NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1811250566 M.D.
Verify on CMS → Cori-Ann Hirai, M.D.
Obstetrics & Gynecology Physician in Honolulu, 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 44,326 in Obstetrics & Gynecology 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
47
Medicare Part D claims · 23 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
64%
generic claims · 36% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
85.8/100
▲ 2 pts above national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Cori-Ann Hirai, M.D. reported a CMS MIPS final score of 85.8/100 - above the 83.5 national average - and filed 47 Medicare Part D claims in 2023.
- 85.8/100
- MIPS score · +2 vs avg
- 47
- Part D claims, 2023
- 64%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Cori-Ann Hirai, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
86 ≥ 46th percentile 46% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Cori-Ann Hirai, M.D. sits
This provider among obstetrics & gynecology physician peers
Across the 7,360 obstetrics & gynecology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Cori-Ann Hirai, M.D. writes more Part D claims than 24% of them and scores higher on MIPS quality than 45% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one obstetrics & gynecology physician peer from a representative sample of 60; the gold marker is Cori-Ann Hirai, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Cori-Ann Hirai, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 3 hospital affiliations - 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 Cori-Ann Hirai, M.D.?
High performer (top quartile)Primary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
47 74% vs specialty avg
MIPS final score
85.8/100 2.3 pts vs avg
Specialty distribution in Hawaii
How Obstetrics & Gynecology Physician compares to other specialties among Hawaii providers
Medicare quality performance, MIPS
Cori-Ann Hirai, M.D.'s 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average
- MIPS Final Score
- 85.8/100
- vs 83.5 national avg · 2023 performance year
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).
Cori-Ann Hirai, M.D. appears in the CMS NPPES registry as an Obstetrics & Gynecology Physician provider holding M.D. credentials at 1319 PUNAHOU ST, Honolulu, HI, 96826, with a listed phone of (808) 203-6518. NPI 1811250566 was issued on 06/18/2012.
Medicare Part D records for calendar year 2023 show 47 prescription claims written by this provider, covering 23 Medicare beneficiaries and totaling roughly $28K in drug spend, split 36% brand-name and 64% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 85.8/100 for the 2023 performance year (Quality 83, Cost 69.7), compared with the 83.5 average among clinicians with a measured score.
Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,326 enrolled providers across 56 states and an average of 179 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1811250566 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/18/2012 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
85.7841
Final Score
Measured-score avg: 83.5
82.9618
Quality
69.652
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Cori-Ann Hirai, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Cori-Ann Hirai, M.D. is affiliated with 3 Medicare-billing facilities, 1 of which carry a CMS Hospital overall star rating.
Pali Momi Medical Center
★★★★☆ 4/5
Aiea, HI
Acute Care Hospitals
CMS CCN: 120026
Kapiolani Medical Center For Women And Children
Honolulu, HI
Kapiolani Medical Specialists
Honolulu, HI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Cori-Ann Hirai, M.D. - brand share 36.0%
Obstetrics & Gynecology Physician average
36% brand-name claims vs 64% generic, on 47 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
47
Total Claims
$28K
Total Drug Cost
23
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 150
- Total Day Supply
- 4,386
- Brand vs Generic
- 36% brand / 64% generic
- Brand Drug Cost
- $26K
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Prolia Denosumab | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics & Gynecology Physician Overview
How Cori-Ann Hirai, M.D. fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Cori-Ann Hirai, M.D.'s 47 claims are below the specialty average of 179.
Nearby Obstetrics & Gynecology Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Hirai.
One of 287 Obstetrics & Gynecology Physician providers enrolled in Hawaii, 5 are shown here.
Dr. Michael Aaronoff
MD
Waipahu, HI
Dr. Celeste Adrian
M.D.
Wailuku, HI
Dr. Tod Aeby
MD
Honolulu, HI
Dr. Aaron Altura
M.D.
Wailuku, HI
Dr. Elenita Alvarez
MD
Honolulu, HI
Compare Obstetrics & Gynecology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Hawaii medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Obstetrics & Gynecology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Cori-Ann Hirai, M.D.'s specialty? ▼
Cori-Ann Hirai, M.D. specializes in Obstetrics & Gynecology Physician and practices in Honolulu, Hawaii. Credentials: M.D..
How much does Cori-Ann Hirai, M.D. prescribe under Medicare Part D? ▼
In 2023, Cori-Ann Hirai, M.D. wrote 47 Medicare Part D claims totaling $28K in drug costs for 23 beneficiaries.
What is Cori-Ann Hirai, M.D.'s Medicare quality score? ▼
Cori-Ann Hirai, M.D. has a CMS MIPS Final Score of 85.8/100 (Quality: 83, Cost: 69.7). 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 Cori-Ann Hirai, M.D. located? ▼
Cori-Ann Hirai, M.D. is located at 1319 PUNAHOU ST, Honolulu, HI, 96826. Phone: (808) 203-6518.
What is Cori-Ann Hirai, M.D.'s NPI number? ▼
Cori-Ann Hirai, M.D.'s National Provider Identifier (NPI) is 1811250566, issued on 06/18/2012.
Does Cori-Ann Hirai, M.D. prescribe more brand-name or generic drugs? ▼
Cori-Ann Hirai, M.D.'s prescribing is 36% brand-name and 64% generic drugs by claim count, with $26K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does Cori-Ann Hirai, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Cori-Ann Hirai, M.D.'s most frequently prescribed drugs include Prolia. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cori-Ann Hirai, M.D. accept Medicare? ▼
Cori-Ann Hirai, M.D. appears in CMS Medicare data with 47 Part D claims and 23 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cori-Ann Hirai, M.D.'s credentials? ▼
Cori-Ann Hirai, M.D.'s NPI is 1811250566 with credentials M.D.. 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.