Quick answers
- Does Brooke Hayashi accept Medicare assignment?
- Yes. Medicare's clinician data says Brooke Hayashi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Brooke Hayashi see?
- In 2024, CMS data shows 35 Original Medicare patients and 56 services for Brooke Hayashi. This counts Original Medicare only and measures volume, not quality.
- What is Brooke Hayashi's NPI number?
- 1730427923. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Brooke Hayashi, 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.
| Original Medicare patients | 35 |
|---|---|
| Services billed to Medicare | 56 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)12 services
- Replacement of knee joint, both sides of knee (27447)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 pressure71%
- Arthritis71%
- Diabetes31%
Hospitals where Brooke Hayashi works
Medicare's Facility Affiliation Data lists Brooke Hayashi 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.
- Hilo Benioff Medical CenterHilo, HI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 120005
Practice locations
Addresses where Brooke Hayashi is enrolled with Medicare (CMS data updated October 2, 2026).
- 1190 Waianuenue AveHilo, HI 96720 (808) 932‑3000
Group practices
Medicare enrollment lists Brooke Hayashi as a member of these groups (CMS data updated October 2, 2026).
- Kau Hospital140 clinicians in the group
- Hilo Benioff Medical Center129 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Hilo
Clinicians with the same Medicare primary specialty in Hilo, HI — not a recommendation.
Other clinicians in Kau Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1730427923 |
| Corrections | Report an error or suggest an update → |
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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians