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

Michael L Mahacek, MD

Individual provider Radiation Oncology Physician · NPI 1922021484

Michael L Mahacek, MD is a Radiation Oncology in Grand Rapids, Michigan. Graduated from Michigan State University College of Human Medicine in 1988, 38 years ago. Practices with Radiation Oncology Centers PC, a 9-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
38
Trained at
Michigan State University College of Human Medicine
Licensed in
MI
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

100 Michigan St NE
Grand Rapids, MI 49503-2560
Phone: (616) 391-1830
Fax: (616) 391-1286
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 145 Michigan St Ne Ste 1100, Grand Rapids, MI 49503-2562 — (616) 486-5750

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 053126 (MI)

Record details

NPI number1922021484
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESDecember 9, 2025
Certification dateDecember 9, 2025

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF HUMAN MEDICINE
Graduated 1988 (38 years in practice)
Group practice Radiation Oncology Centers Pc — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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