MS. MAREN J DUNN DO
NPI 1376538512
Family Medicine in Big Sky, MT
About Ms. Maren J Dunn Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MAREN J DUNN DO (NPI 1376538512) is an individual family medicine provider in Big Sky, Montana, licensed in Montana (11561) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS, is affiliated with Billings Clinic, and is a graduate of Kansas City University Of Physicians And Surgeons (2005).
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
Ms. Maren J Dunn Do 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
4Medicare enrollment records show Maren Dunn reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Big Sky, MT 59716
- Reassigned Medicare billing, Montana enrollment
- Also billed through NPI 1588141048 (Montana)
- 99 clinicians in this Medicare group
Bozeman, MT 59715
- Reassigned Medicare billing, Montana enrollment
- 26 clinicians in this Medicare group
Bozeman, MT 59718
- Reassigned Medicare billing, Montana enrollment
- Medicare enrollment name: Billings Clinic
- 1,264 clinicians in this Medicare group
Livingston, MT 59047
- Reassigned Medicare billing, Montana enrollment
- Medicare enrollment name: Community Health Partners Inc
- 26 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 9
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, MTBozeman Health Deaconess Hospital
Acute Care Hospitals · Bozeman, MTBig Sky Medical Center
Critical Access Hospitals · Big Sky, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59716 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.
Referred Medical Equipment & Supplies CMS DME claims 3
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.
BIG SKY, MT 59716
BIG SKY, MT 59716
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 Maren Dunn's NPI number?
The NPI number for Maren Dunn is 1376538512. It was assigned to this individual provider in the NPPES registry on September 14, 2005.
Where is Maren Dunn located?
Maren Dunn practices at 334 Town Center Ave, Big Sky, MT 59716. The listed phone number is (406) 995-6995.
What is Maren Dunn's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Maren Dunn enrolled in Medicare?
Yes. Maren Dunn 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 Maren Dunn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maren Dunn reassigns Medicare benefits to 4 organizations: Bozeman Health Big Sky Medical Center, LLC (Big Sky, MT), Bozeman Health Urgent Care (Bozeman, MT), Billings Cinic (Bozeman, MT) and Bighorn Valley Health Center Incorporated (Livingston, MT). 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 Maren Dunn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Maren Dunn accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans, Providence Health Plan and UnitedHealthcare list Maren Dunn 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 Maren Dunn affiliated with any hospitals?
According to CMS data, Maren Dunn is affiliated with Billings Clinic, Bozeman Health Deaconess Hospital and Big Sky Medical Center.
When was this NPI record last updated?
The NPPES record for Maren Dunn was last updated on July 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Ms. Maren J Dunn, DO · NPI 1376538512
Family Medicine physician in Big Sky, Montana. Individual provider, active in the CMS NPPES registry since September 14, 2005.
## Identity
- **NPI:** 1376538512 (Entity type: Individual)
- **Enumerated:** September 14, 2005
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 11561 (Montana)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 334 TOWN CENTER AVE, Big Sky, MT 59716-1713
- **Phone:** (406) 995-6995
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Bozeman Health Big Sky Medical Center, LLC (NPI 1740659952, Big Sky, MT); Bozeman Health Urgent Care (NPI 1740693761, Bozeman, MT); Billings Cinic (NPI 1215660840, Bozeman, MT); Bighorn Valley Health Center Incorporated (NPI 1487741005, Livingston, MT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kansas City University Of Physicians And Surgeons, class of 2005
## Record status
- **NPPES last updated:** July 9, 2025
- **Other identifiers:** Medicaid 807252900 (ID); Medicaid 1376538512 (MT)
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Source: [NPI Profile](https://npiprofile.com/npi/1376538512) · Data from the CMS NPPES public registry.