DR. STAN L MARKUS MD
NPI 1134103641
Surgery in Oconomowoc, WI
About Dr. Stan L Markus Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STAN L MARKUS MD (NPI 1134103641) is an individual surgery provider in Oconomowoc, Wisconsin, licensed in Wisconsin (28258) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Wright State University Boonshoft School Of Medicine (1982).
NPPES Registry Identity
Specialties & Licenses 2
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. Stan L Markus 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
4Medicare enrollment records show Stan Markus reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oconomowoc, WI 53066
- Reassigned Medicare billing, Wisconsin enrollment
- 528 clinicians in this Medicare group
Juneau, WI 53039
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 clinicians in this Medicare group
Janesville, WI 53548
- Reassigned Medicare billing, Wisconsin enrollment
- 1,155 clinicians in this Medicare group
Wisconsin Dells, WI 53965
- Reassigned Medicare billing, Wisconsin enrollment
- 189 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 12
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.
Waukesha Memorial Hospital
Acute Care Hospitals · Waukesha, WIOconomowoc Memorial Hospital
Acute Care Hospitals · Oconomowoc, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53066 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 6
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 Stan Markus's NPI number?
The NPI number for Stan Markus is 1134103641. It was assigned to this individual provider in the NPPES registry on November 30, 2005.
Where is Stan Markus located?
Stan Markus practices at 888 Thackeray Trl Ste 103, Oconomowoc, WI 53066. The listed phone number is (262) 567-1499.
What is Stan Markus's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Stan Markus enrolled in Medicare?
Yes. Stan Markus 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 Stan Markus's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stan Markus reassigns Medicare benefits to 4 organizations: Prohealth Medical Group Inc (Oconomowoc, WI), Beaver Dam Community Hospitals Inc (Juneau, WI), Mercy Health System Corporation (Janesville, WI) and Mile Bluff Medical Center Inc (Wisconsin Dells, 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 Stan Markus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Stan Markus accept?
Health plans from Anthem Blue Cross and Blue Shield, Dean Health Plan, Network Health and UnitedHealthcare list Stan Markus 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 Stan Markus affiliated with any hospitals?
According to CMS data, Stan Markus is affiliated with Waukesha Memorial Hospital and Oconomowoc Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Stan Markus was last updated on November 29, 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.