PETER AAS MD
NPI 1063455848
Hospitalist in Duluth, MN
About Peter Aas Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER AAS MD (NPI 1063455848) is an individual hospitalist provider in Duluth, Minnesota, licensed in Minnesota (45641) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Essentia Health St Mary's Medical Center, and is a graduate of University Of Minnesota Medical School (2002).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Peter Aas Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Peter Aas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Superior, WI 54880
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: St Marys Hospital Of Superior
- 381 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 6
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.
Essentia Health St Mary's Medical Center
Acute Care Hospitals · Duluth, MNEssentia Health Duluth
Acute Care Hospitals · Duluth, MNEssentia Health Virginia
Acute Care Hospitals · Virginia, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55805 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.
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 Peter Aas's NPI number?
The NPI number for Peter Aas is 1063455848. It was assigned to this individual provider in the NPPES registry on June 13, 2006.
Where is Peter Aas located?
Peter Aas practices at 400 E 3rd St, Duluth, MN 55805. The listed phone number is (218) 786-8364.
What is Peter Aas's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Peter Aas enrolled in Medicare?
Yes. Peter Aas is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Peter Aas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Aas reassigns Medicare benefits to St. Mary's Hospital Of Superior (Superior, WI). 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 Peter Aas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Peter Aas affiliated with any hospitals?
According to CMS data, Peter Aas is affiliated with Essentia Health St Mary's Medical Center, Essentia Health Duluth and Essentia Health Virginia.
When was this NPI record last updated?
The NPPES record for Peter Aas was last updated on November 1, 2017. 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.
# Peter Aas, MD · NPI 1063455848
Hospitalist physician in Duluth, Minnesota. Individual provider, active in the CMS NPPES registry since June 13, 2006.
## Identity
- **NPI:** 1063455848 (Entity type: Individual)
- **Enumerated:** June 13, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 45641 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 E 3RD ST, Duluth, MN 55805-1951
- **Phone:** (218) 786-8364
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** St. Mary's Hospital Of Superior (NPI 1083657886, Superior, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 2002
## Record status
- **NPPES last updated:** November 1, 2017
- **Other identifiers:** Medicare UPIN I39047; Medicaid 779472000 (MN); Medicare PIN 110010303 (MN)
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Source: [NPI Profile](https://npiprofile.com/npi/1063455848) · Data from the CMS NPPES public registry.