DR. WILLIAM R KESSLER MD
NPI 1114976685
Internal Medicine - Gastroenterology in Indianapolis, IN
About Dr. William R Kessler Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM R KESSLER MD (NPI 1114976685) is an individual gastroenterology provider in Indianapolis, Indiana, licensed in Indiana (010S3971A) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Witham Health Services, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Dr. William R Kessler 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 William Kessler reassigns Medicare billing to 2 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
- 358 clinicians in this Medicare group
Lebanon, IN 46052
- Reassigned Medicare billing, Indiana enrollment
- 144 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 12
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.
Witham Health Services
Acute Care Hospitals · Lebanon, INPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 46202 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
INDIANAPOLIS, IN 46202
INDIANAPOLIS, IN 46202
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 William Kessler's NPI number?
The NPI number for William Kessler is 1114976685. It was assigned to this individual provider in the NPPES registry on May 10, 2006.
Where is William Kessler located?
William Kessler practices at 550 University Blvd Ste 4100, Indianapolis, IN 46202. The listed phone number is (317) 944-3332.
What is William Kessler's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is William Kessler enrolled in Medicare?
Yes. William Kessler 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 William Kessler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Kessler reassigns Medicare benefits to 2 organizations: University Medical Diagnostic Associates, Inc. (Indianapolis, IN) and Witham Memorial Hospital (Lebanon, 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 William Kessler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Kessler accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Anthem Blue Cross and Blue Shield and CareSource and 2 other insurers list William Kessler 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 William Kessler affiliated with any hospitals?
According to CMS data, William Kessler is affiliated with Witham Health Services.
When was this NPI record last updated?
The NPPES record for William Kessler was last updated on January 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. William R Kessler, MD · NPI 1114976685
Gastroenterology physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since May 10, 2006.
## Identity
- **NPI:** 1114976685 (Entity type: Individual)
- **Enumerated:** May 10, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 010S3971A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 UNIVERSITY BLVD, STE 4100, Indianapolis, IN 46202-5149
- **Phone:** (317) 944-3332 · **Fax:** (317) 944-0975
## 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): University Medical Diagnostic Associates, Inc. (NPI 1861441537, Indianapolis, IN); Witham Memorial Hospital (NPI 1083750293, Lebanon, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** January 13, 2021
- **Other identifiers:** Medicaid 200S10830A (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1114976685) · Data from the CMS NPPES public registry.