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

Matthew Iwamoto, MD

Individual provider Diagnostic Radiology Physician · NPI 1073547014

Matthew Iwamoto, MD practises Diagnostic Radiology in Bismarck, North Dakota. Graduated from University of California, Geffen School of Medicine in 1984, 42 years ago. Practices with Sanford Bismarck, a 561-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
42
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
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

222 N 7th St
Bismarck, ND 58501-4436 Not confirmed with CMS for 13 years — call before visiting
Phone: (701) 323-6000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence G56369 (CA)

Record details

NPI number1073547014
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2006
Last updated in NPPESFebruary 7, 2013

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1984 (42 years in practice)
Group practice Sanford Bismarck — 561 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients2,087
Services billed 3,096 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Sanford Bismarck

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 561 clinicians in the practice; 12 are shown here.

Other providers in Bismarck