HEATHER ANN MUSTER MD
NPI 1992825814
Internal Medicine - Nephrology in Duluth, MN
About Heather Ann Muster Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HEATHER ANN MUSTER MD (NPI 1992825814) is an individual nephrology provider in Duluth, Minnesota, licensed in Minnesota (44582) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS, is affiliated with M Health Fairview Southdale Hospital, and is a graduate of University Of Minnesota Medical School (1999).
NPPES Registry Identity
Specialties & Licenses
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
Heather Ann Muster 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 Reassignments
11Medicare enrollment records show Heather Muster reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pine City, MN 55063
- Reassigned Medicare billing, Minnesota enrollment
- 2,302 clinicians in this Medicare group
Crosby, MN 56441
- Reassigned Medicare billing, Minnesota enrollment
- 224 clinicians in this Medicare group
Wyoming, MN 55092
- Reassigned Medicare billing, Minnesota enrollment
- 3,633 clinicians in this Medicare group
Wyoming, MN 55092
- Reassigned Medicare billing, Minnesota enrollment
- 4,038 clinicians in this Medicare group
Stillwater, MN 55082
- Reassigned Medicare billing, Minnesota enrollment
- 2,361 clinicians in this Medicare group
Maplewood, MN 55109
- Reassigned Medicare billing, Minnesota enrollment
- 1,178 clinicians in this Medicare group
Saint Paul, MN 55102
- Reassigned Medicare billing, Minnesota enrollment
- 671 clinicians in this Medicare group
Woodbury, MN 55125
- Reassigned Medicare billing, Minnesota enrollment
- 955 clinicians in this Medicare group
Minneapolis, MN 55411
- Reassigned Medicare billing, Minnesota enrollment
- 1,453 clinicians in this Medicare group
Minneapolis, MN 55455
- Reassigned Medicare billing, Minnesota enrollment
- 1,662 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 2
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
M Health Fairview Southdale Hospital
Acute Care Hospitals · Edina, MNM Health Fairview University Of Mn
Acute Care Hospitals · Minneapolis, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55802 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Heather Muster's NPI number?
The NPI number for Heather Muster is 1992825814. It was assigned to this individual provider in the NPPES registry on April 2, 2007.
Where is Heather Muster located?
Heather Muster practices at 1001 E Superior St Ste L201, Duluth, MN 55802. The listed phone number is (218) 249-7980.
What is Heather Muster's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Heather Muster enrolled in Medicare?
Yes. Heather Muster 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 Heather Muster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Heather Muster reassigns Medicare benefits to 11 organizations: Fairview Clinics (Pine City, MN), Cuyuna Regional Medical Center (Crosby, MN), Fairview Express Care (Wyoming, MN), Fairview Health Services (Wyoming, MN), Healtheast Medical Research Institute (Stillwater, MN) and 6 more organizations, listed in the Medicare section above. 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 Heather Muster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Heather Muster accept?
Health plans from Sanford Health Plan list Heather Muster 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 Heather Muster affiliated with any hospitals?
According to CMS data, Heather Muster is affiliated with M Health Fairview Southdale Hospital and M Health Fairview University Of Mn.
When was this NPI record last updated?
The NPPES record for Heather Muster was last updated on April 10, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Heather Ann Muster, MD · NPI 1992825814
Nephrology physician in Duluth, Minnesota. Individual provider, active in the CMS NPPES registry since April 2, 2007.
## Identity
- **NPI:** 1992825814 (Entity type: Individual)
- **Enumerated:** April 2, 2007
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 44582 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 1001 E SUPERIOR ST STE L201, Duluth, MN 55802-2207
- **Phone:** (218) 249-7980 · **Fax:** (218) 249-7911
## 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:** 11 organizations under Medicare reassignment (form CMS-855R): Fairview Clinics (NPI 1477781375, Pine City, MN); Cuyuna Regional Medical Center (NPI 1538143896, Crosby, MN); Fairview Express Care (NPI 1346587805, Wyoming, MN); Fairview Health Services (NPI 1083692941, Wyoming, MN); Healtheast Medical Research Institute (NPI 1285929265, Stillwater, MN); and 6 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1999
## Record status
- **NPPES last updated:** April 10, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1992825814) · Data from the CMS NPPES public registry.