MARY J OYEN MD
NPI 1770536161
Ophthalmology in Platteville, WI
About Mary J Oyen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY J OYEN MD (NPI 1770536161) is an individual ophthalmology provider in Platteville, Wisconsin, licensed in Wisconsin (35622-020) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Southwest Health Center, and is a graduate of University Of Wisconsin School Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
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 J Oyen 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 Reassignment
Medicare enrollment records show Mary Oyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Platteville, WI 53818
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1831279793 (Wisconsin)
- 175 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Southwest Health Center
Critical Access Hospitals · Platteville, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53818 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.
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.
PLATTEVILLE, WI 53818
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 Oyen's NPI number?
The NPI number for Mary Oyen is 1770536161. It was assigned to this individual provider in the NPPES registry on May 18, 2006.
Where is Mary Oyen located?
Mary Oyen practices at 1450 Eastside Rd Ste 120, Platteville, WI 53818. The listed phone number is (608) 342-2020.
What is Mary Oyen's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Mary Oyen enrolled in Medicare?
Yes. Mary Oyen 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 organization bills Medicare for Mary Oyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Oyen reassigns Medicare benefits to Southwest Health Center, Inc. (Platteville, 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 Mary Oyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Oyen accept?
Health plans from Anthem Blue Cross and Blue Shield, Blue Cross Blue Shield of Wyoming, Blue Cross and Blue Shield of Louisiana, Blue Cross and Blue Shield of Montana and Blue Cross and Blue Shield of Oklahoma and 5 other insurers list Mary Oyen 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 Oyen affiliated with any hospitals?
According to CMS data, Mary Oyen is affiliated with Southwest Health Center.
When was this NPI record last updated?
The NPPES record for Mary Oyen was last updated on November 27, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Mary J Oyen, MD · NPI 1770536161
Ophthalmology physician in Platteville, Wisconsin. Individual provider, active in the CMS NPPES registry since May 18, 2006.
## Identity
- **NPI:** 1770536161 (Entity type: Individual)
- **Enumerated:** May 18, 2006
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 35622-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1450 EASTSIDE RD, STE 120, Platteville, WI 53818-9800
- **Phone:** (608) 342-2020 · **Fax:** (608) 342-6330
## 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:** Southwest Health Center, Inc. (NPI 1548345150, Platteville, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** November 27, 2020
- **Other identifiers:** Other 6439 (WI); Other 1024301 (WI); Medicaid 32460100 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1770536161) · Data from the CMS NPPES public registry.