MARK S. GROSS M.D.
NPI 1568458776
Orthopaedic Surgery in Barrington, IL
About Mark S. Gross M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK S. GROSS M.D. (NPI 1568458776) is an individual orthopaedic surgery provider in Barrington, Illinois, licensed in Illinois (036062557) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Mark S. Gross M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mark Gross reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bannockburn, IL 60015
- Reassigned Medicare billing, Illinois enrollment
- 538 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60010 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.
Reported Quality Measures
Other Providers at the Same Location NPPES 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BARRINGTON, IL 60010
BARRINGTON, IL 60010
BARRINGTON, IL 60010
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 Mark Gross's NPI number?
The NPI number for Mark Gross is 1568458776. It was assigned to this individual provider in the NPPES registry on September 22, 2005.
Where is Mark Gross located?
Mark Gross practices at 27401 W Highway 22 Ste 125, Barrington, IL 60010. The listed phone number is (847) 381-0388.
What is Mark Gross's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Mark Gross enrolled in Medicare?
Yes. Mark Gross is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mark Gross's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Gross reassigns Medicare benefits to Illinois Bone And Joint Institute LLC (Bannockburn, 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 Mark Gross'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 Mark Gross was last updated on March 29, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.