WILLIAM WALLEN MD
NPI 1164827945
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Indianapolis, IN
About William Wallen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM WALLEN MD (NPI 1164827945) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Indianapolis, Indiana, licensed in Kentucky (TP576) and active in the NPI registry since October 2014. He is enrolled in Medicare PECOS, maintains a secondary practice location in Lexington, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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
William Wallen 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
4Medicare enrollment records show William Wallen reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Indianapolis, IN 46260
- Reassigned Medicare billing, Indiana enrollment
- 294 clinicians in this Medicare group
Cincinnati, OH 45229
- Reassigned Medicare billing, Ohio enrollment
- 2,080 clinicians in this Medicare group
Lexington, KY 40504
- Reassigned Medicare billing, Kentucky enrollment
- 1,761 clinicians in this Medicare group
Lexington, KY 40517
- Reassigned Medicare billing, Kentucky enrollment
- 1,502 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 46260 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
INDIANAPOLIS, IN 46260
INDIANAPOLIS, IN 46260
INDIANAPOLIS, IN 46260
INDIANAPOLIS, IN 46260
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 Wallen's NPI number?
The NPI number for William Wallen is 1164827945. It was assigned to this individual provider in the NPPES registry on October 23, 2014.
Where is William Wallen located?
William Wallen practices at 8333 Naab Rd Ste 320, Indianapolis, IN 46260. The listed phone number is (317) 338-3000.
What is William Wallen's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is William Wallen enrolled in Medicare?
Yes. William Wallen 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 Wallen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Wallen reassigns Medicare benefits to 4 organizations: St Vincent Pediatric Subspecialties (Indianapolis, IN), Children's Hospital Medical Center (Cincinnati, OH), University Of Kentucky (Lexington, KY) and Kentucky Medical Services Foundation, Inc (Lexington, KY). 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 Wallen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Wallen 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 Wallen 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 William Wallen was last updated on September 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months 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.
# William Wallen, MD · NPI 1164827945
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Indianapolis, Indiana. Individual provider, active in the CMS NPPES registry since October 23, 2014.
## Identity
- **NPI:** 1164827945 (Entity type: Individual)
- **Enumerated:** October 23, 2014
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** TP576 (Kentucky)
- **Sole proprietor:** No
## Practice location
- **Address:** 8333 NAAB RD STE 320, Indianapolis, IN 46260-1983
- **Phone:** (317) 338-3000 · **Fax:** (317) 583-3099
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): St Vincent Pediatric Subspecialties (NPI 1013967736, Indianapolis, IN); Children's Hospital Medical Center (NPI 1609915784, Cincinnati, OH); University Of Kentucky (NPI 1194852582, Lexington, KY); Kentucky Medical Services Foundation, Inc (NPI 1326091448, Lexington, KY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** September 9, 2025
- **Other identifiers:** Other TP576 (KY)
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Source: [NPI Profile](https://npiprofile.com/npi/1164827945) · Data from the CMS NPPES public registry.