STEVEN J. GERSTNER MD
NPI 1124130695
Internal Medicine in Billings, MT
About Steven J. Gerstner Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN J. GERSTNER MD (NPI 1124130695) is an individual internal medicine provider in Billings, Montana, licensed in Montana (6476) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Billings Clinic, and is a graduate of University Of California, Geffen School Of Medicine (1986).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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 J. Gerstner 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 Reassignment
Medicare enrollment records show Steven Gerstner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Billings, MT 59101
- Reassigned Medicare billing, Montana enrollment
- 1,264 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 5
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Billings Clinic
Acute Care Hospitals · Billings, MTSt Vincent Healthcare
Acute Care Hospitals · Billings, MTSheridan Memorial Hospital
Acute Care Hospitals · Sheridan, WYPhysician 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.
Referred Medical Equipment & Supplies CMS DME claims 8
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
BILLINGS, MT 59101
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 Gerstner's NPI number?
The NPI number for Steven Gerstner is 1124130695. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is Steven Gerstner located?
Steven Gerstner practices at 801 N 29th St, Billings, MT 59101. The listed phone number is (406) 238-2500.
What is Steven Gerstner's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Steven Gerstner enrolled in Medicare?
Yes. Steven Gerstner 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 organization bills Medicare for Steven Gerstner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Gerstner reassigns Medicare benefits to Billings Clinic (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 Steven Gerstner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Gerstner accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list Steven Gerstner 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 Gerstner affiliated with any hospitals?
According to CMS data, Steven Gerstner is affiliated with Billings Clinic, St Vincent Healthcare and Sheridan Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Steven Gerstner was last updated on February 22, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Steven J. Gerstner, MD · NPI 1124130695
Internal Medicine physician in Billings, Montana. Individual provider, active in the CMS NPPES registry since August 31, 2006.
## Identity
- **NPI:** 1124130695 (Entity type: Individual)
- **Enumerated:** August 31, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 6476 (Montana)
- **Sole proprietor:** No
## Practice location
- **Address:** 801 N 29TH ST, Billings, MT 59101-0905
- **Phone:** (406) 238-2500
## 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:** Billings Clinic (NPI 1376598714, Billings, MT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Geffen School Of Medicine, class of 1986
## Record status
- **NPPES last updated:** February 22, 2022
- **Other identifiers:** Other 0109772 (MT); Other 000098250 (MT)
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Source: [NPI Profile](https://npiprofile.com/npi/1124130695) · Data from the CMS NPPES public registry.