KIEREN J MATHER M.D.
NPI 1528022340
Internal Medicine - Endocrinology, Diabetes & Metabolism in Indianapolis, IN
About Kieren J Mather M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KIEREN J MATHER M.D. (NPI 1528022340) is an individual endocrinology, diabetes & metabolism provider in Indianapolis, Indiana, licensed in Indiana (01051373A) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS.
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 (PECOS)
Kieren J Mather M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Kieren Mather 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
- 1,781 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 358 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 5,212 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 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
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 Kieren Mather's NPI number?
The NPI number for Kieren Mather is 1528022340. It was assigned to this individual provider in the NPPES registry on April 17, 2006.
Where is Kieren Mather located?
Kieren Mather practices at 975 W Walnut St Ib 424, Indianapolis, IN 46202. The listed phone number is (317) 944-8660.
What is Kieren Mather's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Kieren Mather enrolled in Medicare?
Yes. Kieren Mather is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Kieren Mather's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kieren Mather reassigns Medicare benefits to 3 organizations: Indiana University Health Care Associates, Inc (Indianapolis, IN), University Medical Diagnostic Associates, Inc. (Indianapolis, IN) and Iu Health Medical Group, 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 Kieren Mather's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kieren Mather accept?
Health plans from CareSource and Cigna Healthcare list Kieren Mather 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.
When was this NPI record last updated?
The NPPES record for Kieren Mather was last updated on March 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Kieren J Mather, M.D. · NPI 1528022340
Endocrinology, Diabetes & Metabolism physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since April 17, 2006.
## Identity
- **NPI:** 1528022340 (Entity type: Individual)
- **Enumerated:** April 17, 2006
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 01051373A (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 975 W WALNUT ST, IB 424, Indianapolis, IN 46202-5181
- **Phone:** (317) 944-8660
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): Indiana University Health Care Associates, Inc (NPI 1902032832, Indianapolis, IN); University Medical Diagnostic Associates, Inc. (NPI 1861441537, Indianapolis, IN); Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 30, 2020
- **Other identifiers:** Medicaid 200318510 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1528022340) · Data from the CMS NPPES public registry.