MRS. JUSTINE M. DEROUSSE PA-C
NPI 1609843168
Physician Assistant - Medical in Bozeman, MT

Q: What is Justine Derousse's NPI number?

The NPI number for Justine Derousse is 1609843168. It was assigned to this individual provider in the NPPES registry on March 3, 2006. The provider is also known as Ms. Justine M. Piorkowski.

Q: What is Justine Derousse's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Q: When was this NPI record last updated?

The NPPES record for Justine Derousse was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 42 days 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.

Active since March 03, 2006PECOS EnrolledAccepts Medicare Assignment

1006 W MAIN ST, BOZEMAN, MT 59715(406) 414-4800 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Mrs. Justine M. Derousse Pa-c NPPES

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

MRS. JUSTINE M. DEROUSSE PA-C (NPI 1609843168) is an individual medical provider in Bozeman, Montana, licensed in Montana (MED-PAC-LIC-451) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Bozeman Health Deaconess Hospital, and maintains a secondary practice location in Kalispell.

NPPES Registry Identity

NPI1609843168

Entity TypeIndividualFemale

Primary Taxonomy363AM0700X

Provider Legal NameMRS. JUSTINE M. DEROUSSECredential: PA-C

Location Address1006 W MAIN STBozeman, MT 59715-3219

Mailing Address915 Highland BlvdBozeman, MT 59715-6902 · (406) 414-5000

Phone(406) 414-4800

Sole ProprietorNo

Medical School CMSOtherGraduated 2001

Enumeration DateMarch 3, 2006

Last NPPES UpdateJune 24, 2026

NPPES CertifiedJune 24, 2026

✔ NPI 1609843168 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AM0700X

License✔ Licensed in MT · MED-PAC-LIC-451

Also ListedPhysician AssistantTaxonomy 363A00000X · License 451 (MT)

1006 W MAIN ST, Bozeman, MT 59715

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Other Names 1

Former Name (1)Ms. Justine M. Piorkowski

Secondary Practice Location 1

Location 1350 Heritage Way, Suite 1100Kalispell, MT 59901-3158 · Phone (406) 752-8900 ext. 232 · Fax (406) 752-8905

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Justine M. Derousse Pa-c 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.

PECOS PAC ID1456333111

PECOS Enrollment IDI20070403000660

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.

Areas of Expertise CMS Part B claims 13

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

116 services109 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

71 services71 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

38 services37 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

31 services31 patients

Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635

This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.

28 services28 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

26 services26 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

20 services20 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

18 services18 patients

Removal of impacted ear wax by washing 69209

Impacted ear wax removal by washing, also known as ear irrigation, involves using a pressurized flow of water to break up and dislodge the ear wax. This safe procedure helps restore normal hearing and relieve discomfort caused by the blockage.

15 services15 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

15 services15 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

14 services14 patients

Detection test by multiplex amplified probe technique for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (covid-19) and influenza virus types a and b 87636

This test detects the presence of SARS-CoV-2 (COVID-19) and Influenza types A and B in your body. It uses a method called the multiplex amplified probe technique to amplify and identify specific virus genes. It helps in early diagnosis and appropriate treatment.

13 services13 patients

Urinalysis, manual test 81002

A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Bozeman Health Deaconess Hospital

Acute Care Hospitals · Bozeman, MT

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number270057

Location915 Highland Blvd Suite 3310Bozeman, MT 59715 · Gallatin County

Emergency services Birthing friendly

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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.

DR. JOHN MICHAEL WISE MD

Specialist