Joyce Gertzen, M.D.
Internal Medicine Physician · Oak Forest, IL
Joyce Gertzen, M.D. is an internal medicine physician with a practice address in Oak Forest, Illinois, and NPI 1588740591, issued on Oct 31, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Joyce Gertzen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 15900 South Cicero Ave, Oak Forest, IL 60452
- Phone
- (708) 687-7200
- Enumerated
- Oct 31, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (708) 633-4136
- Entity
- Type 1 · individual
Also registered at 15900 South Cicero Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rajeswari Chandran, MDAnatomic Pathology & Clinical Pathology Physician1841353174
- Patricia Demarais, MDInfectious Disease Physician1164508107
- Mathew George, M.D.Internal Medicine Physician1124192802
- Susan Harvey, PTAPhysical Therapy Assistant1396084406
- Zaia Lachin, MDInternal Medicine Physician1518029057
- Robert Mahmarian, D.P.M.Foot & Ankle Surgery Podiatrist1184774457
Verify Joyce Gertzen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17 internal medicine physician records list a practice address in Oak Forest
They are 17 of the 308 NPPES records with a practice address in Oak Forest, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17 in Oak Forest → All 7,238 in Illinois → Every provider in Oak Forest →
Other internal medicine physician records in Illinois
- Peter Abadeer, D.O.Bloomington, IL1760469522
- Motaz Abas, MDPeoria, IL1215510201
- Elias Abate, M.D.Chicago, IL1336712199
- Maliha Abbas, D.O.Chicago, IL1174963920
- Zareena Abbas, MDChicago, IL1427078872
- Abu Abbasi, MDChicago, IL1083243877
- Ayesha Abbasi, MDChicago, IL1376216705
- Khalda Abbasi, MDNaperville, IL1487705240
- Elmer Abbo, MDBurr Ridge, IL1710048541
- Paul Abbo, M.D.River Forest, IL1083693378
Common questions
What is Joyce Gertzen, M.D.'s NPI number?
Joyce Gertzen, M.D.'s National Provider Identifier (NPI) is 1588740591, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joyce Gertzen, M.D. located?
The NPPES record lists a practice address at 15900 South Cicero Ave, Oak Forest, IL, 60452. Phone: (708) 687-7200. Providers update this record themselves, so call before visiting.
How can I verify Joyce Gertzen, M.D.'s license?
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.