Sarah Amherdt, MD
Obstetrics & Gynecology Physician · Waukesha, WI
Sarah Amherdt, MD is an obstetrics & gynecology physician with a practice address in Waukesha, Wisconsin, and NPI 1861953861, issued on Mar 31, 2019. Check the license (Wisconsin 74691-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Sarah Amherdt
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 74691-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 721 American Ave Ste 304, Waukesha, WI 53188
- Phone
- (262) 549-2229
- Enumerated
- Mar 31, 2019
- Record last updated
- Oct 23, 2023
- Fax
- (262) 549-1657
- Medicare enrollment
- Enrolled (PECOS I20230825002935); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2019
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 796 in Wisconsin → Look up another NPI →
Also registered at 721 American Ave Ste 304
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kristine Sullivan, MDObstetrics & Gynecology Physician1316365331
Verify Sarah Amherdt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 74691-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
61 Medicare Part D claims for 31 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol25 claims
- Norethindrone Acetate12 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.
Industry payments in 2024: $1,116.00
2 payments; by number, the most common kind was consulting fee; the largest payer was GE Healthcare. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Women's Health Care, SCWaukesha, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sarah Amherdt among 796 obstetrics & gynecology physician records in Wisconsin
Sarah Amherdt, MD 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 2019, is newer than 88% of them.
- NPI issued2019 · 88% of these records are older, 10% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2019 · median 2007 among the 478 with a school on file
- Record last updated2023 · 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).
29 obstetrics & gynecology physician records list a practice address in Waukesha
They are 29 of the 2,814 NPPES records with a practice address in Waukesha, and 796 obstetrics & gynecology physician records in Wisconsin.
All 796 in Wisconsin → Every provider in Waukesha → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Dana Akiya, MDWaukesha, WI 531881407915796
- Beth Angsten, M.D.Waukesha, WI 531881174596217
- Joi Davis, DOWaukesha, WI 531881932172988
- Lorree Dyoco, MDWaukesha, WI 531881497728448
- Laura Epperson, MDWaukesha, WI 531881225028715
- Darin Gregory, MDWaukesha, WI 531881023189198
- Jessica Herzberg, MDWaukesha, WI 531881750570180
- Sarah Janz, M.D.Waukesha, WI 531881336367168
Common questions
What is Sarah Amherdt, MD's NPI number?
Sarah Amherdt, MD's National Provider Identifier (NPI) is 1861953861, issued on Mar 31, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Amherdt, MD located?
The NPPES record lists a practice address at 721 American Ave Ste 304, Waukesha, WI, 53188. Phone: (262) 549-2229. Providers update this record themselves, so call before visiting.
How can I verify Sarah Amherdt, MD's license?
NPPES lists Wisconsin license number 74691-20, 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 Sarah Amherdt, MD prescribe under Medicare Part D?
In 2024, Sarah Amherdt, MD had 61 Medicare Part D claims for 31 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.