Lauren Santiesteban, MD

Medicare activity in 2024

Official CMS public-use data for Lauren 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. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)205 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)93 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)86 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)69 services
5. Injection of drug or substance under skin or into muscle (96372)57 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 cholesterol70%
• Arthritis67%
• High blood pressure58%
• Osteoporosis26%
• Anxiety24%
• Depression18%

Hospitals where Lauren Santiesteban works

Medicare's Facility Affiliation Data lists Lauren 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.

• Marinhealth Medical CenterGreenbrae, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050360
• UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454

Practice locations

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

• 1600 Divisadero StSan Francisco, CA 94115 (415) 476‑1000
• 1600 Divisadero St, McB302San Francisco, CA 94115 (415) 476‑1000
• 2330 Post StSan Francisco, CA 94115 (415) 476‑4029
• 400 Parnassus AveSan Francisco, CA 94143
• 505 Parnassus AveSan Francisco, CA 94143 (415) 476‑1000

Group practices

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

• University of California San Francisco1,839 clinicians in the group
• UCSF Medical Group Business Services1,598 clinicians in the group
• Regents Univ of California UCSF283 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in San Francisco

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

• Jennifer W. Liu, MD
• Thomas C. Barber, MD
• Anthony Luke, MD
• Keith C. Donatto, MD
• Philip Kaiser, MD
• James D. Kelly Ii, MD
• Eric D. Bava, MD
• Edward Diao, MD

All orthopedic surgeons in San Francisco →

Other clinicians in University of California San Francisco

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

• Nicholas A. Kolaitis
• Nicole M. Pulley, MD
• Anthony Lee, MD
• Elizabeth Kwan, MD
• Stacy Wong, NP
• Rose A. Monahan, 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