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Medical Oncology

Geoffrey L. Uy, MD

Works at hospitals in Saint Louis, MO · Saint Peters, MO · Missouri

Summary

Dr. Geoffrey L. Uy, MD is an oncologist at 1 Barnes Jew Hosp Plz, Saint Louis, MO 63110. Phone: (314) 747-3000. Accepts Medicare assignment. In 2024, Geoffrey L. Uy had 262 Original Medicare patients and 38,195 services. NPI 1750427480. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Geoffrey L. Uy, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Geoffrey L. Uy accept Medicare assignment?
Yes. Medicare's clinician data says Geoffrey L. Uy accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Geoffrey L. Uy see?
In 2024, CMS data shows 262 Original Medicare patients and 38,195 services for Geoffrey L. Uy. This counts Original Medicare only and measures volume, not quality.
What is Geoffrey L. Uy's NPI number?
1750427480. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Geoffrey L. Uy, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients262
Services billed to Medicare38,195
Different services or procedures117
Participating Medicare providerYes
Average age of these patients69

Most frequent services

  1. Injection, fosaprepitant, 1 mg (J1453)2,700 services
  2. Injection, dexamethasone sodium phosphate, 1 mg (J1100)530 services
  3. Injection, palonosetron hcl, 25 mcg (J2469)340 services
  4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)166 services
  5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)149 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure74%
  • High cholesterol67%
  • Arthritis43%
  • Ischemic heart disease33%
  • Chronic kidney disease32%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)32%

Hospitals where Geoffrey L. Uy works

Medicare's Facility Affiliation Data lists Geoffrey L. Uy at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Geoffrey L. Uy is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Geoffrey L. Uy as a member of this group (CMS data updated October 2, 2026).

  • 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 →

Other clinicians in Washington University

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolWashington University School Of Medicine
Graduation year2001 (25 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1750427480
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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians