AMERICAN MULTISPECIALTY GROUP INC.
NPI 1972559532
Internal Medicine in Saint Louis, MO
About American Multispecialty Group Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMERICAN MULTISPECIALTY GROUP INC. (NPI 1972559532), doing business as Esse Health, is a healthcare organization registered as an internal medicine in Saint Louis, Missouri and active in the NPI registry since May 2006. The organization holds a CLIA Waiver certificate valid through October 22, 2027 and lists David Kearney, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 14
Other Names 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)
American Multispecialty Group Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
119Medicare enrollment records show 119 clinicians reassign Medicare billing to American Multispecialty Group Inc., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 35 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 10
Nearest to this location (20)
See all 119Saint Louis, MO 63141
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 26D2138672
American Multispecialty Group Inc Dba E3sse Health - Loc 74 · Saint Louis, MOFrequently 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 American Multispecialty Group Inc.'s NPI number?
The NPI number for American Multispecialty Group Inc. is 1972559532. It was assigned to this organization in the NPPES registry on May 25, 2006. The provider is doing business as Esse Health.
Where is American Multispecialty Group Inc. located?
American Multispecialty Group Inc. is located at 555 Maryville University Dr Ste 240, Saint Louis, MO 63141. The listed phone number is (314) 851-1000.
What is American Multispecialty Group Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is American Multispecialty Group Inc. enrolled in Medicare?
Yes. American Multispecialty Group Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through American Multispecialty Group Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 119 clinicians in 10 Medicare specialties reassign their Medicare billing to American Multispecialty Group Inc.. 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 (39), Family Practice (35) and Internal Medicine (33). Of these, 1 practice at this address and 35 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does American Multispecialty Group Inc. hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 26D2138672) is associated with this NPI, valid through October 22, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does American Multispecialty Group Inc. 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 American Multispecialty Group Inc. 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 American Multispecialty Group Inc. was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days 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.
# American Multispecialty Group Inc. · NPI 1972559532
Internal Medicine organization in Saint Louis, Missouri. Organization record, active in the CMS NPPES registry since May 25, 2006.
## Identity
- **NPI:** 1972559532 (Entity type: Organization)
- **Enumerated:** May 25, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Also known as:** Esse Health (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** David Kearney, CEO
## Practice location
- **Address:** 555 MARYVILLE UNIVERSITY DR STE 240, Saint Louis, MO 63141-5822
- **Phone:** (314) 851-1000 · **Fax:** (314) 851-4445
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 119 clinicians in 10 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (39), Family Practice (35), Internal Medicine (33); 1 practice at this address and 35 within 10 miles; [full list](https://npiprofile.com/npi/1972559532/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2026
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1972559532) · Data from the CMS NPPES public registry.