John J. Gnap, MD
Addiction Medicine (Family Medicine) Physician · Chicago Ridge, IL
John J. Gnap, MD is an addiction medicine (family medicine) physician with a practice address in Chicago Ridge, Illinois, and NPI 1164572319, issued on Jan 11, 2007. Check the license (Illinois 036040753, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John J. Gnap
- Credential
- MD
- Primary taxonomy
- Addiction Medicine (Family Medicine) Physician 207QA0401X
- License number
- 036040753 IL
Self-reported in NPPES; status is on the state search - Practice location
- 10436 Southwest Highway, Chicago Ridge, IL 60415
- Phone
- (708) 424-2266
- Enumerated
- Jan 11, 2007
- Record last updated
- Mar 30, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (708) 424-9763
- Entity
- Type 1 · individual
Also registered at 10436 Southwest Highway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John J. Gnap 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 036040753Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Addiction Medicine (Family Medicine) Physician providers in Illinois
There are 26 addiction medicine (family medicine) physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other addiction medicine (family medicine) physician records in Illinois
- Katherine Austman, MDGibson City, IL1396739462
- Michael Blain, D.O.Eldorado, IL1801076146
- Britt Borden, M.D.Chicago, IL1841251378
- Mary Buswell, MDChicago, IL1730766387
- Dora Dixie, MDChicago, IL1225092919
- Beth Dunlap, MDChicago, IL1821319419
- Risha Fennell, MDSpringfield, IL1487622379
- Ruchi Fitzgerald, M.D.Chicago, IL1720060072
- Shalu Gugnani, M.D.Arlington Heights, IL1629238746
- Raza Hussain, M.D.Decatur, IL1891960431
Common questions
What is John J. Gnap, MD's NPI number?
John J. Gnap, MD's National Provider Identifier (NPI) is 1164572319, issued on Jan 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John J. Gnap, MD located?
The NPPES record lists a practice address at 10436 Southwest Highway, Chicago Ridge, IL, 60415. Phone: (708) 424-2266. Providers update this record themselves, so call before visiting.
How can I verify John J. Gnap, MD's license?
NPPES lists Illinois license number 036040753, 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.
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.