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

John M. Schallenkamp, MD

Individual provider Radiation Oncology Physician · NPI 1265455018

John M. Schallenkamp, MD is a Radiation Oncology in Billings, Montana. Graduated from Medical College of Wisconsin in 2000, 26 years ago. Practices with Memorial Hospital of Laramie County, a 49-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Colorado and Montana.

Years since qualifying
26
Trained at
Medical College of Wisconsin
Licensed in
CO, MT
In the registry since
2006
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

801 N 29th St
Billings, MT 59101-0905
Phone: (406) 238-2500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1665 Aurora Ct, Aurora, CO 80045-2517 — (720) 848-0000

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence DR.0075716 (CO)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 10809 (MT)

Record details

NPI number1265455018
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESJuly 15, 2025
Certification dateJuly 15, 2025
Mailing addressPo Box 110429, Aurora, CO 80042-0429

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 2000 (26 years in practice)
Group practice Memorial Hospital Of Laramie County — 49 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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