NPI registry status
Active
2026 NPPES data Infectious Disease Physician NPI 1457436941 M.D.
Verify on CMS → Brian Pien, M.D.
Infectious Disease 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 8,292 in Infectious Disease 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
3K
Medicare Part D claims · 502 beneficiaries · Infectious Disease Physician avg: 816
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
96.1/100
▲ 13 pts above national avg 83.1 · Exceptional
Industry payments
$2.8K
151 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Brian Pien, M.D. reported a CMS MIPS final score of 96.1/100 - above the 83.1 national average - and filed 3,494 Medicare Part D claims in 2023.
- 96.1/100
- MIPS score · +13 vs avg
- 3K
- Part D claims, 2023
- 85%
- 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.
Brian Pien, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
96 Top 17% higher than 83% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Brian Pien, M.D. sits
This provider among infectious disease physician peers
Across the 2,276 infectious disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Brian Pien, M.D. writes more Part D claims than 96% of them and scores higher on MIPS quality than 82% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one infectious disease physician peer from a representative sample of 60; the gold marker is Brian Pien, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Brian Pien, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Brian Pien, M.D.?
High performer (top quartile)Primary specialty
Infectious Disease Physician
Medicare Part D claims
3,494 328% vs specialty avg
MIPS final score
96.1/100 13 pts vs avg
Specialty distribution in Hawaii
How Infectious Disease Physician compares to other specialties among Hawaii providers
Medicare quality performance, MIPS
Brian Pien, M.D.'s 2023 MIPS final score plotted against the Infectious Disease Physician national average
- MIPS Final Score
- 96.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Infectious Disease Physician) - 96.1/100 vs national avg 83.1
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).
Brian Pien, M.D. appears in the CMS NPPES registry as a Infectious Disease Physician provider holding M.D. credentials at 1010 S KING ST, Honolulu, HI, 96814, with a listed phone of (808) 597-8765. NPI 1457436941 was issued on 10/25/2006.
Medicare Part D records for calendar year 2023 show 3,494 prescription claims written by this provider, covering 502 Medicare beneficiaries and totaling roughly $3.0 million in drug spend, split 15% brand-name and 85% generic by claim count, with an opioid prescribing rate of 0.6%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.1/100 for the 2023 performance year (Quality 91.2, Cost 82), compared with the national average of 83.1.
Infectious Disease Physician is a mid-sized specialty nationwide, with 8,292 enrolled providers across 54 states and an average of 816 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 | 1457436941 |
|---|---|
| Specialty | Infectious Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/25/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.1032
Final Score
Avg: 83.1
91.2402
Quality
82.0238
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where Brian Pien, 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.
Internal Medicine And Infectious Disease Inc
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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Brian Pien, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.8K
Largest payer
Insmed, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Brian Pien, M.D. - brand share 15.0%
Infectious Disease Physician average
15% brand-name claims vs 85% generic, on 3,494 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.
3,494
Total Claims
$3.0M
Total Drug Cost
502
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,093
- Total Day Supply
- 156,725
- Brand vs Generic
- 15% brand / 85% generic
- Brand Drug Cost
- $2.6M
- Generic Drug Cost
- $338K
- Opioid Claims
- 22 (0.6% rate)
- Antibiotic Claims
- 1,727
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 2.85
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 69, 65-74: 184, 75-84: 180, 85+: 69
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Brian Pien, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
200 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
168 claims
- Doxycycline Hyclate
Doxycycline Hyclate
147 claims
- Ceftazidime
Ceftazidime
110 claims
- Atorvastatin Calcium
Atorvastatin Calcium
97 claims
- Ceftriaxone
Ceftriaxone
89 claims
- Meropenem
Meropenem
89 claims
- Azithromycin 79
Azithromycin
79 claims
| Drug | Claims |
|---|---|
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 200 |
| Ciprofloxacin Hcl | 168 |
| Doxycycline Hyclate | 147 |
| Ceftazidime | 110 |
| Atorvastatin Calcium | 97 |
| Ceftriaxone Ceftriaxone Sodium | 89 |
| Meropenem | 89 |
| Azithromycin | 79 |
| Methenamine Hippurate | 77 |
| Cefuroxime Cefuroxime Axetil | 76 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Infectious Disease Physician Overview
How Brian Pien, M.D. fits within the Infectious Disease Physician landscape nationally.
8,292
Infectious Disease Physician Providers in US
54
States with Infectious Disease Physician
816
Avg Claims per Provider
Brian Pien, M.D.'s 3,494 claims are above the specialty average of 816.
Nearby Infectious Disease Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Pien.
Azeem Ahsan
Honolulu, HI
Dr. Steven Berman
M.D.
Honolulu, HI
Dr. Philip Bruno
DO
Honolulu, HI
Dr. Willis Chang
M.D.
Ewa Beach, HI
Dr. Tarquin Collis
MD
Honolulu, HI
Compare Infectious Disease 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 Infectious Disease 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 Brian Pien, M.D.'s specialty? ▼
Brian Pien, M.D. specializes in Infectious Disease Physician and practices in Honolulu, Hawaii. Credentials: M.D..
How much does Brian Pien, M.D. prescribe under Medicare Part D? ▼
In 2023, Brian Pien, M.D. wrote 3,494 Medicare Part D claims totaling $3.0M in drug costs for 502 beneficiaries.
What is Brian Pien, M.D.'s Medicare quality score? ▼
Brian Pien, M.D. has a CMS MIPS Final Score of 96.1/100 (Quality: 91.2, Cost: 82). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Brian Pien, M.D. located? ▼
Brian Pien, M.D. is located at 1010 S KING ST, Honolulu, HI, 96814. Phone: (808) 597-8765.
What is Brian Pien, M.D.'s NPI number? ▼
Brian Pien, M.D.'s National Provider Identifier (NPI) is 1457436941, issued on 10/25/2006.
Does Brian Pien, M.D. prescribe more brand-name or generic drugs? ▼
Brian Pien, M.D.'s prescribing is 15% brand-name and 85% generic drugs by claim count, with $2.6M in brand drug costs.
Does Brian Pien, M.D. prescribe opioids? ▼
Yes, Brian Pien, M.D. had 22 opioid claims in 2023 with an opioid prescribing rate of 0.6%.
How many Infectious Disease Physician providers are there in the US? ▼
There are 8,292 Infectious Disease Physician providers across 54 states in the US. The average Infectious Disease Physician provider writes 816 Medicare Part D claims per year.
What drugs does Brian Pien, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Brian Pien, M.D.'s most frequently prescribed drugs include Amoxicillin-Clavulanate Potass, Ciprofloxacin Hcl, Doxycycline Hyclate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Brian Pien, M.D. accept Medicare? ▼
Brian Pien, M.D. appears in CMS Medicare data with 3,494 Part D claims and 502 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Brian Pien, M.D.'s credentials? ▼
Brian Pien, M.D.'s NPI is 1457436941 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
Compiled from official public sources by the PlainDoctor editorial team.