Ng, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 733-0430 Dr. Kenneth Carpenter, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Lars Crabo, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Laura Backer, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Matthew Studley, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 733-0430 Dr. Michael Smith, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 733-0430 Dr. Peter Buetow, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Richard Kelly, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Richard Vankolken, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Robert Hughes, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-5400 Dr. Shannon St. Clair, MDBellingham, WA · No drug or device payments recorded (2025) ·
(833) 228-6889 Common questions
How many Diagnostic Radiology providers are in Washington?There are 1,038 Diagnostic Radiology providers with active NPI records practicing in Washington, according to federal NPPES data refreshed monthly.
Do Diagnostic Radiology providers in Washington offer telehealth?Yes. 5 of the 1,038 Diagnostic Radiology providers in Washington (about 0%) report offering telehealth services in CMS data.
Which cities in Washington have the most Diagnostic Radiology providers?Seattle (340), Tacoma (138), Lynnwood (118) have the highest concentration of Diagnostic Radiology providers in Washington.
How many Diagnostic Radiology providers in Washington received drug or device company payments?145 of 1,038 Diagnostic Radiology providers in Washington (14%) 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 Diagnostic Radiologists in Washington work in independent practices or large health systems?Among 600 Diagnostic Radiologists in Washington enrolled in Medicare, 2% bill through a solo or small practice with fewer than 10 clinicians, 14% through a mid-size group of 10 to 99, and 84% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Diagnostic Radiologists in Washington work at?According to CMS facility affiliation records, the Washington hospitals where the most Diagnostic Radiologists hold privileges are Tacoma General Allenmore Hospital in Tacoma; University of Washington Medical Ctr in Seattle; Kadlec Regional Medical Center in Richland.
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