Gonzalo Castaneda, MD

Medicare activity in 2024

Official CMS public-use data for Gonzalo Castaneda, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)107 services
2. Insertion of needle into vein for collection of blood sample (36415)42 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)25 services
4. Telephone medical discussion with physician, 11-20 minutes (99442)25 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 cholesterol58%
• Diabetes57%
• Chronic kidney disease37%
• Arthritis26%
• Heart failure24%

Hospitals where Gonzalo Castaneda works

Medicare's Facility Affiliation Data lists Gonzalo Castaneda 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.

• Lac/Harbor-Ucla Medical CenterTorrance, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050376
• Lac/Rancho Los Amigos National Rehabilitation CenterDowney, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050717

Practice locations

Addresses where Gonzalo Castaneda is enrolled with Medicare (CMS data updated October 2, 2026).

• 10005 Flower StBellflower, CA 90706 (562) 753‑2315
• 1333 Chestnut AveLong Beach, CA 90813 (562) 753‑2315

Group practices

Medicare enrollment lists Gonzalo Castaneda as a member of this group (CMS data updated October 2, 2026).

• County of Los Angeles397 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Bellflower

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

• Virgilio C. Panganiban, MD
• Olivia C. Hayostek, MD
• Sarah Grewal, MD
• Paul P. Lai, DO
• Ying T. Zhang, MD
• Francesca M. Taylor, MD
• Craig Lum, DO
• Sitaravamma Murakonda, MD

All family doctors in Bellflower →

Other clinicians in County of Los Angeles

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

• Beatriz Gomez-Matta, MD
• Gia Humelbaugh, MD
• Phil B. Tsai, MD
• Aurora A. Manalo, NP
• Giovani V. Cruz Cruz, MD
• Leona R. Mason, NP

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