Walailuk Chaiyarat, MD

Medicare activity in 2024

Official CMS public-use data for Walailuk Chaiyarat, 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, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)23,460 services
2. Injection, denosumab, 1 mg (J0897)8,041 services
3. Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units (Q5106)4,320 services
4. Injection, dexamethasone sodium phosphate, 1 mg (J1100)954 services
5. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)775 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%
• Arthritis48%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)44%
• Chronic kidney disease42%
• Diabetes41%

Hospitals where Walailuk Chaiyarat works

Medicare's Facility Affiliation Data lists Walailuk Chaiyarat 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.

• John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180
• Providence Queen of the Valley Medical CenterNapa, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050009
• Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050108
• Sutter Solano Medical CenterVallejo, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050101

Practice locations

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

• 100 Hospital Dr, Suite 110bVallejo, CA 94589 (707) 551‑3333
• 2571 Park AveConcord, CA 94520 (925) 674‑2100

Group practices

Medicare enrollment lists Walailuk Chaiyarat as a member of this group (CMS data updated October 2, 2026).

• John Muir Physician Network494 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in California →

Other hematologist-oncologists in Vallejo

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

• Chainarong Limvarapuss, MD
• Antra Mahaldar, MD
• Elizabeth A. Odumakinde, MD
• Hilary C. Childers, MD
• Corey M. Schwartz, MD
• Chen Fu, MD
• Dyanesh B. Ravindran, MD
• Lesley C. Martin, MD

All hematologist-oncologists in Vallejo →

Other clinicians in John Muir Physician Network

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

• Suleiman N. Lapalme, MD
• Ruchita Savalia, DO
• Zahra Shirmohammadi, MD
• Christopher H. Swan, MD
• Immanuel A. Asuncion, MD
• Lawren S. Hicks, 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