THOMAS A. MAYER MD
NPI 1013937150
Internal Medicine - Interventional Cardiology in Bannockburn, IL
About Thomas A. Mayer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS A. MAYER MD (NPI 1013937150) is an individual interventional cardiology provider in Bannockburn, Illinois, licensed in Illinois (36069502) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains a secondary practice location in Bannockburn.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
Other Identifiers 5
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
Thomas A. Mayer 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 Reassignment
Medicare enrollment records show Thomas Mayer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Evanston, IL 60201
- Reassigned Medicare billing, Illinois enrollment
- 4,841 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 19
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northshore University Healthsystem - Evanston Hospital
Acute Care Hospitals · Evanston, ILSwedish Hospital
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60015 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 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BANNOCKBURN, IL 60015
BANNOCKBURN, IL 60015
BANNOCKBURN, IL 60015
BANNOCKBURN, IL 60015
BANNOCKBURN, IL 60015
BANNOCKBURN, IL 60015
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 Thomas Mayer's NPI number?
The NPI number for Thomas Mayer is 1013937150. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Thomas Mayer located?
Thomas Mayer practices at 2151 Waukegan Rd Ste 100, Bannockburn, IL 60015. The listed phone number is (847) 444-5300.
What is Thomas Mayer's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.
Is Thomas Mayer enrolled in Medicare?
Yes. Thomas Mayer 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 organization bills Medicare for Thomas Mayer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Mayer reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, IL). The 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 Thomas Mayer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Mayer accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Thomas Mayer 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 Thomas Mayer affiliated with any hospitals?
According to CMS data, Thomas Mayer is affiliated with Northshore University Healthsystem - Evanston Hospital and Swedish Hospital.
When was this NPI record last updated?
The NPPES record for Thomas Mayer was last updated on October 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.