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

Aaron Tenharmsel, MD

Individual provider Family Medicine Physician · NPI 1255623583

Aaron Tenharmsel, MD is registered under Family Practice in Billings, Montana. Graduated from Rush Medical College of Rush University in 2011, 15 years ago. Practices with Cogent Healthcare of Montana P C, a 82-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
15
Trained at
Rush Medical College of Rush University
Licensed in
MT
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1233 N 30th St
Billings, MT 59101-0127 Not confirmed with CMS for 10 years — call before visiting
Phone: (406) 237-7000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence MED-PHYS-LIC-33530 (MT)

Record details

NPI number1255623583
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 4, 2011
Last updated in NPPESJuly 2, 2016

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2011 (15 years in practice)
Group practice Cogent Healthcare Of Montana P C — 82 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients291
Services billed 568 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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. Those with a page here are linked.

  • Cody Regional Health Hospital · Cody, WY · listed as Cody Regional Health EMS
  • Intermountain Health St Vincent Regional Hospital Hospital · Billings, MT

Colleagues at Cogent Healthcare of Montana P C

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 82 clinicians in the practice; 12 are shown here.

Other providers in Billings