JUSTINN E. LAHAYE MD
NPI 1376003400
Internal Medicine - Critical Care Medicine in Great Falls, MT
About Justinn E. Lahaye Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JUSTINN E. LAHAYE MD (NPI 1376003400) is an individual critical care medicine provider in Great Falls, Montana, licensed in Montana (137199) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, is affiliated with St Peters Health, and maintains a secondary practice location in Salt Lake City.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
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
Justinn E. Lahaye 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 Justinn Lahaye reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Great Falls, MT 59405
- Reassigned Medicare billing, Montana enrollment
- 637 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.
St Peters Health
Acute Care Hospitals · Helena, MTBenefis Hospitals Inc
Acute Care Hospitals · Great Falls, MTNorthern Montana Hospital
Critical Access Hospitals · Havre, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
GREAT FALLS, MT 59405
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 Justinn Lahaye's NPI number?
The NPI number for Justinn Lahaye is 1376003400. It was assigned to this individual provider in the NPPES registry on March 24, 2019. The provider is also known as Justinn Marshall.
Where is Justinn Lahaye located?
Justinn Lahaye practices at 1101 26th St S, Great Falls, MT 59405. The listed phone number is (406) 731-8888.
What is Justinn Lahaye's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Justinn Lahaye enrolled in Medicare?
Yes. Justinn Lahaye 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 Justinn Lahaye's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Justinn Lahaye reassigns Medicare benefits to Benefis Hospitals, Inc. (Great Falls, 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 Justinn Lahaye's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Justinn Lahaye accept?
Health plans from Blue Cross and Blue Shield of Montana list Justinn Lahaye 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 Justinn Lahaye affiliated with any hospitals?
According to CMS data, Justinn Lahaye is affiliated with St Peters Health, Benefis Hospitals Inc and Northern Montana Hospital.
When was this NPI record last updated?
The NPPES record for Justinn Lahaye was last updated on September 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Justinn E. Lahaye, MD · NPI 1376003400
Critical Care Medicine physician in Great Falls, Montana. Individual provider, active in the CMS NPPES registry since March 24, 2019.
## Identity
- **NPI:** 1376003400 (Entity type: Individual)
- **Enumerated:** March 24, 2019
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 137199 (Montana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1101 26TH ST S, Great Falls, MT 59405-5161
- **Phone:** (406) 731-8888 · **Fax:** (406) 731-8318
## 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:** Benefis Hospitals, Inc. (NPI 1881650737, Great Falls, MT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Washington School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** September 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1376003400) · Data from the CMS NPPES public registry.