MERCY CLINIC ADULT HOSPITALISTS - ST. LOUIS, LLC
NPI 1841235108
Internal Medicine in Saint Louis, MO
About Mercy Clinic Adult Hospitalists - St. Louis, Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MERCY CLINIC ADULT HOSPITALISTS - ST. LOUIS, LLC (NPI 1841235108), doing business as St. John's Mercy Hospitalist, is a healthcare organization registered as an internal medicine in Saint Louis, Missouri and active in the NPI registry since June 2006. The organization lists Kerry Dunger, Executive Director - Finance, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 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 Adult Hospitalists - St. Louis, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
324Medicare enrollment records show 324 clinicians reassign Medicare billing to Mercy Clinic Adult Hospitalists - St. Louis, LLC, which bills Medicare for the services they deliver. Of these, 84 practice at this address and 170 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 13
Nearest to this location (20)
See all 324Saint Louis, MO 63141
Saint Louis, MO 63141
Saint Louis, MO 63141
Saint Louis, MO 63141
Saint Louis, MO 63141
Saint Louis, MO 63141
Creve Coeur, MO 63141
Saint Louis, MO 63141
Saint Louis, MO 63141
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 Adult Hospitalists - St. Louis, LLC's NPI number?
The NPI number for Mercy Clinic Adult Hospitalists - St. Louis, LLC is 1841235108. It was assigned to this organization in the NPPES registry on June 19, 2006. The provider was formerly known as St. John's Mercy Hospitalist.
Where is Mercy Clinic Adult Hospitalists - St. Louis, LLC located?
Mercy Clinic Adult Hospitalists - St. Louis, LLC is located at 621 S New Ballas Rd Suite 3016-B, Saint Louis, MO 63141. The listed phone number is (314) 251-6339.
What is Mercy Clinic Adult Hospitalists - St. Louis, LLC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mercy Clinic Adult Hospitalists - St. Louis, LLC enrolled in Medicare?
Yes. Mercy Clinic Adult Hospitalists - St. Louis, LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mercy Clinic Adult Hospitalists - St. Louis, LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 324 clinicians in 13 Medicare specialties reassign their Medicare billing to Mercy Clinic Adult Hospitalists - St. Louis, 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 Internal Medicine (165), Nurse Practitioner (66) and Psychiatry (31). Of these, 84 practice at this address and 170 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Mercy Clinic Adult Hospitalists - St. Louis, 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 Adult Hospitalists - St. Louis, 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 Adult Hospitalists - St. Louis, LLC was last updated on April 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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 Adult Hospitalists - St. Louis, Llc · NPI 1841235108
Internal Medicine organization in Saint Louis, Missouri. Organization record, active in the CMS NPPES registry since June 19, 2006.
## Identity
- **NPI:** 1841235108 (Entity type: Organization)
- **Enumerated:** June 19, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Also known as:** St. John's Mercy Hospitalist (Former Legal Business Name)
- **Organization subpart:** Yes (part of Mercy Hospitals East Communities)
- **Authorized official:** Kerry Dunger, EXECUTIVE DIRECTOR - FINANCE
## Practice location
- **Address:** 621 S NEW BALLAS RD, SUITE 3016-B, Saint Louis, MO 63141-8232
- **Phone:** (314) 251-6339 · **Fax:** (314) 251-4564
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 324 clinicians in 13 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (165), Nurse Practitioner (66), Psychiatry (31); 84 practice at this address and 170 within 10 miles; [full list](https://npiprofile.com/npi/1841235108/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 28, 2025
- **Other identifiers:** Medicaid 505240002 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1841235108) · Data from the CMS NPPES public registry.