THOMAS J WILLIS MD
NPI 1487896866
Anesthesiology in Indianapolis, IN
About Thomas J Willis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS J WILLIS MD (NPI 1487896866) is an individual anesthesiology provider in Indianapolis, Indiana, licensed in Indiana (01081254A) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health, and maintains a secondary practice location in Corpus Christi.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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 J Willis 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
3Medicare enrollment records show Thomas Willis reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 1,781 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 259 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 4
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.
Indiana University Health
Acute Care Hospitals · Indianapolis, INOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
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 Willis's NPI number?
The NPI number for Thomas Willis is 1487896866. It was assigned to this individual provider in the NPPES registry on March 31, 2009.
Where is Thomas Willis located?
Thomas Willis practices at 1701 N Senate Blvd, Indianapolis, IN 46202. The listed phone number is (317) 577-4200.
What is Thomas Willis's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Thomas Willis enrolled in Medicare?
Yes. Thomas Willis 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 Willis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Willis reassigns Medicare benefits to 3 organizations: Iu Health Medical Group, LLC (Indianapolis, IN), Indiana University Health Care Associates, Inc. (Indianapolis, IN) and Iu Anesthesiology Associates, LLC (Indianapolis, IN). 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 Willis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thomas Willis accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource list Thomas Willis 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 Willis affiliated with any hospitals?
According to CMS data, Thomas Willis is affiliated with Indiana University Health.
When was this NPI record last updated?
The NPPES record for Thomas Willis was last updated on November 28, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 J Willis, MD · NPI 1487896866
Anesthesiology physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since March 31, 2009.
## Identity
- **NPI:** 1487896866 (Entity type: Individual)
- **Enumerated:** March 31, 2009
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 01081254A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1701 N SENATE BLVD, Indianapolis, IN 46202-1239
- **Phone:** (317) 577-4200
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN); Indiana University Health Care Associates, Inc. (NPI 1679949002, Indianapolis, IN); Iu Anesthesiology Associates, LLC (NPI 1285684407, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wayne State University School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** November 28, 2023
- **Other identifiers:** Other Q00202320 (IN); Medicaid 300020977 (IN); Other 264430C49 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1487896866) · Data from the CMS NPPES public registry.