Gregory Lewis Katzman, MD
Diagnostic Radiology Physician · Chicago, IL
Gregory Lewis Katzman, MD is a diagnostic radiology physician with a practice address in Chicago, Illinois, and NPI 1831286889, issued on Oct 9, 2006. Check the license (Illinois 036.099456, 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
- Gregory Lewis Katzman
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 036.099456 IL
Self-reported in NPPES; status is on the state search - Practice location
- 5841 S Maryland Ave, Chicago, IL 60637
- Phone
- (773) 834-0521
- Enumerated
- Oct 9, 2006
- Record last updated
- Mar 22, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,874 in Illinois → Look up another NPI →
Also registered at 5841 S Maryland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ma. Theresa Abaring, CRNACertified Registered Nurse Anesthetist1962647586
- Rouzbeh AbbasgholizadehRetina Specialist (Ophthalmology) Physician1881510030
- Jehad Abdalla, MDSleep Medicine (Internal Medicine) Physician1053898684
- Sara Abdelaziz, MDEndocrinology, Diabetes & Metabolism Physician1598258089
- Noor Abdelrahman, PA-CPhysician Assistant1851012413
- Unknown Abdul Hanan, MDBlood Banking & Transfusion Medicine Physician1750022240
Verify Gregory Lewis Katzman 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 036.099456Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory Lewis Katzman among 1,874 diagnostic radiology physician records in Illinois
Gregory Lewis Katzman, MD is one of 1,874 diagnostic radiology physician records with a practice address in Illinois. 71% 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 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 54% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2018 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Illinois
There are 1,874 diagnostic radiology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,874 in Illinois → Every provider in Chicago → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Ruth Ceulemans, MDChicago, IL 606371730140062
- Paul ChangChicago, IL 606371023080983
- Brian FunakiChicago, IL 606371356492326
- Carla HarmathChicago, IL 606371962486639
- Luis LanderasChicago, IL 606371659304855
- Grace LeeChicago, IL 606371437121472
- Jeffrey LeefChicago, IL 606371174674147
- Seng Ong, MDChicago, IL 606371861441693
Common questions
What is Gregory Lewis Katzman, MD's NPI number?
Gregory Lewis Katzman, MD's National Provider Identifier (NPI) is 1831286889, issued on Oct 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Lewis Katzman, MD located?
The NPPES record lists a practice address at 5841 S Maryland Ave, Chicago, IL, 60637. Phone: (773) 834-0521. Providers update this record themselves, so call before visiting.
How can I verify Gregory Lewis Katzman, MD's license?
NPPES lists Illinois license number 036.099456, 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.