DR. LESLIE S ZUN MD
NPI 1376543421
Emergency Medicine in Glenview, IL
About Dr. Leslie S Zun Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LESLIE S ZUN MD (NPI 1376543421) is an individual emergency medicine provider in Glenview, Illinois, licensed in Illinois (036066812) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Northwestern Lake Forest Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
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. Leslie S Zun 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
6Medicare enrollment records show Leslie Zun reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Des Plaines, IL 60016
- Reassigned Medicare billing, Illinois enrollment
- 646 clinicians in this Medicare group
Highland Park, IL 60035
- Reassigned Medicare billing, Illinois enrollment
- 151 clinicians in this Medicare group
Chicago, IL 60631
- Reassigned Medicare billing, Illinois enrollment
- 982 clinicians in this Medicare group
Bensenville, IL 60106
- Reassigned Medicare billing, Illinois enrollment
- 20 clinicians in this Medicare group
Chicago, IL 60625
- Reassigned Medicare billing, Illinois enrollment
- 350 clinicians in this Medicare group
Carol Stream, IL 60122
- Reassigned Medicare billing, Illinois enrollment
- 4,817 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northwestern Lake Forest Hospital
Acute Care Hospitals · Lake Forest, ILNorthwestern Memorial Hospital
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60026 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
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 Leslie Zun's NPI number?
The NPI number for Leslie Zun is 1376543421. It was assigned to this individual provider in the NPPES registry on July 29, 2005.
Where is Leslie Zun located?
Leslie Zun practices at 2701 Patriot Blvd Ste 110, Glenview, IL 60026. The listed phone number is (847) 475-2273.
What is Leslie Zun's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Leslie Zun enrolled in Medicare?
Yes. Leslie Zun 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 Leslie Zun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Zun reassigns Medicare benefits to 6 organizations: Mount Sinai Community Foundation (Des Plaines, IL), County Of Lake (Highland Park, IL), Cepamerica Illinois LLP (Chicago, IL), Hamdard Health Alliance (Bensenville, IL), Swedish Covenant Management Services, Inc (Chicago, IL) and 1 more organization, listed in the Medicare section above. 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 Leslie Zun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Leslie Zun accept?
Health plans from Wellmark Health Plan of Iowa, Inc. list Leslie Zun 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 Leslie Zun affiliated with any hospitals?
According to CMS data, Leslie Zun is affiliated with Northwestern Lake Forest Hospital and Northwestern Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Leslie Zun was last updated on November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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. Leslie S Zun, MD · NPI 1376543421
Emergency Medicine physician in Glenview, Illinois. Individual provider, active in the CMS NPPES registry since July 29, 2005.
## Identity
- **NPI:** 1376543421 (Entity type: Individual)
- **Enumerated:** July 29, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 036066812 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 2701 PATRIOT BLVD STE 110, Glenview, IL 60026-8039
- **Phone:** (847) 475-2273 · **Fax:** (847) 998-9005
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Mount Sinai Community Foundation (NPI 1134164841, Des Plaines, IL); County Of Lake (NPI 1285663328, Highland Park, IL); Cepamerica Illinois LLP (NPI 1518415751, Chicago, IL); Hamdard Health Alliance (NPI 1700470580, Bensenville, IL); Swedish Covenant Management Services, Inc (NPI 1962049551, Chicago, IL); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 1982
## Record status
- **NPPES last updated:** November 3, 2025
- **Other identifiers:** Medicaid 036-066812-7 (IL)
---
Source: [NPI Profile](https://npiprofile.com/npi/1376543421) · Data from the CMS NPPES public registry.