DR. KATHLEEN SHIFLEY WILLIAMS M.D.
NPI 1881993053
Emergency Medicine in Milwaukee, WI
About Dr. Kathleen Shifley Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. KATHLEEN SHIFLEY WILLIAMS M.D. (NPI 1881993053) is an individual emergency medicine provider in Milwaukee, Wisconsin, licensed in Wisconsin (60612-20) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 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 (PECOS)
Dr. Kathleen Shifley Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Kathleen Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53226
- Reassigned Medicare billing, Wisconsin enrollment
- 3,983 clinicians in this Medicare group
Menomonee Falls, WI 53051
- Reassigned Medicare billing, Wisconsin enrollment
- 2,294 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 3
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53226 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.
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
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 Kathleen Williams's NPI number?
The NPI number for Kathleen Williams is 1881993053. It was assigned to this individual provider in the NPPES registry on March 27, 2011. The provider is also known as Kathleen Dinan Shifley.
Where is Kathleen Williams located?
Kathleen Williams practices at 9200 W Wisconsin Ave Emergency Medicine, Milwaukee, WI 53226. The listed phone number is (414) 805-6450.
What is Kathleen Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Kathleen Williams enrolled in Medicare?
Yes. Kathleen Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Kathleen Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kathleen Williams reassigns Medicare benefits to 2 organizations: The Medical College Of Wisconsin, Inc. (Milwaukee, WI) and Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (Menomonee Falls, 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 Kathleen Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kathleen Williams accept?
Health plans from Anthem Blue Cross and Blue Shield list Kathleen Williams 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.
When was this NPI record last updated?
The NPPES record for Kathleen Williams was last updated on July 14, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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. Kathleen Shifley Williams, M.D. · NPI 1881993053
Emergency Medicine physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since March 27, 2011.
## Identity
- **NPI:** 1881993053 (Entity type: Individual)
- **Enumerated:** March 27, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 60612-20 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 9200 W WISCONSIN AVE, EMERGENCY MEDICINE, Milwaukee, WI 53226-3522
- **Phone:** (414) 805-6450 · **Fax:** (414) 805-6464
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): The Medical College Of Wisconsin, Inc. (NPI 1699720086, Milwaukee, WI); Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (NPI 1568787448, Menomonee Falls, WI) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 14, 2014
- **Other identifiers:** Medicaid 1881993053 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1881993053) · Data from the CMS NPPES public registry.