Dr. William Leach DO
About this NPIWhat this record shows.
NPI 1558399279 is registered to Dr. William Leach DO, a Obstetrics & Gynecology practising at 600 York St in Manitowoc, Wisconsin. Obstetricians and Gynecologists (OB/GYNs) provide medical and surgical care for the female reproductive system, including pregnancy, childbirth, and gynecologic conditions. Dr. William Leach DO has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Beyond the registryWhat this record adds.
It is enrolled in Medicare, linking to 2 PECOS enrollment records (each with a public Medicare Enrollment ID) sourced from CMS, which the NPPES registry does not list. Within the directory it is one of 866 Obstetrics & Gynecology providers on file in Wisconsin.
Source: CMS NPPES and PECOS public files. snapshot, refreshed monthly.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20060808000330Obstetrics/GynecologyWI
- I20231117002212Obstetrics/GynecologyIL
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. William Leach DO accepts. To confirm in-network status with your specific health plan, contact Dr. William Leach DO directly at (920) 320-8742.
Frequently asked
Yes. NPI 1558399279 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Obstetricians and Gynecologists (OB/GYNs) provide medical and surgical care for the female reproductive system, including pregnancy, childbirth, and gynecologic conditions.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (920) 320-8742.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. William Leach DO is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 866 Obstetrics & Gynecology providers are registered in Wisconsin, and Dr. William Leach DO is one of them. The figure refreshes each month from the federal source.