Alfredo Castellanos, MD

Medicare activity in 2024

Official CMS public-use data for Alfredo Castellanos, 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. Critical care, first 30-74 minutes (99291)269 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)40 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%
• Diabetes75%
• Heart failure73%
• Chronic kidney disease71%
• Ischemic heart disease55%

Hospitals where Alfredo Castellanos works

Medicare's Facility Affiliation Data lists Alfredo Castellanos 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.

• PIH Health Downey HospitalDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050393
• PIH Health Hospital-WhittierWhittier, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050169

Practice locations

Addresses where Alfredo Castellanos is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
• 12401 Washington BlvdWhittier, CA 90602 (562) 698‑0811
• 12401 Washington Blvd, Suite 100Whittier, CA 90602 (562) 967‑2885
• 12462 Putnam StWhittier, CA 90602 (562) 789‑5430
• 12462 Putnam St, Suite 208Whittier, CA 90602 (562) 789‑5470

Group practices

Medicare enrollment lists Alfredo Castellanos as a member of these groups (CMS data updated October 2, 2026).

• PIH Health Physicians622 clinicians in the group
• Whittier Pulmonary and Critical Care Medical Group, Inc.15 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Internal Medicinealso
• Pulmonary Diseasealso

Find other Critical Care (Intensivists) doctors in California →

Other critical care doctors in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Imran Aurangzeb, MD
• John S. Millar, MD
• Mona Alipour, MD
• Ivanna N. Maxson, MD
• Bahram Alavynejad, MD
• Pritam Neupane, MD
• Harjoth S. Malli, MD
• Sabrina Bawa, MD

All critical care doctors in California →

Other clinicians in PIH Health Physicians

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

• Dorothy Liu-Barbaro, MD
• Xi Chen, MD
• William Kurban, MD
• Millicent O. Rovelo, MD
• Jacob W. Ries, PA
• Michael G. Noel, DO

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