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Medical Oncology

Jennifer E. Diaz, MD

Sees patients in Saint Louis, MO · Missouri

Summary

Jennifer E. Diaz, MD (Medical Oncology) is enrolled with Medicare at 1 practice location in Saint Louis, MO. NPI 1073192118. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(314) 747‑3000 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Jennifer E. Diaz, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
Medical OncologyPrimary specialty
YesAccepts Medicare assignment
5Years since medical school (graduated 2021)
Icahn School Of Medicine At Mount SinaiMedical school
FemaleGender (as listed)
Washington UniversityGroup practice

Quick answers

Where does Jennifer E. Diaz see patients?
Medicare's clinician data lists 1 practice location in Saint Louis, MO. Call before your visit to confirm the address.
What is Jennifer E. Diaz's specialty?
Medicare lists Medical Oncology as the primary specialty, and also Internal Medicine.
Does Jennifer E. Diaz accept Medicare assignment?
Yes. Medicare's clinician data says Jennifer E. Diaz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Jennifer E. Diaz?
(314) 747-3000, as listed in official Medicare / NPI Registry data.
What is Jennifer E. Diaz's NPI number?
1073192118. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Jennifer E. Diaz is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Jennifer E. Diaz as a member of this group (CMS data updated 2026-10-02).

  • Washington University3,029 clinicians in the group

Specialties

Find other Medical Oncology doctors in Missouri →

Other oncologists in Saint Louis

Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.

All oncologists in Saint Louis →

Clinician information

CredentialMD
Medical schoolIcahn School Of Medicine At Mount Sinai
Graduation year2021
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1073192118
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians