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

Dr. Johan K. Ahn, MD

Individual provider Diagnostic Radiology Physician · NPI 1972546240

Dr. Johan K. Ahn, MD practises Diagnostic Radiology in Tacoma, Washington. Graduated from New York Medical College in 1995, 31 years ago. Practices with Queens University Medical Group, a 623-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California, Hawaii, Illinois and Oregon and 1 more.

Years since qualifying
31
Trained at
New York Medical College
Licensed in
CA, HI, IL, OR, WA
In the registry since
2006
Specialties on file
5
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

1304 Fawcett Ave Ste 100
Tacoma, WA 98402-1900
Phone: (253) 761-4200
Fax: (253) 761-4201
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1301 Punchbowl St, Honolulu, HI 96813-2499 — (808) 691-1000
  • 4500 Memorial Dr, Belleville, IL 62226-5360 — (314) 362-7200

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A84698 (CA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence MD-9933 (HI)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 036180646 (IL)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence MD00042505 (WA)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence MD151077 (OR)

Record details

NPI number1972546240
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2006
Last updated in NPPESOctober 7, 2026
Certification dateOctober 7, 2026

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1995 (31 years in practice)
Group practice Queens University Medical Group — 623 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations10 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 patients2,074
Services billed 2,832 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Colleagues at Queens University Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 623 clinicians in the practice; 12 are shown here.

Other providers in Tacoma