THOMAS ARNDT MD
NPI 1487614210
Internal Medicine - Gastroenterology in Oak Lawn, IL
About Thomas Arndt Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS ARNDT MD (NPI 1487614210) is an individual gastroenterology provider in Oak Lawn, Illinois, licensed in Illinois (036063478) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Osf Little Company Of Mary Medical Center, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1980).
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 and accepts Medicare assignment
Thomas Arndt 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
2Medicare enrollment records show Thomas Arndt 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
Peoria, IL 61615
- Reassigned Medicare billing, Illinois enrollment
- 2,944 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 10
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.
Osf Little Company Of Mary Medical Center
Acute Care Hospitals · Evergreen Park, 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.
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 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Arndt's NPI number?
The NPI number for Thomas Arndt is 1487614210. It was assigned to this individual provider in the NPPES registry on March 24, 2006.
Where is Thomas Arndt located?
Thomas Arndt practices at 9921 Southwest Hwy, Oak Lawn, IL 60453. The listed phone number is (708) 425-8616.
What is Thomas Arndt's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Thomas Arndt enrolled in Medicare?
Yes. Thomas Arndt 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 Thomas Arndt's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Arndt reassigns Medicare benefits to 2 organizations: Illinois Gastroenterology Group, LLC (Elgin, IL) and Osf Multi-Specialty Group (Peoria, 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 Thomas Arndt's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Thomas Arndt affiliated with any hospitals?
According to CMS data, Thomas Arndt is affiliated with Osf Little Company Of Mary Medical Center.
When was this NPI record last updated?
The NPPES record for Thomas Arndt was last updated on December 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Thomas Arndt, MD · NPI 1487614210
Gastroenterology physician in Oak Lawn, Illinois. Individual provider, active in the CMS NPPES registry since March 24, 2006.
## Identity
- **NPI:** 1487614210 (Entity type: Individual)
- **Enumerated:** March 24, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 036063478 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 9921 SOUTHWEST HWY, Oak Lawn, IL 60453-3767
- **Phone:** (708) 425-8616 · **Fax:** (708) 425-9468
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Illinois Gastroenterology Group, LLC (NPI 1316277817, Elgin, IL); Osf Multi-Specialty Group (NPI 1154908929, Peoria, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 1980
## Record status
- **NPPES last updated:** December 29, 2021
- **Other identifiers:** Other IL1223002; Medicaid 036063478 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1487614210) · Data from the CMS NPPES public registry.