John Hayden Sonnier, MD
Pediatrics Physician · Chicago, IL
John Hayden Sonnier, MD is a pediatrics physician with a practice address in Chicago, Illinois, and NPI 1053005025, issued on Jun 5, 2023. Check the license (Illinois 125.083394, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Hayden Sonnier
- Credential
- MD
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 125.083394 IL
Self-reported in NPPES; status is on the state search - Practice location
- 225 E Chicago Ave, Chicago, IL 60611
- Phone
- (312) 227-4000
- Enumerated
- Jun 5, 2023
- Record last updated
- Jun 19, 2024
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 3,176 in Illinois → Look up another NPI →
Also registered at 225 E Chicago Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jasmene Abernathy, MDStudent in an Organized Health Care Education/Training Program1881454957
- Tamkeen Abreu, PHARMD, BCPSPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1366888653
- Matthew Abts, MDPediatric Pulmonology Physician1588989750
- Samuel AccordinoStudent in an Organized Health Care Education/Training Program1194525204
- Carly Adajian, DDSDentist1184373029
- Julie Adams, RDRegistered Dietitian1417569153
Verify John Hayden Sonnier 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 125.083394Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average pediatrics physician in 2024
37 Medicare Part D claims for 14 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole13 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 Hayden Sonnier among 3,176 pediatrics physician records in Illinois
John Hayden Sonnier, MD is one of 3,176 pediatrics physician records with a practice address in Illinois. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 90% of them.
- NPI issued2023 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2024 · 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 208000000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,142 pediatrics physician records list a practice address in Chicago
They are 1,142 of the 63,379 NPPES records with a practice address in Chicago, and 3,176 pediatrics physician records in Illinois.
All 3,176 in Illinois → Every provider in Chicago → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Kavita Alford, M.D.Chicago, IL 606111356399984
- Helen Binns, MD MPHChicago, IL 606111619945094
- Rebecca Carl, M.D.Chicago, IL 606111689639957
- Joel Frader, MDChicago, IL 606111871561340
- Maureen Haugen, APN NPChicago, IL 606111952359655
- David Jung, M.D.Chicago, IL 606111851380943
- Osama Kattih, M.D.Chicago, IL 606111437148558
- Deepa Nair, MDChicago, IL 606111265498885
Common questions
What is John Hayden Sonnier, MD's NPI number?
John Hayden Sonnier, MD's National Provider Identifier (NPI) is 1053005025, issued on Jun 5, 2023. An NPI identifies a provider in billing; it is not a license.
Where is John Hayden Sonnier, MD located?
The NPPES record lists a practice address at 225 E Chicago Ave, Chicago, IL, 60611. Phone: (312) 227-4000. Providers update this record themselves, so call before visiting.
How can I verify John Hayden Sonnier, MD's license?
NPPES lists Illinois license number 125.083394, 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 Hayden Sonnier, MD prescribe under Medicare Part D?
In 2024, John Hayden Sonnier, MD had 37 Medicare Part D claims for 14 beneficiaries; the average among pediatrics physician prescribers was 375. 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.