John Bolton Gillett, M.D.
Emergency Medicine Physician · Chicago, IL
John Bolton Gillett, M.D. is an emergency medicine physician with a practice address in Chicago, Illinois, and NPI 1316253487, issued on Aug 26, 2010. Check the license (Illinois 125058923, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Bolton Gillett
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 125058923 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1900 W Polk St, Chicago, IL 60612
- Phone
- (312) 864-0060
- Enumerated
- Aug 26, 2010
- Record last updated
- Aug 26, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (312) 864-9656
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 1900 W Polk St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carmen Adams, M.D.Obstetrics & Gynecology Physician1972864338
- Sarah Ahmed, CRNACertified Registered Nurse Anesthetist1023395134
- Steven Aks, DOMedical Toxicology (Emergency Medicine) Physician1295810356
- Irene Aluen Metzner, M.D.Internal Medicine Physician1063698819
- Alejandra Argueta, PA-CPhysician Assistant1407980337
- Annamarie Arias, M.D.Pediatrics Physician1851731756
Verify John Bolton Gillett 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 125058923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average emergency medicine physician in 2024
105 Medicare Part D claims for 79 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Nitrofurantoin Mono-Macro15 claims
- Hydrocodone-Acetaminophen14 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 Bolton Gillett among 3,291 emergency medicine physician records in Illinois
John Bolton Gillett, M.D. is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 47% of them.
- NPI issued2010 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2010 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,310 emergency medicine physician records list a practice address in Chicago
They are 1,310 of the 63,379 NPPES records with a practice address in Chicago, and 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Chicago → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Joseph Brawka, M.D.Chicago, IL 606121174599112
- Christopher Caudill, MDChicago, IL 606121013993104
- Galeta Clayton, M.D.Chicago, IL 606121588630743
- Jennifer Fleming, M.D.Chicago, IL 606121912973975
- Jeffrey Grassle, M.D.Chicago, IL 606121205802147
- Marilyn Hallock, M.D.Chicago, IL 606121336110691
- Mumtaz Husain, M.D.Chicago, IL 606121891761953
- Paula Oldeg, M.D.Chicago, IL 606121568438687
Common questions
What is John Bolton Gillett, M.D.'s NPI number?
John Bolton Gillett, M.D.'s National Provider Identifier (NPI) is 1316253487, issued on Aug 26, 2010. An NPI identifies a provider in billing; it is not a license.
Where is John Bolton Gillett, M.D. located?
The NPPES record lists a practice address at 1900 W Polk St, Chicago, IL, 60612. Phone: (312) 864-0060. Providers update this record themselves, so call before visiting.
How can I verify John Bolton Gillett, M.D.'s license?
NPPES lists Illinois license number 125058923, 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 Bolton Gillett, M.D. prescribe under Medicare Part D?
In 2024, John Bolton Gillett, M.D. had 105 Medicare Part D claims for 79 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.