Ruben Guzman Jr Jr., MD

Medicare activity in 2024

Official CMS public-use data for Ruben Guzman Jr Jr., 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. Emergency department visit with high level of medical decision making (99285)43 services
2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)25 services
3. Critical care, first 30-74 minutes (99291)14 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%
• Diabetes53%
• Arthritis53%
• Chronic kidney disease39%
• Anxiety37%

Hospitals where Ruben Guzman Jr Jr. works

Medicare's Facility Affiliation Data lists Ruben Guzman Jr Jr. 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.

• Kaiser Foundation Hospital - DowneyDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 050139
• 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
• Southern Coos Hospital & Health CenterBandon, OR · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 381304

Practice locations

Addresses where Ruben Guzman Jr Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
• 12401 Washington BlvdWhittier, CA 90602 (562) 698‑0811

Group practices

Medicare enrollment lists Ruben Guzman Jr Jr. as a member of this group (CMS data updated October 2, 2026).

• Intercommunity Emergency Medical Group67 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Downey

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

• Joshua Brown, DO
• Alexander W. Daguanno, MD
• Tianci Liu, MD
• Mercedeh Modir Shanechi, MD
• Elizabeth T. Ferreira, MD
• David R. Sharma, MD
• Jose M. Villacorta Jr., MD
• Omeed Moalikyar, MD

All emergency medicine doctors in Downey →

Other clinicians in Intercommunity Emergency Medical Group

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

• Arthur W. Williams, PA
• Mansour G. Jammal
• Michael S. Lee, MD
• Darlene J. Curran, MD
• Alejandro J. Perez-Sandi, NP
• Michael A. Casares, MD

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