Aya Kamaya, MD

Medicare activity in 2024

Official CMS public-use data for Aya Kamaya, 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. Ct scan of abdomen and pelvis with contrast (74177)240 services
2. X-ray of abdomen, 1 view (74018)183 services
3. Mri scan of abdomen before and after contrast (74183)99 services
4. Ultrasound study of arm or leg veins with compression and maneuvers (93970)93 services
5. Ct scan of chest with contrast (71260)83 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%
• Arthritis40%
• Diabetes38%
• Chronic kidney disease38%
• Ischemic heart disease36%

Hospitals where Aya Kamaya works

Medicare's Facility Affiliation Data lists Aya Kamaya 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
• Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050283

Practice locations

Addresses where Aya Kamaya is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.

• 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
• 5555 W Las Positas BlvdPleasanton, CA 94588 (925) 847‑3000

Group practices

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

• Stanford Health Care3,122 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in California →

Other radiologists in Redwood City

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

• Todd K. Osinski, MD
• Gennady Shiferman, MD
• Haicheng A. Yu, MD
• Geoffrey M. Riley, MD
• Lawrence C. Chow, MD
• Andrew S. Roberts, MD
• Dominik Fleischmann, MD
• Ann N. Leung, MD

All radiologists in Redwood City →

Other clinicians in Stanford Health Care

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

• Katherine E. Williams, MD
• Stephen R. Viess, MD
• Charles P. Callihan Jr., MD
• Thomas T. Chen, MD
• Elan C. Burton, MD
• Pedro Alvarez, 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