Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Stephen Andrew Mihalcik, MD, PHD

Individual provider Radiation Oncology Physician · NPI 1598031205

Stephen Andrew Mihalcik, MD, PHD is a Radiation Oncology in Boston, Massachusetts. Graduated from Mayo Medical School in 2012, 14 years ago. Practices with Illinois Proton Center LLC, a 15-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois and Massachusetts.

Years since qualifying
14
Trained at
Mayo Medical School
Licensed in
IL, MA
In the registry since
2012
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

75 Francis St
Boston, MA 02115-6110
Phone: (617) 732-6310
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 55 Fruit St, Boston, MA 02114-2696 — (617) 726-7646
  • 100 Blossom St, Boston, MA 02114-2606 — (617) 724-1548
  • 131 Old Road To 9 Acre Cor, Concord, MA 01742-4181 — (978) 287-3436

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 261508 (MA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 036142451 (IL)

Record details

NPI number1598031205
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMarch 27, 2012
Last updated in NPPESNovember 24, 2025
Certification dateNovember 24, 2025

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolMAYO MEDICAL SCHOOL
Graduated 2012 (14 years in practice)
Group practice Illinois Proton Center Llc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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