DR. MELISSA MARIE SIMONSON M.D.
NPI 1154559763
Internal Medicine in Duluth, MN
About Dr. Melissa Marie Simonson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MELISSA MARIE SIMONSON M.D. (NPI 1154559763) is an individual internal medicine provider in Duluth, Minnesota, licensed in Minnesota (53193) and active in the NPI registry since June 2009. She 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 (2009).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 4
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
Dr. Melissa Marie Simonson M.d. 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
5Medicare enrollment records show Melissa Simonson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Duluth, MN 55805
- Reassigned Medicare billing, Minnesota enrollment
- 1,460 clinicians in this Medicare group
Superior, WI 54880
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: St Marys Hospital Of Superior
- 381 clinicians in this Medicare group
Aurora, MN 55705
- Reassigned Medicare billing, Minnesota enrollment
- 136 clinicians in this Medicare group
Sandstone, MN 55072
- Reassigned Medicare billing, Minnesota enrollment
- 159 clinicians in this Medicare group
Grand Rapids, MN 55744
- Reassigned Medicare billing, Minnesota enrollment
- 171 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 5
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.
Essentia Health St Mary's Medical Center
Acute Care Hospitals · Duluth, MNEssentia Health Duluth
Acute Care Hospitals · Duluth, 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 Melissa Simonson's NPI number?
The NPI number for Melissa Simonson is 1154559763. It was assigned to this individual provider in the NPPES registry on June 23, 2009. The provider is also known as Melissa Marie Larson.
Where is Melissa Simonson located?
Melissa Simonson practices at 400 E 3rd St Essentia Health Duluth Clinic, Duluth, MN 55805. The listed phone number is (218) 786-8364.
What is Melissa Simonson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Melissa Simonson enrolled in Medicare?
Yes. Melissa Simonson 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 Melissa Simonson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Simonson reassigns Medicare benefits to 5 organizations: The Duluth Clinic, Ltd (Duluth, MN), St. Mary's Hospital Of Superior (Superior, WI), Northern Pines Medical Center (Aurora, MN), Pine Medical Center (Sandstone, MN) and Deer River Healthcare Center, Inc. (Grand Rapids, MN). 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 Melissa Simonson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Melissa Simonson accept?
Health plans from Sanford Health Plan list Melissa Simonson 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 Melissa Simonson affiliated with any hospitals?
According to CMS data, Melissa Simonson is affiliated with Essentia Health St Mary's Medical Center and Essentia Health Duluth.
When was this NPI record last updated?
The NPPES record for Melissa Simonson was last updated on October 18, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Dr. Melissa Marie Simonson, M.D. · NPI 1154559763
Internal Medicine physician in Duluth, Minnesota. Individual provider, active in the CMS NPPES registry since June 23, 2009.
## Identity
- **NPI:** 1154559763 (Entity type: Individual)
- **Enumerated:** June 23, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 53193 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 E 3RD ST, ESSENTIA HEALTH DULUTH CLINIC, Duluth, MN 55805-1951
- **Phone:** (218) 786-8364
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): The Duluth Clinic, Ltd (NPI 1245278209, Duluth, MN); St. Mary's Hospital Of Superior (NPI 1083657886, Superior, WI); Northern Pines Medical Center (NPI 1881954147, Aurora, MN); Pine Medical Center (NPI 1326041633, Sandstone, MN); Deer River Healthcare Center, Inc. (NPI 1093152423, Grand Rapids, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 2009
## Record status
- **NPPES last updated:** October 18, 2013
- **Other identifiers:** Medicaid 1154559763 (MN); Medicare PIN 110016235 (MN); Medicaid 1154559763 (MI); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1154559763) · Data from the CMS NPPES public registry.