Ronald R. Siregar, MD

Medicare activity in 2024

Official CMS public-use data for Ronald R. Siregar, 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 low level od decision making, if using time, 20 minutes or more (99213)60 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)38 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)17 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 pressure71%
• High cholesterol67%
• Diabetes43%
• Arthritis40%
• Chronic kidney disease21%
• Anxiety18%

Hospitals where Ronald R. Siregar works

Medicare's Facility Affiliation Data lists Ronald R. Siregar 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.

• Torrance Memorial Medical CenterTorrance, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050351

Practice locations

Addresses where Ronald R. Siregar is enrolled with Medicare (CMS data updated October 2, 2026).

• 824 E Carson St, Suite 203Carson, CA 90745 (310) 543‑5448

Group practices

Medicare enrollment lists Ronald R. Siregar as a member of this group (CMS data updated October 2, 2026).

• Torrance Health Association Inc299 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Carson

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

• Wendy Silva, MD
• Tu S. Om, MD
• Jed Padre, MD
• Diane Padre-Gozun, DO
• Ghazaleh Hejri, MD
• Ai-Chau Hoang, MD
• Jenny L. Batongmalaque, MD
• Jane U. Ekejiuba, MD

All family doctors in Carson →

Other clinicians in Torrance Health Association Inc

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

• Savannah R. Kimball, MD
• Valente C. Ramos, MD
• Ingrid N. Jacob-Hicks
• Michelle Y. McNee, MD
• Ruben Varghese, DO
• Tasneem A. Bholat, 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