MERCY CLINIC ST. LOUIS CANCER AND BREAST INSTITUTE, LLC
NPI 1891946349
Surgery - Surgical Oncology in Saint Louis, MO
About Mercy Clinic St. Louis Cancer And Breast Institute, Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MERCY CLINIC ST. LOUIS CANCER AND BREAST INSTITUTE, LLC (NPI 1891946349), doing business as St Louis Cancer And Breast Institute, is a healthcare organization registered as a surgical oncology in Saint Louis, Missouri and active in the NPI registry since October 2008. The organization maintains a secondary practice location in Ballwin and lists Kerry Dunger, Executive Director - Finance, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 4
Other Names 1
Secondary Practice Location 1
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mercy Clinic St. Louis Cancer And Breast Institute, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
10Medicare enrollment records show 10 clinicians reassign Medicare billing to Mercy Clinic St. Louis Cancer And Breast Institute, LLC, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 6 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 2
Clinicians, nearest first (10)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Mercy Clinic St. Louis Cancer And Breast Institute, LLC's NPI number?
The NPI number for Mercy Clinic St. Louis Cancer And Breast Institute, LLC is 1891946349. It was assigned to this organization in the NPPES registry on October 2, 2008. The provider was formerly known as St Louis Cancer And Breast Institute.
Where is Mercy Clinic St. Louis Cancer And Breast Institute, LLC located?
Mercy Clinic St. Louis Cancer And Breast Institute, LLC is located at 621 S New Ballas Rd Ste 260A, Saint Louis, MO 63141. The listed phone number is (314) 251-8001.
What is Mercy Clinic St. Louis Cancer And Breast Institute, LLC's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.
Is Mercy Clinic St. Louis Cancer And Breast Institute, LLC enrolled in Medicare?
Yes. Mercy Clinic St. Louis Cancer And Breast Institute, LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mercy Clinic St. Louis Cancer And Breast Institute, LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 10 clinicians in 2 Medicare specialties reassign their Medicare billing to Mercy Clinic St. Louis Cancer And Breast Institute, LLC. A 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 the clinician's services. The largest specialties are General Surgery (7) and Nurse Practitioner (3). Of these, 1 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Mercy Clinic St. Louis Cancer And Breast Institute, LLC accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 2 other insurers list Mercy Clinic St. Louis Cancer And Breast Institute, LLC 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 Mercy Clinic St. Louis Cancer And Breast Institute, LLC was last updated on April 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Mercy Clinic St. Louis Cancer And Breast Institute, Llc · NPI 1891946349
Surgical Oncology organization in Saint Louis, Missouri. Organization record, active in the CMS NPPES registry since October 2, 2008.
## Identity
- **NPI:** 1891946349 (Entity type: Organization)
- **Enumerated:** October 2, 2008
- **Primary specialty:** Surgery - Surgical Oncology · taxonomy 2086X0206X
- **Also known as:** ST LOUIS CANCER AND BREAST INSTITUTE (Former Legal Business Name)
- **Organization subpart:** Yes (part of Mercy Clinic East Communities)
- **Authorized official:** Kerry Dunger, EXECUTIVE DIRECTOR - FINANCE
## Practice location
- **Address:** 621 S NEW BALLAS RD STE 260A, Saint Louis, MO 63141-8256
- **Phone:** (314) 251-8001 · **Fax:** (314) 256-5043
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 10 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: General Surgery (7), Nurse Practitioner (3); 1 practice at this address and 6 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 25, 2025
- **Other identifiers:** Medicaid 504721903 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1891946349) · Data from the CMS NPPES public registry.