KAREN RIEGER MD
NPI 1598870982
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Indianapolis, IN
About Karen Rieger Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN RIEGER MD (NPI 1598870982) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Indianapolis, Indiana, licensed in Indiana (01047804) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Eskenazi Health, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Karen Rieger 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 Karen Rieger 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
- 5,212 clinicians in this Medicare group
Indianapolis, IN 46202
- Reassigned Medicare billing, Indiana enrollment
- 93 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Eskenazi Health
Acute Care Hospitals · Indianapolis, INIndiana University Health
Acute Care Hospitals · Indianapolis, 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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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
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 Karen Rieger's NPI number?
The NPI number for Karen Rieger is 1598870982. It was assigned to this individual provider in the NPPES registry on August 19, 2006.
Where is Karen Rieger located?
Karen Rieger practices at 535 Barnhill Dr, Indianapolis, IN 46202. The listed phone number is (317) 944-2394.
What is Karen Rieger's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Karen Rieger enrolled in Medicare?
Yes. Karen Rieger 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 Karen Rieger's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Rieger reassigns Medicare benefits to 2 organizations: Iu Health Medical Group, LLC (Indianapolis, IN) and Cardiothoracic Surgeons Inc. (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 Karen Rieger's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Karen Rieger 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 Karen Rieger 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 Karen Rieger affiliated with any hospitals?
According to CMS data, Karen Rieger is affiliated with Eskenazi Health and Indiana University Health.
When was this NPI record last updated?
The NPPES record for Karen Rieger was last updated on December 29, 2020. 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.
# Karen Rieger, MD · NPI 1598870982
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since August 19, 2006.
## Identity
- **NPI:** 1598870982 (Entity type: Individual)
- **Enumerated:** August 19, 2006
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 01047804 (Indiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 535 BARNHILL DR, Indianapolis, IN 46202-5116
- **Phone:** (317) 944-2394 · **Fax:** (317) 274-2940
## 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): Iu Health Medical Group, LLC (NPI 1326893777, Indianapolis, IN); Cardiothoracic Surgeons Inc. (NPI 1770796096, Indianapolis, IN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 1990
## Record status
- **NPPES last updated:** December 29, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1598870982) · Data from the CMS NPPES public registry.