HAZEM NASSAR M.D.
NPI 1740412246
Internal Medicine in Chicago, IL
About Hazem Nassar M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HAZEM NASSAR M.D. (NPI 1740412246) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125056257) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS, is affiliated with Grant Medical Center, and is a graduate of Other (2003).
NPPES Registry Identity
Specialties & Licenses
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
Hazem Nassar M.d. 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 Hazem Nassar reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Novi, MI 48375
- Reassigned Medicare billing, Ohio enrollment
- 40 clinicians in this Medicare group
Columbus, OH 43214
- Reassigned Medicare billing, Ohio enrollment
- 3,314 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 4
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.
Grant Medical Center
Acute Care Hospitals · Columbus, OHOhio State University State Health System
Acute Care Hospitals · Columbus, OHOhiohealth Mansfield Hospital
Acute Care Hospitals · Mansfield, OHLicking Memorial Hospital
Acute Care Hospitals · Newark, OHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60640 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60640
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 Hazem Nassar's NPI number?
The NPI number for Hazem Nassar is 1740412246. It was assigned to this individual provider in the NPPES registry on August 17, 2009.
Where is Hazem Nassar located?
Hazem Nassar practices at 4600 N Clarendon Ave Apt 1109, Chicago, IL 60640. The listed phone number is (773) 293-7133.
What is Hazem Nassar's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Hazem Nassar enrolled in Medicare?
Yes. Hazem Nassar 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 Hazem Nassar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hazem Nassar reassigns Medicare benefits to 2 organizations: Complexcare Medical Group Midwest H PLLC (Novi, MI) and Ohiohealth Corporation (Columbus, OH). 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 Hazem Nassar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Hazem Nassar accept?
Health plans from Anthem Blue Cross and Blue Shield, CareSource, MedMutual and Molina Healthcare list Hazem Nassar 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 Hazem Nassar affiliated with any hospitals?
According to CMS data, Hazem Nassar is affiliated with Grant Medical Center, Ohio State University State Health System, Ohiohealth Mansfield Hospital and Licking Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Hazem Nassar was last updated on January 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# Hazem Nassar, M.D. · NPI 1740412246
Internal Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since August 17, 2009.
## Identity
- **NPI:** 1740412246 (Entity type: Individual)
- **Enumerated:** August 17, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 125056257 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4600 N CLARENDON AVE, APT 1109, Chicago, IL 60640-5710
- **Phone:** (773) 293-7133
## 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): Complexcare Medical Group Midwest H PLLC (NPI 1457144933, Novi, MI); Ohiohealth Corporation (NPI 1194979526, Columbus, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** January 25, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1740412246) · Data from the CMS NPPES public registry.