Quick answers
- Does Zakaria Sibai accept Medicare assignment?
- Yes. Medicare's clinician data says Zakaria Sibai 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 Zakaria Sibai see?
- In 2024, CMS data shows 136 Original Medicare patients and 462 services for Zakaria Sibai. This counts Original Medicare only and measures volume, not quality.
- What is Zakaria Sibai's NPI number?
- 1346763331. 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 Zakaria Sibai, 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 | 136 |
|---|---|
| Services billed to Medicare | 462 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 66 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)120 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)106 services
- Blood glucose (sugar) test performed by hand-held instrument (82962)69 services
- Hemoglobin a1c level (83036)54 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)34 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%
- Arthritis55%
- Chronic kidney disease54%
- Anxiety46%
Hospitals where Zakaria Sibai works
Medicare's Facility Affiliation Data lists Zakaria Sibai 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.
- UChicago Medicine AdventHealth BolingbrookBolingbrook, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140304
- UChicago Medicine AdventHealth GlenoaksGlendale Heights, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140292
- UChicago Medicine AdventHealth HinsdaleHinsdale, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140122
- UChicago Medicine AdventHealth La GrangeLa Grange, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140065
Practice locations
Addresses where Zakaria Sibai is enrolled with Medicare (CMS data updated October 2, 2026).
- 2363 63rd StWoodridge, IL 60517 (630) 716‑7510
- 911 N Elm St, Suite 123Hinsdale, IL 60521 (630) 325‑5709
Group practices
Medicare enrollment lists Zakaria Sibai as a member of this group (CMS data updated October 2, 2026).
- Adventist Health Partners, Inc.255 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Adventist Health Partners, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346763331 |
| 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