John C. Heyer, DO
Family Medicine Physician · Willowbrook, IL
John C. Heyer, DO is a family medicine physician with a practice address in Willowbrook, Illinois, and NPI 1750310363, issued on Jul 3, 2006. Check the license (Illinois 036057121, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John C. Heyer
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 036057121 IL
02002781A IN
Self-reported in NPPES; status is on the state search - Practice location
- 40 75TH St, Willowbrook, IL 60527
- Phone
- (630) 581-5372
- Enumerated
- Jul 3, 2006
- Record last updated
- Aug 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 100368540 IN
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,215 in Illinois → Look up another NPI →
Also registered at 40 75TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Noor Abutaha, APNFamily Nurse Practitioner1093456568
- Amy Altenberger, FNPFamily Nurse Practitioner1881374700
- George Antonopoulos, APRNFamily Nurse Practitioner1326660069
- Nimmy Baby, FNPFamily Nurse Practitioner1508502980
- Elizabeth BarnesNurse Practitioner1639918923
- Kathleen Barter, FNP-BCFamily Nurse Practitioner1225923857
Verify John C. Heyer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036057121Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average family medicine physician in 2024
182 Medicare Part D claims for 113 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Prednisone17 claims
- Amoxicillin-Clavulanate Potass12 claims
- Losartan Potassium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
John C. Heyer among 6,215 family medicine physician records in Illinois
John C. Heyer, DO is one of 6,215 family medicine physician records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 59% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 family medicine physician records list a practice address in Willowbrook
They are 9 of the 453 NPPES records with a practice address in Willowbrook, and 6,215 family medicine physician records in Illinois.
All 6,215 in Illinois → Every provider in Willowbrook → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Candice Anderson, MDBurr Ridge, IL 605271851361885
- Anthony Bilotta, D.O.Willowbrook, IL 605271407872500
- Dina Desai, M.D.Willowbrook, IL 605271487678454
- Robert Duch, M.D.Burr Ridge, IL 605271609935436
- Sagun Gautam, MDWillowbrook, IL 605271205049046
- Patricia Higgins, D.O.Burr Ridge, IL 605271154476299
- Kiran Joshi, MDWillowbrook, IL 605271437225729
- Kathleen Raschka, M.D.Burr Ridge, IL 605271972779007
Common questions
What is John C. Heyer, DO's NPI number?
John C. Heyer, DO's National Provider Identifier (NPI) is 1750310363, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John C. Heyer, DO located?
The NPPES record lists a practice address at 40 75TH St, Willowbrook, IL, 60527. Phone: (630) 581-5372. Providers update this record themselves, so call before visiting.
How can I verify John C. Heyer, DO's license?
NPPES lists Illinois license number 036057121, as entered by the provider. 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.
How much does John C. Heyer, DO prescribe under Medicare Part D?
In 2024, John C. Heyer, DO had 182 Medicare Part D claims for 113 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.