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

Individual provider Family Medicine Physician · NPI 1891951828

Dr. Marek Marcinkiewicz, MD is registered under Family Practice in Fort Defiance, Arizona. Qualified in 1988, 38 years ago. Practices with The Fort Defiance Indian Hospital Board, Incorporation, a 146-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
38
Licensed in
WA
In the registry since
2008
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

Corner Of Route N12 And N7
Fort Defiance, AZ 86504-0649
Phone: (928) 729-8000
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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 MD60418687 (WA)

Record details

NPI number1891951828
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 30, 2008
Last updated in NPPESSeptember 16, 2026
Certification dateSeptember 15, 2026

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 1988 (38 years in practice)
Group practice The Fort Defiance Indian Hospital Board, Incorporation — 146 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 patients151
Services billed 228 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.

Colleagues at The Fort Defiance Indian Hospital Board, Incorporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 146 clinicians in the practice; 12 are shown here.

Other providers in Fort Defiance