MARY K FRIESS APNP
NPI 1750479820
Nurse Practitioner - Family in Oshkosh, WI
About Mary K Friess Apnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY K FRIESS APNP (NPI 1750479820) is an individual family provider in Oshkosh, Wisconsin, licensed in Wisconsin (2978) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 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
Mary K Friess Apnp 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
2Medicare enrollment records show Mary Friess reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Kaukauna, WI 54130
- Reassigned Medicare billing, Wisconsin enrollment
- 24 clinicians in this Medicare group
Green Bay, WI 54304
- Reassigned Medicare billing, Wisconsin enrollment
- 5 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 19
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Marshfield Medical Center
Acute Care Hospitals · Marshfield, WIDivine Savior Healthcare
Acute Care Hospitals · Portage, WIMarshfield Medical Center - Beaver Dam (mmc-Bd)
Acute Care Hospitals · Beaver Dam, WIColumbus Community Hospital
Critical Access Hospitals · Columbus, WIBerlin Memorial Hospital
Critical Access Hospitals · Berlin, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54901 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 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Mary Friess's NPI number?
The NPI number for Mary Friess is 1750479820. It was assigned to this individual provider in the NPPES registry on October 11, 2006.
Where is Mary Friess located?
Mary Friess practices at 500 Algoma Blvd Uw Oshkosh - College Of Nursing, Oshkosh, WI 54901. The listed phone number is (920) 926-2605.
What is Mary Friess's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Friess enrolled in Medicare?
Yes. Mary Friess 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 Mary Friess's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Friess reassigns Medicare benefits to 2 organizations: Sequoia Integrative Medical Services LLC (Kaukauna, WI) and Synergy Medical Services LLC (Green Bay, WI). 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 Mary Friess's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Friess accept?
Health plans from CareSource (Common Ground Healthcare), Network Health, Security Health Plan and UnitedHealthcare list Mary Friess 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 Mary Friess affiliated with any hospitals?
According to CMS data, Mary Friess is affiliated with Marshfield Medical Center, Divine Savior Healthcare, Marshfield Medical Center - Beaver Dam (mmc-Bd), Columbus Community Hospital and Berlin Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Mary Friess was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.