MARGARET KATHERINE WALKER DPT
NPI 1487382214
Physical Therapist in Greenfield, WI
About Margaret Katherine Walker Dpt NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET KATHERINE WALKER DPT (NPI 1487382214) is an individual physical therapist in Greenfield, Wisconsin, licensed in Wisconsin (16053) and active in the NPI registry since August 2022. She maintains a secondary practice location in Oak Creek and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
- Diagnose and manage movement dysfunction and enhance physical and functional abilities.
- Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health.
- Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.
- Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.
- Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.
Secondary Practice Location 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 and accepts Medicare assignment
Margaret Katherine Walker Dpt 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
6Medicare enrollment records show Margaret Walker reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53215
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 clinicians in this Medicare group
Saint Francis, WI 53235
- Reassigned Medicare billing, Wisconsin enrollment
- 960 clinicians in this Medicare group
Milwaukee, WI 53202
- Reassigned Medicare billing, Wisconsin enrollment
- 5 clinicians in this Medicare group
Milwaukee, WI 53216
- Reassigned Medicare billing, Wisconsin enrollment
- 52 clinicians in this Medicare group
Milwaukee, WI 53209
- Reassigned Medicare billing, Wisconsin enrollment
- 1,615 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 4
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 53221 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 5
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 Margaret Walker's NPI number?
The NPI number for Margaret Walker is 1487382214. It was assigned to this individual provider in the NPPES registry on August 10, 2022.
Where is Margaret Walker located?
Margaret Walker practices at 4131 W Loomis Rd Ste 200, Greenfield, WI 53221. The listed phone number is (414) 422-2191.
What is Margaret Walker's specialty?
The primary specialty registered for this NPI is Physical Therapist with taxonomy code 225100000X.
Is Margaret Walker enrolled in Medicare?
Yes. Margaret Walker 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 Margaret Walker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Walker reassigns Medicare benefits to 6 organizations: Aurora Medical Group, Inc. (Milwaukee, WI), Lakeshore Medical Clinic, LLC (Saint Francis, WI), Vita Physical Therapy Sc (Milwaukee, WI), Independent Physicians Of Wisconsin, LLC (Milwaukee, WI), Aurora Advanced Healthcare, Inc. (Milwaukee, WI) and 1 more organization, listed in the Medicare section above. 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 Margaret Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Walker accept?
Health plans from CareSource (Common Ground Healthcare) list Margaret Walker 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 Margaret Walker was last updated on January 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Margaret Katherine Walker, DPT · NPI 1487382214
Physical Therapist provider in Greenfield, Wisconsin. Individual provider, active in the CMS NPPES registry since August 10, 2022.
## Identity
- **NPI:** 1487382214 (Entity type: Individual)
- **Enumerated:** August 10, 2022
- **Primary specialty:** Physical Therapist · taxonomy 225100000X
- **State license:** 16053 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 4131 W LOOMIS RD STE 200, Greenfield, WI 53221-2041
- **Phone:** (414) 422-2191
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Aurora Medical Group, Inc. (NPI 1427271378, Milwaukee, WI); Lakeshore Medical Clinic, LLC (NPI 1003861188, Saint Francis, WI); Vita Physical Therapy Sc (NPI 1255386454, Milwaukee, WI); Independent Physicians Of Wisconsin, LLC (NPI 1871975920, Milwaukee, WI); Aurora Advanced Healthcare, Inc. (NPI 1265629133, Milwaukee, WI); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** January 22, 2026
- **Other identifiers:** Medicaid 100213891 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1487382214) · Data from the CMS NPPES public registry.