Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Edmund Prominski, MD

Individual provider Diagnostic Radiology Physician · NPI 1699749788

Dr. William Edmund Prominski, MD practises Diagnostic Radiology in Washington, District of Columbia. Graduated from Georgetown University School of Medicine in 1983, 43 years ago. Practices with Blackwell Physicians, LLC, a 67-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in District of Columbia, Maryland and Virginia.

Years since qualifying
43
Trained at
Georgetown University School of Medicine
Licensed in
DC, MD, VA
In the registry since
2006
Specialties on file
3
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

5255 Loughboro Rd NW
Washington, DC 20016-2633
Phone: (202) 537-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 8600 Old Georgetown Rd, Bethesda, MD 20814-1422 — (301) 896-3100
  • 1610 Fielding Lewis Way, Mc Lean, VA 22101-3246 — (952) 595-1100

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence MD045791 (DC)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence D0040432 (MD)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 0101041171 (VA)

Record details

NPI number1699749788
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 15, 2006
Last updated in NPPESJuly 6, 2026
Certification dateJuly 6, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1983 (43 years in practice)
Group practice Blackwell Physicians, Llc — 67 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 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 patients1,383
Services billed 1,824 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

  • Adventist Healthcare Fort Washington Medical Ctr Hospital · Fort Washington, MD · listed as Adventist Healthcare Fort Washington Medical Center Inc
  • Adventist Healthcare Shady Grove Medical Center Hospital · Rockville, MD
  • Adventist Healthcare White Oak Medical Center Hospital · Silver Spring, MD

Colleagues at Blackwell Physicians, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 67 clinicians in the practice; 12 are shown here.

Other providers in Washington