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DR. ROBERT REX DIETZ MD
NPI 1174559124
Radiology - Diagnostic Radiology in Billings, MT

Active since June 23, 2006PECOS Enrolled
2900 12TH AVE N, SUITE 210W, BILLINGS, MT 59101(406) 237-5862(406) 238-6068 Get Directions Write a Review

NPPES record last updated: July 16, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Robert Rex Dietz Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROBERT REX DIETZ MD (NPI 1174559124) is an individual diagnostic radiology provider in Billings, Montana, licensed in Montana (7277) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174559124
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDR. ROBERT REX DIETZCredential: MD
Location Address2900 12TH AVE N, SUITE 210WBillings, MT 59101-7506
Mailing Address4793 Us Highway 3Billings, MT 59106-9676 · (406) 237-5862 · Fax (406) 238-6068
Phone(406) 237-5862
Fax(406) 238-6068
Sole ProprietorNo
Enumeration DateJune 23, 2006
Last NPPES UpdateJuly 16, 2013
✔ NPI 1174559124 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
License✔ Licensed in MT · 7277
Definition
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Also ListedRadiology · NeuroradiologyTaxonomy 2085N0700X · License 7277 (MT)
2900 12TH AVE N, Billings, MT 59101
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Other Names 1

Other Name (5)Dr. R Rex Dietz Md

Other Identifiers 5

Medicare ID-Type Unspecified10000603MT
Medicaid99125MT
Medicaid101253300WY
Other6031MT · Blue Cross Blue Shield
Medicare UPINF09412MT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Wyoming.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Robert Rex Dietz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Robert Dietz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Eastern Radiological Associates PC
Same address
Diagnostic Ultrasound
2900 12TH AVE N, 2E
Billings, MT 59101
  • Reassigned Medicare billing, Montana enrollment
  • 26 clinicians in this Medicare group
NPI 1639102171 (406) 237-5862

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$87.97 typical visit price
range $56.81 – $172.26
Typical copayment $21.99 (range $14.20 – $43.06)
Most-billed visit code 99203
Established Patient
$70.82 typical visit price
range $18.24 – $140.32
Typical copayment $17.70 (range $4.56 – $35.08)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DANIEL M MOLLOY M.D.
Obstetrics & Gynecology
2900 12TH AVE N, STE 245W
BILLINGS, MT 59101
Yellowstone County (406) 238-6010
ST VINCENT HEALTHCARE
Clinic/Center
2900 12TH AVE N, SUITE 130W
BILLINGS, MT 59101
Yellowstone County (406) 237-3620
ST. VINCENT HEALTHCARE
Clinic/Center (Multi-Specialty)
2900 12TH AVE N, SUITE 340W
BILLINGS, MT 59101
Yellowstone County (406) 237-4050
CHARLES MCCLAVE MD
Internal Medicine
2900 12TH AVE N, SUITE 160W
BILLINGS, MT 59101
Yellowstone County (406) 237-8500
DAVID W SHENTON JR. M.D.
Orthopaedic Surgery (Sports Medicine)
2900 12TH AVE N, #100E
BILLINGS, MT 59101
Yellowstone County (406) 238-6700
DR. ROBERT E STOCKDALE M.D.
Urology
2900 12TH AVE N, STE 503E
BILLINGS, MT 59101
Yellowstone County (406) 237-5400
TAD A. STICHMAN PA-C
Physician Assistant
2900 12TH AVE N, SUITE 140W
BILLINGS, MT 59101
Yellowstone County (406) 237-5050
FRED V SCHNEIDER M.D.
Surgery
2900 12TH AVE N, STE 502E
BILLINGS, MT 59101
Yellowstone County (406) 245-6982

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Robert Dietz's NPI number?

The NPI number for Robert Dietz is 1174559124. It was assigned to this individual provider in the NPPES registry on June 23, 2006. The provider is also known as Dr. R Rex Dietz MD.

Where is Robert Dietz located?

Robert Dietz practices at 2900 12th Ave N Suite 210W, Billings, MT 59101. The listed phone number is (406) 237-5862.

What is Robert Dietz's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Robert Dietz enrolled in Medicare?

Yes. Robert Dietz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Robert Dietz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Robert Dietz reassigns Medicare benefits to Eastern Radiological Associates PC (Billings, MT). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Dietz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Robert Dietz accept?

Health plans from Blue Cross Blue Shield of Wyoming list Robert Dietz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Robert Dietz was last updated on July 16, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.