Amy L. Diestelhorst, M.D.
Obstetrics & Gynecology Physician · Milwaukee, WI
Amy L. Diestelhorst, M.D. is an obstetrics & gynecology physician with a practice address in Milwaukee, Wisconsin, and NPI 1124007901, issued on Jan 11, 2006. Check the license (Wisconsin 45593, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Amy L. Diestelhorst
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 45593 WI
Self-reported in NPPES; status is on the state search - Practice location
- 9200 W Wisconsin Ave, Milwaukee, WI 53226
- Phone
- (414) 805-4777
- Enumerated
- Jan 11, 2006
- Record last updated
- Jan 6, 2025
- Fax
- (414) 805-4774
- Medicaid ID
- 1124007901 WI
- Medicare enrollment
- Enrolled (PECOS I20100116000356); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 796 in Wisconsin → Look up another NPI →
Also registered at 9200 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Abubaker Abdalla, MDHospitalist Physician1194187617
- Sameem Abedin, MDHematology & Oncology Physician1063641157
- Lolia Abibo, M.D.Hospitalist Physician1912359795
- Haisam Abid, MBBSHospitalist Physician1578083184
- Faith Abodunrin, MDHematology & Oncology Physician1437768769
Verify Amy L. Diestelhorst in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 45593Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
59 Medicare Part D claims for 25 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Froedtert Andthe Medical College OF Wisconsin Community Physicians IncMenomonee Falls, WI
- The Medical College OF Wisconsin IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amy L. Diestelhorst among 796 obstetrics & gynecology physician records in Wisconsin
Amy L. Diestelhorst, M.D. is one of 796 obstetrics & gynecology physician records with a practice address in Wisconsin. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 47% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1999 · median 2007 among the 478 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Wisconsin
There are 796 obstetrics & gynecology physician records in Wisconsin.
All 796 in Wisconsin → Every provider in Milwaukee → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Dwight Cruikshank, MDMilwaukee, WI 532261003867169
- Kimberly Gecsi, MDMilwaukee, WI 532261609898857
- Karen Gotwalt, M.D.Wauwatosa, WI 532261225047525
- Kristine Graettinger, M.D.Milwaukee, WI 532261003873399
- Gloria Halverson, MDMilwaukee, WI 532261497706923
- Judith Hibbard, M.D.Milwaukee, WI 532261891734182
- Kathy King, MDMilwaukee, WI 532261770535403
- Timothy Klatt, MDMilwaukee, WI 532261891746632
Common questions
What is Amy L. Diestelhorst, M.D.'s NPI number?
Amy L. Diestelhorst, M.D.'s National Provider Identifier (NPI) is 1124007901, issued on Jan 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Amy L. Diestelhorst, M.D. located?
The NPPES record lists a practice address at 9200 W Wisconsin Ave, Milwaukee, WI, 53226. Phone: (414) 805-4777. Providers update this record themselves, so call before visiting.
How can I verify Amy L. Diestelhorst, M.D.'s license?
NPPES lists Wisconsin license number 45593, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Amy L. Diestelhorst, M.D. prescribe under Medicare Part D?
In 2024, Amy L. Diestelhorst, M.D. had 59 Medicare Part D claims for 25 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.