Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Thomas B. Cahill Jr., MD

Individual provider Cardiovascular Disease Physician · NPI 1023128113

Thomas B. Cahill Jr., MD is a Cardiovascular Disease (Cardiology) in O Fallon, Illinois. Graduated from Saint Louis University School of Medicine in 1978, 48 years ago. Practices with St Elizabeths Hospital of the Hospital Sisters of the Third Order, a 29-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
48
Trained at
Saint Louis University School of Medicine
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

Three Saint Elizabeth Blvd Ste 2800
O Fallon, IL 62269-1282
Phone: (618) 233-6044
Fax: (833) 973-4218
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 036-060357 (IL)

Record details

NPI number1023128113
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESDecember 21, 2021
Certification dateDecember 21, 2021
Mailing addressThree Saint Elizabeth Blvd Ste 2800, O Fallon, IL 62269-1282

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Also practisesINTERNAL MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1978 (48 years in practice)
Group practice St Elizabeths Hospital Of The Hospital Sisters Of The Third Order — 29 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in O Fallon