Brent M. Yamashiro, MD

Medicare activity in 2024

Official CMS public-use data for Brent M. Yamashiro, 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. Emergency department visit with high level of medical decision making (99285)154 services
2. Emergency department visit with moderate level of medical decision making (99284)92 services
3. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)77 services
4. Emergency department visit with low level of medical decision making (99283)11 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 cholesterol75%
• High blood pressure73%
• Arthritis40%
• Diabetes34%
• Chronic kidney disease33%
• Ischemic heart disease28%

Hospitals where Brent M. Yamashiro works

Medicare's Facility Affiliation Data lists Brent M. Yamashiro 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.

• Kula HospitalKula, HI · Critical Access Hospital · closed, according to its website · CCN 121308
• Maui Memorial Medical CenterWailuku, HI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 120002

Practice locations

Addresses where Brent M. Yamashiro is enrolled with Medicare (CMS data updated October 2, 2026).

• 221 Mahalani StWailuku, HI 96793 (808) 244‑9056
• 628 7th StLanai City, HI 96763 (808) 545‑6411

Group practices

Medicare enrollment lists Brent M. Yamashiro as a member of these groups (CMS data updated October 2, 2026).

• Maui Memorial Emergency Medical Associates Inc22 clinicians in the group
• Lanai Emergency Medical Associates Inc8 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Hawaii →

Other emergency medicine doctors in Wailuku

Clinicians with the same Medicare primary specialty in Wailuku, HI — not a recommendation.

• William M. Shapiro, MD
• Khadil Hosein, MD
• Vijak S. Ayasanonda, MD
• Joseph S. Kim, MD
• Mark E. Haddad, MD
• Luchia R. Storing, MD
• Jillian H. Call, MD
• Andrew Frierson, DO

All emergency medicine doctors in Wailuku →

Other clinicians in Maui Memorial Emergency Medical Associates Inc

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

• Khadil Hosein, MD
• Vijak S. Ayasanonda, MD
• Joseph S. Kim, MD
• Andrew Frierson, DO
• Arieh M. Levine, MD
• Randy W. Stark, 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