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

Dr. Robert David Siegel, MD

Individual provider Internal Medicine Physician · NPI 1518901545

Dr. Robert David Siegel, MD is a Medical Oncology in Alton, Illinois. Graduated from Columbia University College of Physicians and Surgeons in 1981, 45 years ago. Practices with Washington University Physicians in Illinois Inc, a 167-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
45
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
MO
In the registry since
2006
Specialties on file
2
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

1 Memorial Dr Div Medical Oncology
Alton, IL 62002-6722
Phone: (800) 647-2098
Fax: (314) 362-3192
Show map & directions

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

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 2022039164 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2022039164 (MO)

Record details

NPI number1518901545
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 16, 2006
Last updated in NPPESApril 21, 2025
Certification dateSeptember 19, 2024

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1981 (45 years in practice)
Group practice Washington University Physicians In Illinois Inc — 167 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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