Justinn E. Lahaye, MD
Critical Care Medicine (Internal Medicine) Physician · Great Falls, MT
Justinn E. Lahaye, MD is a critical care medicine (internal medicine) physician with a practice address in Great Falls, Montana, and NPI 1376003400, issued on Mar 24, 2019. Check the license (Montana 137199, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Justinn E. Lahaye
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- 137199 MT
11888618-1205 UT
Self-reported in NPPES; status is on the state search - Practice location
- 1101 26TH St S, Great Falls, MT 59405
- Phone
- (406) 731-8888
- Enumerated
- Mar 24, 2019
- Record last updated
- Sep 19, 2024
- Fax
- (406) 731-8318
- Medicare enrollment
- Enrolled (PECOS I20240514003174); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 9 in Montana → Look up another NPI →
Also registered at 1101 26TH St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Justinn E. Lahaye in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 137199Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
19 Medicare Part D claims for 14 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
One hospital affiliation
- Benefis Hospitals IncGreat Falls, MT · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Critical Care Medicine (Internal Medicine) Physician providers in Montana
There are 9 critical care medicine (internal medicine) physician records in Montana.
All 9 in Montana → Every provider in Great Falls → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Navpreet Sidhu, M.D.Great Falls, MT 594051336303304
- Holly Strong, M.D.Great Falls, MT 594051548310998
- Scott Deppe, M.D.Great Falls, MT 594041437131422
- Bruno Ferreira RodriguesBillings, MT 591011134570526
- Marjorie Tevlin, M.D.Billings, MT 591011790734382
- Michael Gruber, MDBozeman, MT 597151578671699
- Janet Lee, M.D.Bozeman, MT 597181124327762
- Brian Davis, M.D.Missoula, MT 598081205913506
Common questions
What is Justinn E. Lahaye, MD's NPI number?
Justinn E. Lahaye, MD's National Provider Identifier (NPI) is 1376003400, issued on Mar 24, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Justinn E. Lahaye, MD located?
The NPPES record lists a practice address at 1101 26TH St S, Great Falls, MT, 59405. Phone: (406) 731-8888. Providers update this record themselves, so call before visiting.
How can I verify Justinn E. Lahaye, MD's license?
NPPES lists Montana license number 137199, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Justinn E. Lahaye, MD prescribe under Medicare Part D?
In 2024, Justinn E. Lahaye, MD had 19 Medicare Part D claims for 14 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.