Worasak Keeyapaj, MD

Medicare activity in 2024

Official CMS public-use data for Worasak Keeyapaj, 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. Insertion of artery tube for blood sampling or infusion through skin (36620)56 services
2. Ultrasound of heart with probe in esophagus, with report (93312)38 services
3. Anesthesia for x-ray or radiation therapy (01922)35 services
4. Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)27 services
5. Anesthesia for procedure on heart and large blood vessels (00560)20 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%
• Heart failure69%
• Atrial fibrillation69%
• Ischemic heart disease68%
• Chronic kidney disease66%

Hospitals where Worasak Keeyapaj works

Medicare's Facility Affiliation Data lists Worasak Keeyapaj 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 Worasak Keeyapaj is enrolled with Medicare (CMS data updated October 2, 2026).

• 300 Pasteur DrStanford, CA 94305 (650) 723‑4000
• 5800 Hollis StEmeryville, CA 94608 (510) 806‑2100

Group practices

Medicare enrollment lists Worasak Keeyapaj 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 Stanford

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

• Brice Gaudilliere, MD
• Pedro P. Tanaka, MD
• Emily A. Stockert, MD
• An D. La, MD
• Vanila M. Singh, MD
• Makela C. Stankey, MD
• Rakesh Sondekoppam Vijayashankar, MD
• Lawrence F. Chu, MD

All anesthesiologists in Stanford →

Other clinicians in Stanford Health Care

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

• Davud Baradaran Sirjani, MD
• Robert L. Dodd, MD
• Priya G. Kumaravelu, MD
• Michelle M. Nguyen, MD
• Paul D. Blumenthal, MD
• Sarah L. Russell, 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