Ian R. Carroll, MD

Medicare activity in 2024

Official CMS public-use data for Ian R. Carroll, 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 35 minutes (99232)544 services
2. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)323 services
3. Injection of blood or blood clot into spinal canal (62273)87 services
4. Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)51 services
5. Fluoroscopic guidance for spine or back muscle injection (77003)49 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%
• Arthritis67%
• Anxiety42%
• Depression39%
• Diabetes35%

Hospitals where Ian R. Carroll works

Medicare's Facility Affiliation Data lists Ian R. Carroll 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.

• Stanford Health CareStanford, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050441

Practice locations

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

• 170 Alameda De Las PulgasRedwood City, CA 94062 (650) 369‑5811
• 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
• 420 Broadway StRedwood City, CA 94063 (650) 723‑4000
• 450 Broadway StRedwood City, CA 94063 (650) 723‑4000

Group practices

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

• Stanford Health Care3,122 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in California →

Other anesthesiologists in Redwood City

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

• Kelly L. Ly, MD
• Laura L. Chan, MD
• Giang T. Le, MD
• Lisa Tseng, MD
• Joshua D. Chiu, MD
• Ming Zhuo-Stine, MD
• Kathleen L. Vuong, MD
• Christopher Vo, DO

All anesthesiologists in Redwood City →

Other clinicians in Stanford Health Care

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

• Sharon K. Chin, PA
• Vipul R. Sheth, MD
• Christopher F. Beaulieu, MD
• Nancy M. Pham, MD
• Christopher Hydock, PA
• Calvin Santiago, 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