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

Thomas B Tan, MD

Individual provider Hematology & Oncology Physician · NPI 1275528382

Thomas B Tan, MD is a Medical Oncology in Lake St Louis, Missouri. Qualified in 1986, 40 years ago. Practices with SSM Medical Group Inc, a 560-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Alabama, Florida, Missouri and Oregon and 1 more.

Years since qualifying
40
Licensed in
AL, FL, MO, OR, TX
In the registry since
2005
Specialties on file
5
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

400 Medical Plz Ste 100
Lake St Louis, MO 63367-1493
Phone: (636) 639-8600
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 2610 Uhrmann Rd, Klamath Falls, OR 97601-1123 — (541) 274-4171
  • Rapid City Regional Hospital, Rapid City, SD 57701 — (850) 232-1165
  • 2717 Michaelangelo Dr Ste 200, Edinburg, TX 78539-1412 — (956) 362-2250

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 2020008924 (MO)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 17614 (AL)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 62467 (FL)
Medical Oncology Physician Taxonomy 207RX0202X · Licence MD221267 (OR)
Medical Oncology Physician Taxonomy 207RX0202X · Licence H2823 (TX)

Record details

NPI number1275528382
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 14, 2005
Last updated in NPPESMarch 3, 2025
Certification dateMarch 3, 2025

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Group practice Ssm Medical Group Inc — 560 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Lake St Louis