STEVEN ALLEN LARSEN MD
NPI 1508953555
Radiology - Diagnostic Radiology in Pocatello, ID
About Steven Allen Larsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN ALLEN LARSEN MD (NPI 1508953555) is an individual diagnostic radiology provider in Pocatello, Idaho, licensed in Idaho (M-9927) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Eastern Idaho Regional Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Steven Allen Larsen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
33Medicare enrollment records show Steven Larsen reassigns Medicare billing to 33 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pocatello, ID 83201
- Reassigned Medicare billing, Idaho, Montana and Wyoming enrollments
- Medicare enrollment name: Medical Imaging Associates Of Idaho Falls Inc
- Also billed through NPI 1740225531 (Wyoming)
- 43 clinicians in this Medicare group
Pocatello, ID 83201
- Reassigned Medicare billing, Idaho, Montana, Utah and Wyoming enrollments
- 36 clinicians in this Medicare group
Idaho Falls, ID 83404
- Reassigned Medicare billing, Idaho, Montana, Utah and Wyoming enrollments
- 37 clinicians in this Medicare group
Rexburg, ID 83440
- Reassigned Medicare billing, Idaho, Montana, Utah and Wyoming enrollments
- 37 clinicians in this Medicare group
Providence, UT 84332
- Reassigned Medicare billing, Idaho, Montana, Utah and Wyoming enrollments
- 34 clinicians in this Medicare group
Washington Terrace, UT 84405
- Reassigned Medicare billing, Utah enrollment
- Also billed through NPI 1215001037 (Utah)
- 46 clinicians in this Medicare group
Sheridan, MT 59749
- Reassigned Medicare billing, Montana enrollment
- 50 clinicians in this Medicare group
Caldwell, ID 83605
- Reassigned Medicare billing, Idaho, Montana, Utah and Wyoming enrollments
- 37 clinicians in this Medicare group
Rawlins, WY 82301
- Reassigned Medicare billing, Wyoming enrollment
- 137 clinicians in this Medicare group
Great Falls, MT 59405
- Reassigned Medicare billing, Idaho enrollment
- 3 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 103
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Eastern Idaho Regional Medical Center
Acute Care Hospitals · Idaho Falls, IDPortneuf Medical Center
Acute Care Hospitals · Pocatello, IDBay Area Hospital
Acute Care Hospitals · Coos Bay, ORMemorial Hospital
Acute Care Hospitals · Gonzales, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 83201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
POCATELLO, ID 83201
POCATELLO, ID 83201
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 Steven Larsen's NPI number?
The NPI number for Steven Larsen is 1508953555. It was assigned to this individual provider in the NPPES registry on October 9, 2006.
Where is Steven Larsen located?
Steven Larsen practices at 777 Hospital Way Bldg B, Pocatello, ID 83201. The listed phone number is (208) 239-1000.
What is Steven Larsen's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Steven Larsen enrolled in Medicare?
Yes. Steven Larsen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Steven Larsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Larsen reassigns Medicare benefits to 33 organizations: Medical Imaging Assoc Of Idaho Falls, PA (Pocatello, ID), Teton Vascular Institute Of Pocatello A Series Of Teton Group (Pocatello, ID), Teton Radiology Diagnostic A Series Of Teton Group Enterprise (Idaho Falls, ID), Teton Radiology Madison LLC (Rexburg, ID), Cache Valley Vein (Providence, UT) and 28 more organizations, listed in the Medicare section above. Each 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 Steven Larsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Larsen accept?
Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 9 other insurers list Steven Larsen 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.
Is Steven Larsen affiliated with any hospitals?
According to CMS data, Steven Larsen is affiliated with Eastern Idaho Regional Medical Center, Portneuf Medical Center, Bay Area Hospital and Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Steven Larsen was last updated on June 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.
# Steven Allen Larsen, MD · NPI 1508953555
Diagnostic Radiology physician in Pocatello, Idaho. Individual provider, active in the CMS NPPES registry since October 9, 2006.
## Identity
- **NPI:** 1508953555 (Entity type: Individual)
- **Enumerated:** October 9, 2006
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** M-9927 (Idaho)
- **Sole proprietor:** No
## Practice location
- **Address:** 777 HOSPITAL WAY, BLDG B, Pocatello, ID 83201-5175
- **Phone:** (208) 239-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 33 organizations under Medicare reassignment (form CMS-855R): Medical Imaging Assoc Of Idaho Falls, PA (NPI 1043400484, Pocatello, ID); Teton Vascular Institute Of Pocatello A Series Of Teton Group (NPI 1508224379, Pocatello, ID); Teton Radiology Diagnostic A Series Of Teton Group Enterprise (NPI 1013085604, Idaho Falls, ID); Teton Radiology Madison LLC (NPI 1407081060, Rexburg, ID); Cache Valley Vein (NPI 1831662311, Providence, UT); and 28 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Utah School Of Medicine, class of 2001
## Record status
- **NPPES last updated:** June 5, 2026
- **Other identifiers:** Medicaid 005925 (OR); Medicaid 807481100 (ID); Medicaid 9000153682 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1508953555) · Data from the CMS NPPES public registry.