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

Dr. Nathaniel Rieb, MD

Individual provider Surgery Physician · NPI 1508068834

Dr. Nathaniel Rieb, MD practises General Surgery in Billings, Montana. Graduated from University of Washington School of Medicine in 2005, 21 years ago. Practices with Billings Clinic, a 805-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Wyoming.

Years since qualifying
21
Trained at
University of Washington School of Medicine
Licensed in
WY
In the registry since
2007
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)

  • 450 Mountain View St, Powell, WY 82435-2212 — (307) 754-7257

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 1345 (WY)

Record details

NPI number1508068834
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 31, 2007
Last updated in NPPESDecember 20, 2022
Certification dateDecember 20, 2022

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Billings Clinic — 805 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 152 times · 89th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 67 times · 69th percentile
Hernia repair - groin (open) 1–10 times
Removal of tissue 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients155
Services billed 198 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Colleagues at Billings Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 805 clinicians in the practice; 12 are shown here.

Other providers in Billings