AILEEN J SANTOS NP
NPI 1336659119
Nurse Practitioner in Lake Geneva, WI
About Aileen J Santos Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AILEEN J SANTOS NP (NPI 1336659119) is an individual nurse practitioner in Lake Geneva, Wisconsin, licensed in Wisconsin (1353933) and active in the NPI registry since October 2017. She is enrolled in Medicare PECOS, is affiliated with Mercy Walworth Hospital & Medical Center, and maintains a secondary practice location in Lincolnshire.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Aileen J Santos Np 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 Aileen Santos 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 enrollment
- Also billed through NPI 1598718603 (Wisconsin)
- 271 clinicians in this Medicare group
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 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 20
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 Aileen Santos's NPI number?
The NPI number for Aileen Santos is 1336659119. It was assigned to this individual provider in the NPPES registry on October 5, 2017.
Where is Aileen Santos located?
Aileen Santos practices at N2950 State Road 67, Lake Geneva, WI 53147. The listed phone number is (262) 245-0535.
What is Aileen Santos's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Aileen Santos enrolled in Medicare?
Yes. Aileen Santos 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 Aileen Santos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aileen Santos reassigns Medicare benefits to 2 organizations: Mercy Health System Corporation (Lake Geneva, WI) and Endeavor Health Medical Group (Evanston, 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 Aileen Santos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aileen Santos accept?
Health plans from Anthem Blue Cross and Blue Shield list Aileen Santos 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 Aileen Santos affiliated with any hospitals?
According to CMS data, Aileen Santos is affiliated with Mercy Walworth Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Aileen Santos was last updated on July 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Aileen J Santos, NP · NPI 1336659119
Nurse Practitioner physician in Lake Geneva, Wisconsin. Individual provider, active in the CMS NPPES registry since October 5, 2017.
## Identity
- **NPI:** 1336659119 (Entity type: Individual)
- **Enumerated:** October 5, 2017
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 1353933 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** N2950 STATE ROAD 67, Lake Geneva, WI 53147-2655
- **Phone:** (262) 245-0535
## 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); Endeavor Health Medical Group (NPI 1265695944, Evanston, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** July 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1336659119) · Data from the CMS NPPES public registry.