Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Jack Mark Fields, MD

Individual provider Diagnostic Radiology Physician · NPI 1326016379

Dr. Jack Mark Fields, MD practises Diagnostic Radiology in Olympia, Washington. Graduated from New York Medical College in 2000, 26 years ago. Practices with Radiology Associates PA, a 103-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
26
Trained at
New York Medical College
Licensed in
WA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3417 Ensign Rd NE
Olympia, WA 98506-5075
Phone: (360) 493-4600
Fax: (360) 493-4603
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 203 S Western Ave, Tonasket, WA 98855-8803 — (509) 486-2151

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence MD00045508 (WA)

Record details

NPI number1326016379
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 8, 2006
Last updated in NPPESDecember 30, 2025
Certification dateDecember 30, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 2000 (26 years in practice)
Group practice Radiology Associates Pa — 103 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations20 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients2,925
Services billed 5,925 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Swedish Medical Center Hospital · Seattle, WA
  • Asante Rogue Regional Medical Center Hospital · Medford, OR
  • Northwest Specialty Hospital Hospital · Post Falls, ID
  • Providence Santa Rosa Memorial Hospital Hospital · Santa Rosa, CA
  • Swedish Issaquah Hospital · Issaquah, WA

Colleagues at Radiology Associates PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 103 clinicians in the practice; 12 are shown here.

Other providers in Olympia