EMILY KATHLEEN WILCZAK M.D.
NPI 1386969400
Surgery in Lake Geneva, WI
About Emily Kathleen Wilczak M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EMILY KATHLEEN WILCZAK M.D. (NPI 1386969400) is an individual surgery provider in Lake Geneva, Wisconsin, licensed in Illinois (036136945) and active in the NPI registry since March 2010. She is enrolled in Medicare PECOS, is affiliated with Mercy Walworth Hospital & Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 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
Emily Kathleen Wilczak 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
2Medicare enrollment records show Emily Wilczak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lake Geneva, WI 53147
- Reassigned Medicare billing, Wisconsin and Illinois enrollments
- Also billed through NPI 1598718603 (Wisconsin)
- 271 clinicians in this Medicare group
Harvard, IL 60033
- Reassigned Medicare billing, Illinois enrollment
- 382 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.
Mercy Walworth Hospital & Medical Center
Critical Access Hospitals · Lake Geneva, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53147 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
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 Emily Wilczak's NPI number?
The NPI number for Emily Wilczak is 1386969400. It was assigned to this individual provider in the NPPES registry on March 31, 2010.
Where is Emily Wilczak located?
Emily Wilczak practices at N2950 Wi-67, Lake Geneva, WI 53147. The listed phone number is (815) 229-7580.
What is Emily Wilczak's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Emily Wilczak enrolled in Medicare?
Yes. Emily Wilczak 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 Emily Wilczak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Emily Wilczak reassigns Medicare benefits to 2 organizations: Mercy Health System Corporation (Lake Geneva, WI) and Mercy Harvard Hospital Inc (Harvard, IL). 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 Emily Wilczak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Emily Wilczak accept?
Health plans from Anthem Blue Cross and Blue Shield, MercyCare and MercyCare Health Plans list Emily Wilczak 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 Emily Wilczak affiliated with any hospitals?
According to CMS data, Emily Wilczak is affiliated with Mercy Walworth Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Emily Wilczak was last updated on October 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Emily Kathleen Wilczak, M.D. · NPI 1386969400
Surgery physician in Lake Geneva, Wisconsin. Individual provider, active in the CMS NPPES registry since March 31, 2010.
## Identity
- **NPI:** 1386969400 (Entity type: Individual)
- **Enumerated:** March 31, 2010
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 036136945 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** N2950 WI-67, Lake Geneva, WI 53147
- **Phone:** (815) 229-7580
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mercy Health System Corporation (NPI 1699728550, Lake Geneva, WI); Mercy Harvard Hospital Inc (NPI 1427001445, Harvard, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Human Medicine
## Record status
- **NPPES last updated:** October 18, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1386969400) · Data from the CMS NPPES public registry.