John Thomas Downing, DO
Emergency Medicine Physician · Chicago, IL
John Thomas Downing, DO is an emergency medicine physician with a practice address in Chicago, Illinois, and NPI 1073889242, issued on Apr 1, 2012. Check the license (Illinois 036.140717, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Thomas Downing
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 036.140717 IL
02004823A IN
Self-reported in NPPES; status is on the state search - Practice location
- 836 W Wellington Ave, Chicago, IL 60657
- Phone
- (773) 975-1600
- Enumerated
- Apr 1, 2012
- Record last updated
- Dec 21, 2023
- Medicaid ID
- 201370550 IN
- Medicare enrollment
- Enrolled (PECOS I20160624000639); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 836 W Wellington Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nasser Abualhassan, M.D.Student in an Organized Health Care Education/Training Program1700173127
- Swapnil Adhav, M.D.Surgery Physician1285942292
- Ahsan AdilAnesthesiology Physician1174463772
Verify John Thomas Downing 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 036.140717Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.6 times the Medicare Part D claims of the average emergency medicine physician in 2024
1,049 Medicare Part D claims for 455 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 1% of claims. 39 claims were for opioids.
Most prescribed
- Warfarin Sodium711 claims
- Enoxaparin Sodium57 claims
- Jantoven56 claims
- Hydrocodone-Acetaminophen34 claims
- Cephalexin27 claims
- Ibuprofen18 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.
The MIPS final score for 2023 (Medicare payment program): 99.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Clarksville Emergency Group PCMunster, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thomas Downing among 3,291 emergency medicine physician records in Illinois
John Thomas Downing, DO 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 2012, is newer than 53% of them.
- NPI issued2012 · 53% of these records are older, 44% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2012 · median 2012 among the 1,867 with a school on file
- Record last updated2023 · 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
- Michael Cromeans, M.D.Chicago, IL 606571316978240
- Bikram Dhillon, M.D.Chicago, IL 606571396788006
- Richard Feldman, M.D.Chicago, IL 606571396786844
- Jason Gosnell, M.D.Chicago, IL 606571902807290
- Rahul Khare, MDChicago, IL 606571043248743
- Max Koenigsberg, M.D.Chicago, IL 606571295762250
- Eddie Markul, M.D.Chicago, IL 606571972503886
- Timothy Rittenberry, M.D.Chicago, IL 606571457307555
Common questions
What is John Thomas Downing, DO's NPI number?
John Thomas Downing, DO's National Provider Identifier (NPI) is 1073889242, issued on Apr 1, 2012. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Downing, DO located?
The NPPES record lists a practice address at 836 W Wellington Ave, Chicago, IL, 60657. Phone: (773) 975-1600. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Downing, DO's license?
NPPES lists Illinois license number 036.140717, 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 Thomas Downing, DO prescribe under Medicare Part D?
In 2024, John Thomas Downing, DO had 1,049 Medicare Part D claims for 455 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is John Thomas Downing, DO's MIPS final score?
The 2023 MIPS final score is 99.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.