William Coyer, MD
NPI 1356316467 · Neonatal-Perinatal Medicine Physician · Glen Ellyn, IL
William Coyer, MD is a Neonatal-Perinatal Medicine Physician provider in Glen Ellyn, IL (NPI 1356316467).
Provider details
- NPI number
- 1356316467
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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
83% 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
- 2006-02-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Coyer's NPI number?
- William Coyer's National Provider Identifier (NPI) is 1356316467, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Coyer's specialty?
- William Coyer is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Coyer located?
- William Coyer's practice location on file with NPPES is 454 Pennsylvania Ave, Glen Ellyn, IL 60137-4418.
- What is William Coyer's phone number?
- The practice phone number listed in the NPPES registry for William Coyer is (630) 469-9200.
- Is William Coyer's NPI active?
- Yes — William Coyer's NPI (1356316467) 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.