Quick answers
- Does Joumana T. Chaiban accept Medicare assignment?
- Yes. Medicare's clinician data says Joumana T. Chaiban accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Joumana T. Chaiban see?
- In 2024, CMS data shows 293 Original Medicare patients and 884 services for Joumana T. Chaiban. This counts Original Medicare only and measures volume, not quality.
- What is Joumana T. Chaiban's NPI number?
- 1124233291. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Joumana T. Chaiban, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 293 |
|---|---|
| Services billed to Medicare | 884 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)307 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)142 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)118 services
- Insertion of needle into vein for collection of blood sample (36415)90 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)51 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes75%
- Chronic kidney disease68%
- Ischemic heart disease56%
- Heart failure54%
Hospitals where Joumana T. Chaiban works
Medicare's Facility Affiliation Data lists Joumana T. Chaiban at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140208
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140048
Practice locations
Addresses where Joumana T. Chaiban is enrolled with Medicare (CMS data updated October 2, 2026).
- 11600 S Kedzie AveMerrionette Park, IL 60803 (708) 272‑4150
- 11600 S Kedzie Ave, Suite DMerrionette Park, IL 60803 (708) 272‑4194
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 4440 W 95th StOak Lawn, IL 60453
- 9550 W 167th StOrland Park, IL 60467
Group practices
Medicare enrollment lists Joumana T. Chaiban as a member of this group (CMS data updated October 2, 2026).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Merrionette Park
Clinicians with the same Medicare primary specialty in Merrionette Park, IL — not a recommendation.
Other clinicians in Advocate Health and Hospitals Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124233291 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians