Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark Lee Sundermeyer, MD

Individual provider Internal Medicine Physician · NPI 1386690337

Dr. Mark Lee Sundermeyer, MD practises Medical Oncology in Saint Louis, Missouri. Graduated from University of Missouri, Columbia School of Medicine in 2000, 26 years ago. Practices with Washington University, a 2,986-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
26
Trained at
University of Missouri, Columbia School of Medicine
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

4921 Parkview Pl Div Im Medical Oncology Ste 7A 7B 7C
Saint Louis, MO 63110-1032
Phone: (800) 647-2098
Fax: (314) 362-3192
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 2023036999 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2023036999 (MO)

Record details

NPI number1386690337
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 25, 2006
Last updated in NPPESApril 17, 2025
Certification dateJune 3, 2020

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MISSOURI, COLUMBIA SCHOOL OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice Washington University — 2986 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients330
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Washington University

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2986 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis