George Ou, MD
Gastroenterology Physician · Chicago, IL
George Ou, MD is a gastroenterology physician with a practice address in Chicago, Illinois, and NPI 1770004590, issued on Jun 30, 2017. Check the license (Illinois 036.142865, 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
- George Ou
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 036.142865 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave # 4076, Chicago, IL 60637
- Phone
- (773) 702-8597
- Enumerated
- Jun 30, 2017
- Record last updated
- Jul 1, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (773) 702-0963
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 887 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave # 4076
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allison Malick, MDPhysician Nutrition Specialist (Internal Medicine)1629609664
Verify George Ou 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 036.142865Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
George Ou among 887 gastroenterology physician records in Illinois
George Ou, MD is one of 887 gastroenterology physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2017, is newer than 82% of them.
- NPI issued2017 · 82% of these records are older, 14% newer
- In a Medicare fileNo · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2017 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Illinois
There are 887 gastroenterology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 887 in Illinois → Every provider in Chicago → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Russell CohenChicago, IL 606371336201888
- Ira HananChicago, IL 606371184787608
- Frank Hoentjen, MD PHDChicago, IL 606371114248101
- Robert KavittChicago, IL 606371205023611
- Karen KimChicago, IL 606371942362496
- Sonia KupferChicago, IL 606371588726038
- Shikha Mangla, M.D.Chicago, IL 606371518121383
- Edwin McDonaldChicago, IL 606371831346774
Common questions
What is George Ou, MD's NPI number?
George Ou, MD's National Provider Identifier (NPI) is 1770004590, issued on Jun 30, 2017. An NPI identifies a provider in billing; it is not a license.
Where is George Ou, MD located?
The NPPES record lists a practice address at 5841 S Maryland Ave # 4076, Chicago, IL, 60637. Phone: (773) 702-8597. Providers update this record themselves, so call before visiting.
How can I verify George Ou, MD's license?
NPPES lists Illinois license number 036.142865, 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.