Donald J. Portocarrero, DO

Medicare activity in 2024

Official CMS public-use data for Donald J. Portocarrero, 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.

Most frequent services

1. Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)53 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)50 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)41 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)38 services
5. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)13 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%
• Diabetes57%
• Arthritis53%
• Chronic kidney disease47%
• Ischemic heart disease40%

Hospitals where Donald J. Portocarrero works

Medicare's Facility Affiliation Data lists Donald J. Portocarrero 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.

• Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050103
• USC Arcadia HospitalArcadia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050238

Practice locations

Addresses where Donald J. Portocarrero is enrolled with Medicare (CMS data updated October 2, 2026).

• 623 W Duarte Rd, Suite 8Arcadia, CA 91007 (626) 461‑5408

Specialties

• Internal Medicineprimary
• Gastroenterologyalso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Arcadia

Clinicians with the same Medicare primary specialty in Arcadia, CA — not a recommendation.

• Loanne B. Tran, MD
• Pang-Chieh J. Eu, MD
• Josh J. Weng, MD
• Angela R. Hay, MD
• Wencheng Jen, MD
• Maria R. Santos-Montemayor, MD
• Andrew Lee, MD
• Lusine Soghbatyan, MD

All internal medicine doctors in Arcadia →

Clinician information

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