Clinical Pathologists (Laboratory Medicine) in Washington
Data updated monthly · Last refresh October 2026
58 Clinical Pathology/Laboratory Medicine providers practice in Washington. 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.
58providers
Seattletop city
Clinical Pathology/Laboratory Medicine by city in Washington
Choose a city to see providers there.
Where Clinical Pathologists (Laboratory Medicine) in Washington practice
From CMS Medicare enrollment records covering 21 of the 58 providers listed here (36%). Providers who do not bill Medicare are not included in these figures.
Largest practice groups
| Group (as registered with Medicare) | Clinical Pathologists (Laboratory Medicine) | All clinicians in group | Main city |
| The Association of University Physicians | 8 | 3,484 | Seattle |
| Virginia Mason Medical Center | 4 | 867 | Seattle |
| Central Washington Health Services Association | 3 | 708 | Wenatchee |
| Cellnetix Pathology PLLC | 2 | 58 | Seattle |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Clinical Pathologists (Laboratory Medicine) affiliated |
| University of Washington Medical Ctr | Seattle | Government | 4 of 5 | 9 |
| Harborview Medical Center | Seattle | Government | 2 of 5 | 8 |
| Virginia Mason Medical Center | Seattle | Nonprofit | 5 of 5 | 4 |
| Evergreenhealth Medical Center | Kirkland | Government | 5 of 5 | 4 |
| Lake Chelan Community Hospital | Chelan | Government | Not rated | 3 |
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.
Clinical Pathology/Laboratory Medicine 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. Debra Callahan, MDBellingham, WA · No drug or device payments recorded (2025) ·
(360) 734-2800 Dr. Garrett Alcorn, MDBurien, WA · No drug or device payments recorded (2025) ·
(206) 431-5221 Dr. Kindred Ritchie, MDBurien, WA · No drug or device payments recorded (2025) ·
(206) 431-5221 Dr. Thomas Dean, MDBurien, WA · No drug or device payments recorded (2025) ·
(206) 431-5221 Dr. David Sherer, M.D.Clyde Hill, WA · No drug or device payments recorded (2025) ·
(425) 260-6868 Dr. Frank Brown, MDOlympia, WA · No drug or device payments recorded (2025) ·
(360) 413-8250 Dr. Alexander Greninger, M.D.Seattle, WA · $3,257 in drug and device payments (2025) ·
(206) 520-5700 Dr. Ashley Eckel, M.D. PH.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 616-9343 Dr. Brad CooksonSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Brent WoodSeattle, WA · $31,477 in drug and device payments (2025) ·
(206) 598-6131 Dr. Charles Simrell, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 365-5171 Dr. Christopher Gault, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6861 Dr. Cristina Figueroa Villalba, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 987-2000 Dr. Daniel SabathSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. David ChouSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. David GretchSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Denise Wells, MDSeattle, WA · No drug or device payments recorded (2025) ·
(800) 860-0934 Dr. Donald Guinee, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6600 Dr. Emily HelmSeattle, WA · No drug or device payments recorded (2025) ·
(206) 543-1140 Dr. Feras Ally, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Geoffrey Baird, MD, PHDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 744-9787 Dr. Giannoula Tansarli, MD, PHDSeattle, WA · No drug or device payments recorded (2025) ·
(401) 400-9118 Dr. He Fang, PHDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Hejin Hahn, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6861 Dr. Jacob Abel, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Jonathan TaitSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Joshua Lieberman, M.D., PH.D. Dr. Keith JeromeSeattle, WA · No drug or device payments recorded (2025) ·
(206) 288-1000 Dr. Maria Desouza, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 365-5171 Dr. Maria TretiakovaSeattle, WA · $730 in drug and device payments (2025) ·
(206) 744-3145 Dr. Marla Fenske, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6600 Dr. Michael AstionSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Mohammadreza Pakyari, M.D., PH.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Niklas Krumm, MD/PHDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 616-9343 Dr. Noah Hoffman, MD, PHDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-7932 Dr. Patrick Mathias, M.D., PH.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 616-1836 Dr. Petrie RaineySeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Rebecca Treger, MD, PHDSeattle, WA · No drug or device payments recorded (2025) ·
(541) 941-4865 Dr. Runjun Kumar, MDSeattle, WA · $532 in drug and device payments (2025) ·
(206) 520-5000 Dr. Sean Murphy, MD PHDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. Semra Olgac, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6600 Dr. Susan Detweiler, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5307 Dr. Susan Fink, M.D., PH.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6400 Dr. Thomas Ma, MDSeattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Thomas Rogers, DO MPHSeattle, WA · No drug or device payments recorded (2025) ·
(206) 223-6861 Dr. Wayne ChandlerSeattle, WA · No drug or device payments recorded (2025) ·
(206) 598-6131 Dr. William Phipps, M.D.Seattle, WA · No drug or device payments recorded (2025) ·
(206) 520-5000 Dr. Francisco Velazquez, MDSpokane, WA · No drug or device payments recorded (2025) ·
(509) 324-4199 Common questions
How many Clinical Pathology/Laboratory Medicine providers are in Washington?There are 58 Clinical Pathology/Laboratory Medicine providers with active NPI records practicing in Washington, according to federal NPPES data refreshed monthly.
Which cities in Washington have the most Clinical Pathology/Laboratory Medicine providers?Seattle (42), Spokane (4), Burien (3) have the highest concentration of Clinical Pathology/Laboratory Medicine providers in Washington.
How many Clinical Pathology/Laboratory Medicine providers in Washington received drug or device company payments?7 of 58 Clinical Pathology/Laboratory Medicine providers in Washington (12%) 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.
Which hospitals do Clinical Pathologists (Laboratory Medicine) in Washington work at?According to CMS facility affiliation records, the Washington hospitals where the most Clinical Pathologists (Laboratory Medicine) hold privileges are University of Washington Medical Ctr in Seattle; Harborview Medical Center in Seattle; Virginia Mason Medical Center in Seattle.
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