Sergio Casillas Berumen, MD

Medicare activity in 2024

Official CMS public-use data for Sergio Casillas Berumen, 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. Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)3,098 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)254 services
3. Use of a drug to induce depression of consciousness by physician performing a procedure, each additional 15 minutes (99153)137 services
4. Injection, heparin sodium, per 1000 units (J1644)82 services
5. Injection, midazolam hydrochloride, per 1 mg (J2250)71 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%
• Chronic kidney disease67%
• Heart failure47%
• Ischemic heart disease46%

Hospitals where Sergio Casillas Berumen works

Medicare's Facility Affiliation Data lists Sergio Casillas Berumen 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.

• Scripps Mercy HospitalSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050077
• Sharp Chula Vista Medical CenterChula Vista, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050222

Practice locations

Addresses where Sergio Casillas Berumen is enrolled with Medicare (CMS data updated October 2, 2026).

• 1111 Broadway, Suite 305Chula Vista, CA 91911 (619) 567‑7007
• 6719 Alvarado Rd, Suite 303San Diego, CA 92120 (619) 567‑7007

Group practices

Medicare enrollment lists Sergio Casillas Berumen as a member of this group (CMS data updated October 2, 2026).

• Sasha Salloum MD Inc a Professional Medical Corporation8 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in California →

Other general surgeons in Chula Vista

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

• Rodolfo Arcovedo, MD
• Bradford T. Hsu, MD
• John Alec G. Moral, MD
• Andrew S. Hsu, MD
• Yifan Yang, MD
• Allan Gamagami, MD
• Clifton R. Ewbank, MD
• Stefan Moldovan, MD

All general surgeons in Chula Vista →

Other clinicians in Sasha Salloum MD Inc a Professional Medical Corporation

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

• Marc A. Hare, MD
• Kristal Jaime, NP
• Joseph H. Chammas, MD
• Stefan Moldovan, 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