Karin L. Siguenza, MD

Medicare activity in 2024

Official CMS public-use data for Karin L. Siguenza, 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)69 services
2. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)44 services
3. Critical care, first 30-74 minutes (99291)12 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%
• Diabetes61%
• Arthritis53%
• Anxiety44%
• Depression42%

Hospitals where Karin L. Siguenza works

Medicare's Facility Affiliation Data lists Karin L. Siguenza 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
• 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 Karin L. Siguenza 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 Karin L. Siguenza 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.

• Rayyan Kadi, MD
• Alexander Pezeshki, MD
• Chelsea Schmidt, DO
• Benjamin Partiali, MD
• Stephen J. Bauer, MD
• Bijan J. Arab, DO
• Mercedeh Modir Shanechi, MD
• Sandra Isnasious, 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.

• Laurie M. Krass, MD
• Colin C. Hoff, MD
• Rayyan Kadi, MD
• Chelsea Schmidt, DO
• Benjamin Partiali, MD
• Corey D. Young, 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