Hector L. Santiesteban, MD

Medicare activity in 2024

Official CMS public-use data for Hector L. Santiesteban, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)97 services
2. Dialysis services, 4 or more physician visits per month (20 years or older) (90960)88 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)76 services
4. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)59 services
5. Hemodialysis procedure with physician evaluation (90935)23 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 disease75%
• Heart failure66%
• Ischemic heart disease56%

Hospitals where Hector L. Santiesteban works

Medicare's Facility Affiliation Data lists Hector L. Santiesteban 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.

• Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007
• San Mateo Medical CenterSan Mateo, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050113
• UCSF Health Hyde HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050152

Practice locations

Addresses where Hector L. Santiesteban is enrolled with Medicare (CMS data updated October 2, 2026).

• 1750 El Camino Real, Suite 15Burlingame, CA 94010 (650) 692‑6302
• 222 W 39th AveSan Mateo, CA 94403

Group practices

Medicare enrollment lists Hector L. Santiesteban as a member of these groups (CMS data updated October 2, 2026).

• County of San Mateo310 clinicians in the group
• San Mateo Dialysis Associates7 clinicians in the group

Specialties

• Nephrologyprimary
• Internal Medicinealso

Find other Nephrology doctors in California →

Other nephrologists in Burlingame

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

• Fred M. Lui
• Ian E. McCoy, MD
• Gabriel Loeb, MD
• Josephus Sanjorjo, MD
• Leena M. Joshi, MD
• Justin O. Oveyssi, DO
• Adrian Whelan, MD

All nephrologists in Burlingame →

Other clinicians in County of San Mateo

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

• Tomoki Kimura, MD
• Elisa Frances R. Nasol, MD
• Chuan Hsin Chang, MD
• Michael L. Getzell, MD
• Amanda M. Romero, NP
• Fred M. Lui

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