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Thomas B Tan, MD

Hematology & Oncology Physician in Lake St Louis, MO · enumerated 2005.

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

National Provider Identifier

1275528382

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Registry record

Entity type Individual (Type 1)
Name Thomas B Tan
Credential MD
Sex Male
Practice address 400 Medical Plz Ste 100, Lake St Louis, MO, 63367
Phone (636) 639-8600
Enumeration date Sep 14, 2005
Last updated in NPPES Mar 3, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 17614 (AL) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 62467 (FL) Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License MD221267 (OR) Secondary
207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License H2823 (TX) Secondary
207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 2020008924 (MO) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
371163300 Medicaid FL -
109896 Other AL AL MEDICAID- FOLEY
110883 Other AL AL MEDICAID- N DAVIS
110905 Other AL AL MEDICAID- WEST FLORIDA OFFICE

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

How do I verify Thomas Tan's NPI record?
Cross-check NPI 1275528382 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1275528382 active?
Yes, as of the latest NPPES snapshot, NPI 1275528382 is active (record last updated 2025-03-03).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-03.