DR. MARK AARON WILLE M.D.
NPI 1295969111
Urology in Chicago, IL
About Dr. Mark Aaron Wille M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK AARON WILLE M.D. (NPI 1295969111) is an individual urology provider in Chicago, Illinois, licensed in Illinois (036.122340) and active in the NPI registry since May 2009. He is enrolled in Medicare PECOS, is affiliated with Saint Francis Medical Center, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses
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. Mark Aaron Wille 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 Mark Wille reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60612
- Reassigned Medicare billing, Illinois enrollment
- 1,047 clinicians in this Medicare group
Peoria, IL 61615
- Reassigned Medicare billing, Illinois enrollment
- 2,944 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 2
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.
Saint Francis Medical Center
Acute Care Hospitals · Peoria, ILJohn H Stroger Jr Hospital
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 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.
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 Mark Wille's NPI number?
The NPI number for Mark Wille is 1295969111. It was assigned to this individual provider in the NPPES registry on May 6, 2009.
Where is Mark Wille located?
Mark Wille practices at 1900 W Polk St Ste 465, Chicago, IL 60612. The listed phone number is (312) 864-0342.
What is Mark Wille's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is Mark Wille enrolled in Medicare?
Yes. Mark Wille 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 Mark Wille's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Wille reassigns Medicare benefits to 2 organizations: Cook County (Chicago, IL) and Osf Multi-Specialty Group (Peoria, 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 Mark Wille's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Wille accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Mark Wille 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 Mark Wille affiliated with any hospitals?
According to CMS data, Mark Wille is affiliated with Saint Francis Medical Center and John H Stroger Jr Hospital.
When was this NPI record last updated?
The NPPES record for Mark Wille was last updated on May 4, 2021. 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.
# Dr. Mark Aaron Wille, M.D. · NPI 1295969111
Urology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since May 6, 2009.
## Identity
- **NPI:** 1295969111 (Entity type: Individual)
- **Enumerated:** May 6, 2009
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** 036.122340 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1900 W POLK ST STE 465, Chicago, IL 60612-3723
- **Phone:** (312) 864-0342
## 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): Cook County (NPI 1912063439, Chicago, IL); Osf Multi-Specialty Group (NPI 1154908929, Peoria, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** May 4, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1295969111) · Data from the CMS NPPES public registry.