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

David Michael Leander, MD

Individual provider Internal Medicine Physician · NPI 1083230593

David Michael Leander, MD practises Internal Medicine in Saint Louis, Missouri. Graduated from Geisel School of Medicine at Dartmouth in 2020, 6 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
6
Trained at
Geisel School of Medicine at Dartmouth
Licensed in
MO
In the registry since
2020
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 Barnes Jew Hosp Plz
Saint Louis, MO 63110-1003
Phone: (314) 362-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 75 Francis St, Boston, MA 02115-6110 — (617) 732-5500
  • 1153 Centre St, Jamaica Plain, MA 02130-3446 — (617) 983-7000

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2020017608 (MO)

Record details

NPI number1083230593
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 20, 2020
Last updated in NPPESDecember 30, 2025
Certification dateDecember 30, 2025

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolGEISEL SCHOOL OF MEDICINE AT DARTMOUTH
Graduated 2020 (6 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients213
Services billed 592 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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 Massachusetts General Physicians Organization Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3484 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis