MAZHAR HUSSAIN ZAIDI MD
NPI 1093729501
Family Medicine in Mchenry, IL
About Mazhar Hussain Zaidi Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MAZHAR HUSSAIN ZAIDI MD (NPI 1093729501) is an individual family medicine provider in Mchenry, Illinois, licensed in Illinois (036123960) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and maintains a secondary practice location in Long Grove.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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
Mazhar Hussain Zaidi 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
4Medicare enrollment records show Mazhar Zaidi reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Barrington, IL 60011
- Reassigned Medicare billing, Illinois enrollment
- 155 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 clinicians in this Medicare group
Bartlett, IL 60103
- Reassigned Medicare billing, Illinois enrollment
- 4 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 1,664 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Illinois Masonic Medical Center
Acute Care Hospitals · Chicago, ILAdvocate Condell Medical Center
Acute Care Hospitals · Libertyville, ILAdvocate Good Shepherd Hospital
Acute Care Hospitals · Barrington, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60051 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Mazhar Zaidi's NPI number?
The NPI number for Mazhar Zaidi is 1093729501. It was assigned to this individual provider in the NPPES registry on July 28, 2006.
Where is Mazhar Zaidi located?
Mazhar Zaidi practices at 2507 N Richmond Rd, Mchenry, IL 60051. The listed phone number is (815) 338-6600.
What is Mazhar Zaidi's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mazhar Zaidi enrolled in Medicare?
Yes. Mazhar Zaidi 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 Mazhar Zaidi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mazhar Zaidi reassigns Medicare benefits to 4 organizations: Best Practices Inpatient Care, Ltd. (Barrington, IL), Northwestern Medical Faculty Foundation (Carol Stream, IL), Shabiha Zaidi M.D.S.C. (Bartlett, IL) and Central Dupage Physician Group (Carol Stream, IL). 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 Mazhar Zaidi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mazhar Zaidi affiliated with any hospitals?
According to CMS data, Mazhar Zaidi is affiliated with Advocate Illinois Masonic Medical Center, Advocate Condell Medical Center and Advocate Good Shepherd Hospital.
When was this NPI record last updated?
The NPPES record for Mazhar Zaidi was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.