William C. Leach, DO
Obstetrics & Gynecology Physician · Manitowoc, WI
William C. Leach, DO is an obstetrics & gynecology physician with a practice address in Manitowoc, Wisconsin, and NPI 1558399279, issued on Jun 29, 2006. Check the license (Wisconsin 46781, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William C. Leach
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 46781 WI
Self-reported in NPPES; status is on the state search - Practice location
- 600 York St, Manitowoc, WI 54220
- Phone
- (920) 320-8742
- Enumerated
- Jun 29, 2006
- Record last updated
- Apr 20, 2023
- Fax
- (920) 320-8775
- Medicare enrollment
- Enrolled (PECOS I20231117002212); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 796 in Wisconsin → Look up another NPI →
Also registered at 600 York St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Erin Granger, OTRPediatric Occupational Therapist1518997998
- Naomi Grimm, OTRPediatric Occupational Therapist1770513129
- Paula Johnson, M.S. CCC/SLPSpeech-Language Pathologist1265462600
- Christopher Kania, DDSDentist1659431724
Verify William C. Leach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 46781Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
114 Medicare Part D claims for 49 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Estradiol29 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 one group practice
- Mercy Health System CorporationCrystal Lake, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William C. Leach among 796 obstetrics & gynecology physician records in Wisconsin
William C. Leach, DO 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
- Graduated2002 · 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).
Obstetrics & Gynecology Physician providers in Wisconsin
There are 796 obstetrics & gynecology physician records in Wisconsin.
All 796 in Wisconsin → Every provider in Manitowoc → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Stephanie Grosvenor, D.O.Manitowoc, WI 542201912193640
- Robert Hetz, MDManitowoc, WI 542201558346866
- Sivakami Kangayappan, M.DManitowoc, WI 542201851523492
- Dorene Dempster, M.D.Sturgeon Bay, WI 542351518976927
- Elizabeth Gaida, MDSturgeon Bay, WI 542351699966317
- Shawn Laibly, MDSturgeon Bay, WI 542351043322266
- Kali Olson, MD, MPHSturgeon Bay, WI 542351831771583
- Ronald Pluszczynski, M.D.Sturgeon Bay, WI 542351952303919
Common questions
What is William C. Leach, DO's NPI number?
William C. Leach, DO's National Provider Identifier (NPI) is 1558399279, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William C. Leach, DO located?
The NPPES record lists a practice address at 600 York St, Manitowoc, WI, 54220. Phone: (920) 320-8742. Providers update this record themselves, so call before visiting.
How can I verify William C. Leach, DO's license?
NPPES lists Wisconsin license number 46781, 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 William C. Leach, DO prescribe under Medicare Part D?
In 2024, William C. Leach, DO had 114 Medicare Part D claims for 49 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.