SSM HEALTH CARE ST. LOUIS
NPI 1366400855
Emergency Medicine in Saint Louis, MO
About Ssm Health Care St. Louis NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SSM HEALTH CARE ST. LOUIS (NPI 1366400855), doing business as Ssm Health St. Mary's Hospital Physician Billing, is a healthcare organization registered as an emergency medicine in Saint Louis, Missouri and active in the NPI registry since May 2006. The organization maintains 3 additional practice locations and lists Karen Rewerts, Vp Finance, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 7
Other Names 1
Secondary Practice Locations 3
Other Identifiers 2
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)
Ssm Health Care St. Louis is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
745Medicare enrollment records show 745 clinicians reassign Medicare billing to Ssm Health Care St. Louis, which bills Medicare for the services they deliver. Of these, 14 practice at this address and 279 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 39
Nearest to this location (20)
See all 745Saint Louis, MO 63117
St. Louis, MO 63117
Saint Louis, MO 63117
Saint Louis, MO 63117
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 Ssm Health Care St. Louis's NPI number?
The NPI number for Ssm Health Care St. Louis is 1366400855. It was assigned to this organization in the NPPES registry on May 3, 2006. The provider is doing business as SSM Health St. Mary's Hospital Physician Billing.
Where is Ssm Health Care St. Louis located?
Ssm Health Care St. Louis is located at 6420 Clayton Rd, Saint Louis, MO 63117. The listed phone number is (314) 768-8000.
What is Ssm Health Care St. Louis's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Ssm Health Care St. Louis enrolled in Medicare?
Yes. Ssm Health Care St. Louis is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ssm Health Care St. Louis?
According to the CMS Revalidation Reassignment List (October 2026 release), 745 clinicians in 39 Medicare specialties reassign their Medicare billing to Ssm Health Care St. Louis. 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 Nurse Practitioner (216), Pediatric Medicine (109) and Obstetrics/Gynecology (78). Of these, 14 practice at this address and 279 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
What insurance does Ssm Health Care St. Louis 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 3 other insurers list Ssm Health Care St. Louis 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 Ssm Health Care St. Louis was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Ssm Health Care St. Louis · NPI 1366400855
Emergency Medicine organization in Saint Louis, Missouri. Organization record, active in the CMS NPPES registry since May 3, 2006.
## Identity
- **NPI:** 1366400855 (Entity type: Organization)
- **Enumerated:** May 3, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **Also known as:** SSM Health St. Mary's Hospital Physician Billing (Doing Business As)
- **Organization subpart:** Yes (part of Ssm Healthcare St. Louis)
- **Authorized official:** Karen Rewerts, VP FINANCE
## Practice location
- **Address:** 6420 CLAYTON RD, Saint Louis, MO 63117-1811
- **Phone:** (314) 768-8000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 745 clinicians in 39 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (216), Pediatric Medicine (109), Obstetrics/Gynecology (78); 14 practice at this address and 279 within 10 miles; [full list](https://npiprofile.com/npi/1366400855/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 2, 2026
- **Other identifiers:** Medicaid 540326204 (MO); Other 3285 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1366400855) · Data from the CMS NPPES public registry.