DR. ZAKARIA SIBAI MD
NPI 1346763331
Internal Medicine - Endocrinology, Diabetes & Metabolism in Hinsdale, IL
About Dr. Zakaria Sibai Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ZAKARIA SIBAI MD (NPI 1346763331) is an individual endocrinology, diabetes & metabolism provider in Hinsdale, Illinois, licensed in Illinois (036.173453) and active in the NPI registry since July 2017. He is enrolled in Medicare PECOS, is affiliated with Adventist La Grange Memorial Hospital, and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Zakaria Sibai Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Zakaria Sibai reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hinsdale, IL 60521
- Reassigned Medicare billing, Illinois enrollment
- 381 clinicians in this Medicare group
Louisville, KY 40202
- Reassigned Medicare billing, Kentucky enrollment
- 2,337 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 8
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Adventist La Grange Memorial Hospital
Acute Care Hospitals · La Grange, ILAdventist Hinsdale Hospital
Acute Care Hospitals · Hinsdale, ILUchicago Medicine Adventhealth Glenoaks
Acute Care Hospitals · Glendale Heights, ILUchicago Medicine Adventhealth Bolingbrook
Acute Care Hospitals · Bolingbrook, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60521 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HINSDALE, IL 60521
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Zakaria Sibai's NPI number?
The NPI number for Zakaria Sibai is 1346763331. It was assigned to this individual provider in the NPPES registry on July 21, 2017.
Where is Zakaria Sibai located?
Zakaria Sibai practices at 911 N Elm St, Hinsdale, IL 60521. The listed phone number is (630) 861-6655.
What is Zakaria Sibai's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Zakaria Sibai enrolled in Medicare?
Yes. Zakaria Sibai is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Zakaria Sibai's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zakaria Sibai reassigns Medicare benefits to 2 organizations: Adventist Health Partners, Inc (Hinsdale, IL) and University Of Louisville Physicians, Inc. (Louisville, KY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Zakaria Sibai's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Zakaria Sibai accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Zakaria Sibai as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Zakaria Sibai affiliated with any hospitals?
According to CMS data, Zakaria Sibai is affiliated with Adventist La Grange Memorial Hospital, Adventist Hinsdale Hospital, Uchicago Medicine Adventhealth Glenoaks and Uchicago Medicine Adventhealth Bolingbrook.
When was this NPI record last updated?
The NPPES record for Zakaria Sibai was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Zakaria Sibai, MD · NPI 1346763331
Endocrinology, Diabetes & Metabolism physician in Hinsdale, Illinois. Individual provider, active in the CMS NPPES registry since July 21, 2017.
## Identity
- **NPI:** 1346763331 (Entity type: Individual)
- **Enumerated:** July 21, 2017
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 036.173453 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 911 N ELM ST, Hinsdale, IL 60521-3634
- **Phone:** (630) 861-6655
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Adventist Health Partners, Inc (NPI 1386075893, Hinsdale, IL); University Of Louisville Physicians, Inc. (NPI 1376818492, Louisville, KY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** September 2, 2026
- **Other identifiers:** Medicaid 7100680390 (KY)
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Source: [NPI Profile](https://npiprofile.com/npi/1346763331) · Data from the CMS NPPES public registry.