MATTHEW L HOROWITZ M.D.
NPI 1467484410
Internal Medicine - Gastroenterology in Homewood, IL
About Matthew L Horowitz M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW L HOROWITZ M.D. (NPI 1467484410) is an individual gastroenterology provider in Homewood, Illinois, licensed in Illinois (036073567) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Matthew L Horowitz M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Matthew Horowitz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Elgin, IL 60123
- Reassigned Medicare billing, Illinois enrollment
- 235 clinicians in this Medicare group
Libertyville, IL 60048
- Reassigned Medicare billing, Illinois enrollment
- 74 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 6
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60430 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HOMEWOOD, IL 60430
HOMEWOOD, IL 60430
HOMEWOOD, IL 60430
HOMEWOOD, IL 60430
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 Matthew Horowitz's NPI number?
The NPI number for Matthew Horowitz is 1467484410. It was assigned to this individual provider in the NPPES registry on July 7, 2006.
Where is Matthew Horowitz located?
Matthew Horowitz practices at 17901 Governors Hwy Suite 208, Homewood, IL 60430. The listed phone number is (708) 799-3305.
What is Matthew Horowitz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Matthew Horowitz enrolled in Medicare?
Yes. Matthew Horowitz is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Matthew Horowitz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Horowitz reassigns Medicare benefits to 2 organizations: Illinois Gastroenterology Group, LLC (Elgin, IL) and Gi Partners Of Illinois, PLLC (Libertyville, IL). 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 Matthew Horowitz'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 Matthew Horowitz was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.