Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

AMERICAN MULTISPECIALTY GROUP INC.
NPI 1972559532
Internal Medicine in Saint Louis, MO

Q: 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.

Q: What is American Multispecialty Group Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since May 25, 2006CLIA 26D2138672 · Waiver

555 MARYVILLE UNIVERSITY DR STE 240, SAINT LOUIS, MO 63141(314) 851-1000(314) 851-4445 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Sep 29, 2026, Sep 20, 2025, Aug 8, 2025 and 2 more (5 updates tracked since 2021).

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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

NPI1972559532

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameAMERICAN MULTISPECIALTY GROUP INC.

Location Address555 MARYVILLE UNIVERSITY DR STE 240Saint Louis, MO 63141-5822

Mailing AddressPo Box 419052Saint Louis, MO 63141-9052 · (314) 851-1000

Phone(314) 851-1000

Fax(314) 851-4445

Organization SubpartNo

Authorized OfficialDavid KearneyCeo · (314) 851-1000

Enumeration DateMay 25, 2006

Last NPPES UpdateSeptember 29, 20265 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1972559532 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 14

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedDietitian, RegisteredTaxonomy 133V00000X

Also ListedAllergy & ImmunologyTaxonomy 207K00000X

Also ListedFamily MedicineTaxonomy 207Q00000X

Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X

Also ListedPathology · Anatomic Pathology & Clinical PathologyTaxonomy 207ZP0102X

Also ListedPediatricsTaxonomy 208000000X

Also ListedPsychiatry & Neurology · Child & Adolescent PsychiatryTaxonomy 2084P0804X

Also ListedUrologyTaxonomy 208800000X

Also ListedPhysician AssistantTaxonomy 363A00000X

Also ListedNurse PractitionerTaxonomy 363L00000X

Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X

Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X

Also ListedNurse Practitioner · PediatricsTaxonomy 363LP0200X

555 MARYVILLE UNIVERSITY DR STE 240, Saint Louis, MO 63141

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Other Names 1

Doing Business AsEsse Health

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

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, MO

Active · expires Oct 22, 2027

CLIA Number26D2138672

Laboratory TypePhysician Office

Certificate Effective DateOctober 23, 2025

Certificate Expiration DateOctober 22, 2027

Laboratory DirectorKathryn Henderson

Laboratory Phone(314) 843-7333

Laboratory LocationAmerican Multispecialty Group Inc Dba E3sse Health - Loc 745034 Griffin Road, Saint Louis, MO 63128

CLIA data matches this NPI record on: Name

This certificate is issued to a laboratory to perform only waived tests.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MICHELLE GOETZ D.O.

Internal Medicine (Hospice and Palliative Medicine)

555 MARYVILLE UNIVERSITY DR STE 240
SAINT LOUIS, MO 63141

St. Louis County (314) 373-2675

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 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.

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 Home State Health and Ambetter from Sunflower Health Plan 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 14 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.