ESMAEL MAYAR MD
NPI 1215497326
Emergency Medicine in Oak Lawn, IL
About Esmael Mayar Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ESMAEL MAYAR MD (NPI 1215497326) is an individual emergency medicine provider in Oak Lawn, Illinois, licensed in Illinois (036.157417) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Loyola University Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Esmael Mayar 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
15Medicare enrollment records show Esmael Mayar reassigns Medicare billing to 15 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oak Lawn, IL 60453
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Advocate Health And Hospitals Corporation
- 4,870 clinicians in this Medicare group
Maywood, IL 60153
- Reassigned Medicare billing, Illinois enrollment
- 1,138 clinicians in this Medicare group
East Chicago, IN 46312
- Reassigned Medicare billing, Indiana enrollment
- 598 clinicians in this Medicare group
Darlington, WI 53530
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1114987054 (Wisconsin)
- 53 clinicians in this Medicare group
Amory, MS 38821
- Reassigned Medicare billing, Mississippi enrollment
- 107 clinicians in this Medicare group
West Point, MS 39773
- Reassigned Medicare billing, Mississippi enrollment
- 103 clinicians in this Medicare group
Starkville, MS 39759
- Reassigned Medicare billing, Mississippi enrollment
- 49 clinicians in this Medicare group
Hazlehurst, MS 39083
- Reassigned Medicare billing, Mississippi enrollment
- 159 clinicians in this Medicare group
Hattiesburg, MS 39401
- Reassigned Medicare billing, Mississippi enrollment
- 110 clinicians in this Medicare group
Ferriday, LA 71334
- Reassigned Medicare billing, Louisiana enrollment
- 37 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Loyola University Medical Center
Acute Care Hospitals · Maywood, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60453 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OAK LAWN, IL 60453
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 Esmael Mayar's NPI number?
The NPI number for Esmael Mayar is 1215497326. It was assigned to this individual provider in the NPPES registry on March 23, 2019.
Where is Esmael Mayar located?
Esmael Mayar practices at 4440 W 95th St, Oak Lawn, IL 60453. The listed phone number is (708) 684-5354.
What is Esmael Mayar's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Esmael Mayar enrolled in Medicare?
Yes. Esmael Mayar 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 Esmael Mayar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Esmael Mayar reassigns Medicare benefits to 15 organizations: Advocate Health & Hospitals Corporation (Oak Lawn, IL), Loyola University Medical Center (Maywood, IL), Cep America LLC (East Chicago, IN), Lafayette County (Darlington, WI), Relias Emergency Medicine Specialists Of Amory, LLC (Amory, MS) and 10 more organizations, 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 Esmael Mayar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Esmael Mayar accept?
Health plans from Blue Cross Blue Shield of North Dakota, Blue Cross and Blue Shield of Alabama, HMO Louisiana, Oscar Health and Sanford Health Plan list Esmael Mayar 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 Esmael Mayar affiliated with any hospitals?
According to CMS data, Esmael Mayar is affiliated with Loyola University Medical Center.
When was this NPI record last updated?
The NPPES record for Esmael Mayar was last updated on June 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Esmael Mayar, MD · NPI 1215497326
Emergency Medicine physician in Oak Lawn, Illinois. Individual provider, active in the CMS NPPES registry since March 23, 2019.
## Identity
- **NPI:** 1215497326 (Entity type: Individual)
- **Enumerated:** March 23, 2019
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 036.157417 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4440 W 95TH ST, Oak Lawn, IL 60453-2600
- **Phone:** (708) 684-5354
## 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:** 15 organizations under Medicare reassignment (form CMS-855R): Advocate Health & Hospitals Corporation (NPI 1912936014, Oak Lawn, IL); Loyola University Medical Center (NPI 1336159961, Maywood, IL); Cep America LLC (NPI 1336805563, East Chicago, IN); Lafayette County (NPI 1740273358, Darlington, WI); Relias Emergency Medicine Specialists Of Amory, LLC (NPI 1265074769, Amory, MS); and 10 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Carolina School Of Medicine, Greenville, class of 2019
## Record status
- **NPPES last updated:** June 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1215497326) · Data from the CMS NPPES public registry.