KATHERINE LYNN WILHELM DNP, AG-ACNP
NPI 1871227462
Nurse Practitioner in Chicago, IL
About Katherine Lynn Wilhelm Dnp, Ag-acnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KATHERINE LYNN WILHELM DNP, AG-ACNP (NPI 1871227462) is an individual nurse practitioner in Chicago, Illinois, licensed in Illinois (209033398) and active in the NPI registry since July 2022. She is enrolled in Medicare PECOS, is affiliated with Northwestern Memorial Hospital, and is a graduate of University Of Kentucky College Of Medicine (2021).
NPPES Registry Identity
Specialties & Licenses 2
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
Katherine Lynn Wilhelm Dnp, Ag-acnp 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 Katherine Wilhelm reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 1,001 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.
Northwestern Memorial Hospital
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60611 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.
CHICAGO, IL 60611
CHICAGO, IL 60611
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 Katherine Wilhelm's NPI number?
The NPI number for Katherine Wilhelm is 1871227462. It was assigned to this individual provider in the NPPES registry on July 11, 2022.
Where is Katherine Wilhelm located?
Katherine Wilhelm practices at 676 N Saint Clair St Ste 2140, Chicago, IL 60611. The listed phone number is (312) 695-3800.
What is Katherine Wilhelm's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Katherine Wilhelm enrolled in Medicare?
Yes. Katherine Wilhelm 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 Katherine Wilhelm's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Katherine Wilhelm reassigns Medicare benefits to 2 organizations: Northwestern Medical Faculty Foundation (Carol Stream, IL) and Cedars-Sinai Medical Center (Los Angeles, CA). 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 Katherine Wilhelm's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Katherine Wilhelm affiliated with any hospitals?
According to CMS data, Katherine Wilhelm is affiliated with Northwestern Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Katherine Wilhelm was last updated on March 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.
# Katherine Lynn Wilhelm, DNP, AG-ACNP · NPI 1871227462
Nurse Practitioner physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since July 11, 2022.
## Identity
- **NPI:** 1871227462 (Entity type: Individual)
- **Enumerated:** July 11, 2022
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 209033398 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 676 N SAINT CLAIR ST STE 2140, Chicago, IL 60611-3143
- **Phone:** (312) 695-3800 · **Fax:** (312) 695-3644
## 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): Northwestern Medical Faculty Foundation (NPI 1346235314, Carol Stream, IL); Cedars-Sinai Medical Center (NPI 1639172372, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Kentucky College Of Medicine, class of 2021
## Record status
- **NPPES last updated:** March 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1871227462) · Data from the CMS NPPES public registry.