William Leach, M.D.
NPI 1124013891 · Pediatrics Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Leach, M.D. is a Pediatrics Physician provider in Milwaukee, WI (NPI 1124013891).
Provider details
- NPI number
- 1124013891
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 25333 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Leach's NPI number?
- William Leach's National Provider Identifier (NPI) is 1124013891, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Leach's specialty?
- William Leach is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is William Leach located?
- William Leach's practice location on file with NPPES is 10909 W Bluemound Rd, Milwaukee, WI 53226-4247.
- What is William Leach's phone number?
- The practice phone number listed in the NPPES registry for William Leach is (414) 258-0606.
- Does William Leach accept Medicare?
- William Leach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Leach's NPI active?
- Yes — William Leach's NPI (1124013891) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.