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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Lawrence Stephen Tierney, M.D.

Gastroenterology Physician in Saint Charles, MO · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053440222

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Registry record

Entity type Individual (Type 1)
Name Lawrence Stephen Tierney
Credential M.D.
Sex Male
Practice address Saint Charles, MO, 63301
Phone (636) 669-2332
Enumeration date Mar 5, 2007
Last updated in NPPES Nov 24, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License R8J21 (MO) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Lawrence Tierney?
The National Provider Identifier (NPI) for Lawrence Tierney is 1053440222, a Type 1 (individual) record in the CMS NPPES registry.
Where does Lawrence Tierney practice?
The practice location on file with NPPES is in Saint Charles, MO. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-24.