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

Isaac Anton Fonken, MD

Individual provider Family Medicine Physician · NPI 1538665542

Isaac Anton Fonken, MD is a Family Practice in Tacoma, Washington. Graduated from University of Colorado School of Medicine, Aurora in 2018, 8 years ago. Practices with Multicare Health System, a 2,302-clinician group and accepts Medicare assignment. Licensed in Montana and Washington.

Years since qualifying
8
Trained at
University of Colorado School of Medicine, Aurora
Licensed in
MT, WA
In the registry since
2018
Specialties on file
2
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

1112 6th Ave 3-TFM
Tacoma, WA 98405-4040
Phone: (253) 792-6680
Fax: (253) 403-2915
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MD.MD.61669853 (WA)
Family Medicine Physician Taxonomy 207Q00000X · Licence 101180 (MT)

Record details

NPI number1538665542
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 30, 2018
Last updated in NPPESSeptember 4, 2025
Certification dateSeptember 4, 2025

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF COLORADO SCHOOL OF MEDICINE, AURORA
Graduated 2018 (8 years in practice)
Group practice Multicare Health System — 2302 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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