NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1023107844 MD
Verify on CMS → Robert Mastroianni, MD
Family Medicine Physician in Makawao, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
130
Medicare Part D claims · 49 beneficiaries · Family Medicine Physician avg: 3K
MIPS score
75/100
CMS neutral threshold · no category scores published
What the federal data shows
Robert Mastroianni, MD carries the neutral CMS MIPS final score of 75/100, assigned where no category was scored - and filed 130 Medicare Part D claims in 2023.
- 75/100
- CMS neutral score · not measured
- 130
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥35th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Robert Mastroianni, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1023107844), first enumerated 10/11/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 130 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
CMS assigned a neutral MIPS final score of 75/100 where no performance category was scored — not a measured quality rank.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1023107844 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-NEUTRAL · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1023107844
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- MIPS-NEUTRAL 75/100
- RX-LIGHT 130
- BOOK-LIGHT 679 in Hawaii
- PHOTO-ENUM Eric Warwick · 2006
Robert Mastroianni, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
130 ≥ 35th percentile 35% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Robert Mastroianni, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Robert Mastroianni, MD?
CMS neutral score, not measuredPrimary specialty
Family Medicine Physician
Medicare Part D claims
130 96% vs specialty avg
MIPS final score
75/100
Specialty distribution in Hawaii
How Family Medicine Physician compares to other specialties among Hawaii providers
MIPS score not measured
CMS assigned a neutral 75/100 threshold
CMS did not publish any Quality, Cost, Promoting Interoperability, or Improvement Activities category score for this clinician. This administrative threshold is not comparable with the national average of clinicians whose MIPS score was measured.
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1023107844 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/11/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
75
Final Score
CMS neutral threshold · not measured
Reporting: Individual
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
130
Total Claims
$25K
Total Drug Cost
49
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 296
- Total Day Supply
- 8,324
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.31
- Gender Split
- 33% female / 67% male
Family Medicine Physician Overview
How Robert Mastroianni, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Robert Mastroianni, MD's 130 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mastroianni, both outside Hawaii so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (75 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Mastroianni.
One of 679 Family Medicine Physician providers enrolled in Hawaii, 5 are shown here.
Dr. Jenifer Aaronson
M.D.
Kamuela, HI
Dr. Sharita Abbott
M.D.
Lahaina, HI
Dr. David Abelson
MD
Kahului, HI
Dr. Alex Aberin
MD
Papaikou, HI
Dr. Danielle Dawn Acacio
MD
Jbphh, HI
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robert Mastroianni, MD's specialty? ▼
Robert Mastroianni, MD specializes in Family Medicine Physician and practices in Makawao, Hawaii. Credentials: MD.
How much does Robert Mastroianni, MD prescribe under Medicare Part D? ▼
In 2023, Robert Mastroianni, MD wrote 130 Medicare Part D claims totaling $25K in drug costs for 49 beneficiaries.
What is Robert Mastroianni, MD's Medicare quality score? ▼
Robert Mastroianni, MD has a CMS MIPS Final Score of 75/100. CMS published no Quality, Promoting Interoperability, Improvement Activity or Cost score for this clinician, so the final score is the neutral performance threshold CMS assigns rather than a measured result. The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Robert Mastroianni, MD located? ▼
Robert Mastroianni, MD is located at 81 MAKAWAO AVE STE 25, Makawao, HI, 96768. Phone: (808) 573-8900.
What is Robert Mastroianni, MD's NPI number? ▼
Robert Mastroianni, MD's National Provider Identifier (NPI) is 1023107844, issued on 10/11/2006.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
Does Robert Mastroianni, MD accept Medicare? ▼
Robert Mastroianni, MD appears in CMS Medicare data with 130 Part D claims and 49 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Mastroianni, MD's credentials? ▼
Robert Mastroianni, MD's NPI is 1023107844 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.