ROBERT L GAY III M.D.
NPI 1427057298
Anesthesiology in Chicago, IL
About Robert L Gay Iii M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT L GAY III M.D. (NPI 1427057298) is an individual anesthesiology provider in Chicago, Illinois, licensed in Illinois (036085978) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (1990).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Robert L Gay Iii M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Robert Gay reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mokena, IL 60448
- Reassigned Medicare billing, Illinois enrollment
- 208 clinicians in this Medicare group
Laguna Hills, CA 92653
- Reassigned Medicare billing, California enrollment
- 833 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 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.
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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60611
CHICAGO, IL 60611
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 Robert Gay's NPI number?
The NPI number for Robert Gay is 1427057298. It was assigned to this individual provider in the NPPES registry on July 14, 2005.
Where is Robert Gay located?
Robert Gay practices at 1 E Erie St Suite 300, Chicago, IL 60611. The listed phone number is (312) 649-3939.
What is Robert Gay's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Robert Gay enrolled in Medicare?
Yes. Robert Gay is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Robert Gay's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Gay reassigns Medicare benefits to 3 organizations: American Anesthesiology Associates Of Illinois, S.C. (Mokena, IL), Cep America - Anesthesia PC (Laguna Hills, CA) and John Muir Trauma Physicians Billing Service (Walnut Creek, CA). 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 Robert Gay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Robert Gay was last updated on April 12, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.