William Crelin, MD
NPI 1447213475 · Endocrinology, Diabetes & Metabolism Physician · Waukesha, WI
William Crelin, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Waukesha, WI (NPI 1447213475).
Provider details
- NPI number
- 1447213475
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 30195020 (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
- 2006-04-10
- Last updated
- 2013-07-05
Frequently asked questions
- What is William Crelin's NPI number?
- William Crelin's National Provider Identifier (NPI) is 1447213475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Crelin's specialty?
- William Crelin is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is William Crelin located?
- William Crelin's practice location on file with NPPES is 721 American Ave Ste 509, Waukesha, WI 53188-5031.
- What is William Crelin's phone number?
- The practice phone number listed in the NPPES registry for William Crelin is (262) 928-9190.
- Is William Crelin's NPI active?
- Yes — William Crelin's NPI (1447213475) is active in the NPPES registry as of the last update on 2013-07-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.