ERIK SIEVERTSEN MD
NPI 1134137136
Emergency Medicine in Muskegon, MI
About Erik Sievertsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ERIK SIEVERTSEN MD (NPI 1134137136) is an individual emergency medicine provider in Muskegon, Michigan, licensed in Wisconsin (86111) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and maintains a secondary practice location in Stevens Point.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
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
Erik Sievertsen 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
6Medicare enrollment records show Erik Sievertsen reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Juneau, WI 53039
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 clinicians in this Medicare group
Plover, WI 54467
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Neillsville, WI 54456
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1346239373 (Wisconsin)
- 1,283 clinicians in this Medicare group
Park Falls, WI 54552
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1700963048 (Wisconsin)
- 1,351 clinicians in this Medicare group
Chetek, WI 54728
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 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 3
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.
Marshfield Medical Center
Acute Care Hospitals · Marshfield, WIFlambeau Hospital
Critical Access Hospitals · Park Falls, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49443 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 Erik Sievertsen's NPI number?
The NPI number for Erik Sievertsen is 1134137136. It was assigned to this individual provider in the NPPES registry on August 4, 2006.
Where is Erik Sievertsen located?
Erik Sievertsen practices at 1700 Clinton St, Muskegon, MI 49443. The listed phone number is (231) 728-4601.
What is Erik Sievertsen's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Erik Sievertsen enrolled in Medicare?
Yes. Erik Sievertsen 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 Erik Sievertsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Erik Sievertsen reassigns Medicare benefits to 6 organizations: Beaver Dam Community Hospitals Inc (Juneau, WI), Mchs Hospitals, Inc. (Plover, WI), Marshfield Clinic Inc (Marshfield, WI), Memorial Hospital, Inc (Neillsville, WI), Flambeau Hospital Inc (Park Falls, WI) and 1 more organization, 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 Erik Sievertsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Erik Sievertsen affiliated with any hospitals?
According to CMS data, Erik Sievertsen is affiliated with Marshfield Medical Center and Flambeau Hospital.
When was this NPI record last updated?
The NPPES record for Erik Sievertsen was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Erik Sievertsen, MD · NPI 1134137136
Emergency Medicine physician in Muskegon, Michigan. Individual provider, active in the CMS NPPES registry since August 4, 2006.
## Identity
- **NPI:** 1134137136 (Entity type: Individual)
- **Enumerated:** August 4, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 86111 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1700 CLINTON ST, Muskegon, MI 49443
- **Phone:** (231) 728-4601
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Beaver Dam Community Hospitals Inc (NPI 1831410521, Juneau, WI); Mchs Hospitals, Inc. (NPI 1386249894, Plover, WI); Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI); Memorial Hospital, Inc (NPI 1679746747, Neillsville, WI); Flambeau Hospital Inc (NPI 1194317966, Park Falls, WI); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1991
## Record status
- **NPPES last updated:** February 5, 2026
- **Other identifiers:** Other 930103748 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1134137136) · Data from the CMS NPPES public registry.