William Coyer, MD
Neonatal-Perinatal Medicine Physician · Glen Ellyn, IL
William Coyer, MD is a neonatal-perinatal medicine physician with a practice address in Glen Ellyn, Illinois, and NPI 1356316467, issued on Feb 22, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Coyer
- Credential
- MD
- Primary taxonomy
- Neonatal-Perinatal Medicine Physician 2080N0001X
- Practice location
- 454 Pennsylvania Ave, Glen Ellyn, IL 60137
- Phone
- (630) 469-9200
- Enumerated
- Feb 22, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest neonatal-perinatal medicine physician records → All 362 in Illinois → Look up another NPI →
Also registered at 454 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Coyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Coyer among 362 neonatal-perinatal medicine physician records in Illinois
William Coyer, MD is one of 362 neonatal-perinatal medicine physician records with a practice address in Illinois. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileNo · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2007 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080N0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neonatal-Perinatal Medicine Physician providers in Illinois
There are 362 neonatal-perinatal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 362 in Illinois → Every provider in Glen Ellyn → Neonatal-Perinatal Medicine Physician nationwide →
The 8 neonatal-perinatal medicine physician records with the nearest ZIP codes
- Tahmineh Abbasian, M.D.Glen Ellyn, IL 601371093716276
- Jayshree Vajaria, MDGlen Ellyn, IL 601371144280769
- Brett Galley, M.D.Huntley, IL 601421114131919
- John Hartline, MDItasca, IL 601431447516257
- Lawrence Bennett, MDMaywood, IL 601531710951868
- Stephen Co, MDMaywood, IL 601531164496485
- Jessica Corsino, MDMaywood, IL 601531326012642
- Dalia Feltman, M.D.Maywood, IL 601531699798454
Common questions
What is William Coyer, MD's NPI number?
William Coyer, MD's National Provider Identifier (NPI) is 1356316467, issued on Feb 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Coyer, MD located?
The NPPES record lists a practice address at 454 Pennsylvania Ave, Glen Ellyn, IL, 60137. Phone: (630) 469-9200. Providers update this record themselves, so call before visiting.
How can I verify William Coyer, MD's license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.