John M. Schallenkamp, MD
Radiation Oncology Physician · Billings, MT
John M. Schallenkamp, MD is a radiation oncology physician with a practice address in Billings, Montana, and NPI 1265455018, issued on Jul 25, 2006. Check the license (Montana 10809, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John M. Schallenkamp
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 10809 MT
DR.0075716 CO
Self-reported in NPPES; status is on the state search - Practice location
- 801 N 29TH St, Billings, MT 59101
- Phone
- (406) 238-2500
- Enumerated
- Jul 25, 2006
- Record last updated
- Jul 15, 2025
- Medicare enrollment
- Enrolled (PECOS I20060110000705); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 24 in Montana → Look up another NPI →
Also registered at 801 N 29TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Annalee Anderson, MA, CCC-SLPSpeech-Language Pathologist1083047088
- Bijan Andrade, DPMFoot & Ankle Surgery Podiatrist1891059556
Verify John M. Schallenkamp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 10809Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average radiation oncology physician in 2024
60 Medicare Part D claims for 32 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl22 claims
- Bicalutamide17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 94.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $21.42
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Billings ClinicCody, WY
- Memorial Hospital OF Laramie CountyCheyenne, WY
- Memorial Hospital OF Sheridan CountySheridan, WY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John M. Schallenkamp among 24 radiation oncology physician records in Montana
John M. Schallenkamp, MD is one of 24 radiation oncology physician records with a practice address in Montana. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 21% of them.
- NPI issued2006 · 21% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2000 · median 1997 among the 19 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Montana
There are 24 radiation oncology physician records in Montana.
All 24 in Montana → Every provider in Billings → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Christopher Goulet, M.D.Billings, MT 591011437137155
- Breanne Terakedis, M.D.Billings, MT 591011609010578
- Frank Lamm, MDBillings, MT 591021417949033
- Trent Mihalick, M.D.Billings, MT 591021942306063
- Rebecca Tarlton, MDBillings, MT 591021083655393
- Ralf Kiehl, MDSidney, MT 592701760483788
- Robert Pfeffer, M.D.Sidney, MT 592701679563639
- Joseph Clyde, MDGreat Falls, MT 594051710478698
Common questions
What is John M. Schallenkamp, MD's NPI number?
John M. Schallenkamp, MD's National Provider Identifier (NPI) is 1265455018, issued on Jul 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John M. Schallenkamp, MD located?
The NPPES record lists a practice address at 801 N 29TH St, Billings, MT, 59101. Phone: (406) 238-2500. Providers update this record themselves, so call before visiting.
How can I verify John M. Schallenkamp, MD's license?
NPPES lists Montana license number 10809, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John M. Schallenkamp, MD prescribe under Medicare Part D?
In 2024, John M. Schallenkamp, MD had 60 Medicare Part D claims for 32 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is John M. Schallenkamp, MD's MIPS final score?
The 2023 MIPS final score is 94.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.