AMY L DIESTELHORST M.D.
NPI 1124007901
Obstetrics & Gynecology in Milwaukee, WI
About Amy L Diestelhorst M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMY L DIESTELHORST M.D. (NPI 1124007901) is an individual obstetrics & gynecology provider in Milwaukee, Wisconsin, licensed in Wisconsin (45593) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS, maintains a secondary practice location in Menomonee Falls, and is a graduate of Saint Louis University School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
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
Amy L Diestelhorst 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 Amy Diestelhorst 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.
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 Amy Diestelhorst's NPI number?
The NPI number for Amy Diestelhorst is 1124007901. It was assigned to this individual provider in the NPPES registry on January 11, 2006.
Where is Amy Diestelhorst located?
Amy Diestelhorst practices at 9200 W Wisconsin Ave, Milwaukee, WI 53226. The listed phone number is (414) 805-4777.
What is Amy Diestelhorst's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Amy Diestelhorst enrolled in Medicare?
Yes. Amy Diestelhorst 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 Amy Diestelhorst's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Amy Diestelhorst 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 Amy Diestelhorst's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Amy Diestelhorst accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners and Network Health list Amy Diestelhorst 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 Amy Diestelhorst was last updated on January 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.
# Amy L Diestelhorst, M.D. · NPI 1124007901
Obstetrics & Gynecology physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since January 11, 2006.
## Identity
- **NPI:** 1124007901 (Entity type: Individual)
- **Enumerated:** January 11, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 45593 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 9200 W WISCONSIN AVE, Milwaukee, WI 53226-3522
- **Phone:** (414) 805-4777 · **Fax:** (414) 805-4774
## 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): 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
- **Medical school:** Saint Louis University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** January 6, 2025
- **Other identifiers:** Medicaid 1124007901 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1124007901) · Data from the CMS NPPES public registry.