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Medical Oncology

Ubaldo E. Martinez-Outschoorn, MD

Works at hospitals in Philadelphia, PA · Pennsylvania

Summary

Dr. Ubaldo E. Martinez-Outschoorn, MD is an oncologist at 925 Chestnut St, Suite 3, Philadelphia, PA 19107. Phone: (215) 955-8874. Accepts Medicare assignment. In 2024, Ubaldo E. Martinez-Outschoorn had 207 Original Medicare patients and 540 services. NPI 1801004106. 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.

  • Specialty: Oncologist (Medicare lists Medical Oncology)
  • Address: 925 Chestnut St, Suite 3, Philadelphia, PA 19107 · Directions
  • Phone: (215) 955‑8874
  • Medicare: Accepts Medicare assignment
  • Hospital: Thomas Jefferson University Hospital
  • Group practice: Jefferson University Physicians
  • Medical school: graduated 2002 (24 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Ubaldo E. Martinez-Outschoorn, 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 Ubaldo E. Martinez-Outschoorn accept Medicare assignment?
Yes. Medicare's clinician data says Ubaldo E. Martinez-Outschoorn 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 Ubaldo E. Martinez-Outschoorn see?
In 2024, CMS data shows 207 Original Medicare patients and 540 services for Ubaldo E. Martinez-Outschoorn. This counts Original Medicare only and measures volume, not quality.
What is Ubaldo E. Martinez-Outschoorn's NPI number?
1801004106. 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 Ubaldo E. Martinez-Outschoorn, 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 patients207
Services billed to Medicare540
Different services or procedures16
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)172 services
  2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)163 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)72 services
  4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)37 services
  5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)21 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 pressure75%
  • High cholesterol75%
  • Arthritis49%
  • Chronic kidney disease40%
  • Ischemic heart disease39%
  • Diabetes31%

Hospitals where Ubaldo E. Martinez-Outschoorn works

Medicare's Facility Affiliation Data lists Ubaldo E. Martinez-Outschoorn 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 Ubaldo E. Martinez-Outschoorn is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Ubaldo E. Martinez-Outschoorn as a member of this group (CMS data updated October 2, 2026).

  • Jefferson University Physicians1,531 clinicians in the group

Specialties

Find other Medical Oncology doctors in Pennsylvania →

Other oncologists in Philadelphia

Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.

All oncologists in Philadelphia →

Other clinicians in Jefferson University Physicians

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

Clinician information

CredentialMD
Graduation year2002 (24 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1801004106
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