Quick answers
- Does Robert P. Mastroianni accept Medicare assignment?
- Yes. Medicare's clinician data says Robert P. Mastroianni 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 Robert P. Mastroianni see?
- In 2024, CMS data shows 230 Original Medicare patients and 2,770 services for Robert P. Mastroianni. This counts Original Medicare only and measures volume, not quality.
- What is Robert P. Mastroianni's NPI number?
- 1023107844. 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 Robert P. Mastroianni, 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 | 230 |
|---|---|
| Services billed to Medicare | 2,770 |
| Different services or procedures | 43 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)818 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)417 services
- Advance care planning, first 30 minutes (99497)302 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)259 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)172 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%
- Arthritis48%
- High blood pressure47%
- Ischemic heart disease30%
- Depression20%
- Anxiety20%
Practice locations
Addresses where Robert P. Mastroianni is enrolled with Medicare (CMS data updated October 2, 2026).
- 81 Makawao Ave, Suite 100Makawao, HI 96768 (808) 573‑8900
Group practices
Medicare enrollment lists Robert P. Mastroianni as a member of this group (CMS data updated October 2, 2026).
- Pukalani Family Practice LLC3 clinicians in the group
Specialties
- Family Practiceprimary
- Emergency Medicinealso
Other family doctors in Hawaii
Clinicians with the same Medicare primary specialty in Hawaii — not a recommendation.
Other clinicians in Pukalani Family Practice LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1023107844 |
| 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
- 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