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

Adam Nishimura, MDMS

Individual provider Family Medicine Physician · NPI 1699172163

Adam Nishimura, MDMS is registered under Family Practice in Mill Creek, Washington. Graduated from University of Washington School of Medicine in 2019, 7 years ago. Practices with Optum Care Washington PLLC, a 685-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
7
Trained at
University of Washington School of Medicine
Licensed in
WA
In the registry since
2014
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

15418 Main St
Mill Creek, WA 98012-9030
Phone: (425) 225-8000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 126 Auburn Ave, Auburn, WA 98002-5057 — (253) 735-0166
  • 219 State Ave N Ste 100, Kent, WA 98030-4543 — (253) 372-3602
  • 9709 3rd Ave Ne, Seattle, WA 98115-2062 — (206) 525-5777

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD60880471 (WA)

Record details

NPI number1699172163
Entity typeIndividual (Type 1)
GenderMale
Credentials MDMS
Sole proprietorNo
NPI enumeratedNovember 29, 2014
Last updated in NPPESJuly 24, 2026
Certification dateJuly 24, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice Optum Care Washington Pllc — 685 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients57
Services billed 89 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.

  • Yukon Kuskokwim Delta Reg Hospital Hospital · Bethel, AK

Colleagues at Optum Care Washington PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 685 clinicians in the practice; 12 are shown here.

Other providers in Mill Creek