NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1003203167
Verify on CMS → Aileen Tamura
Hospitalist 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 16,825 in Hospitalist 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
456
Medicare Part D claims · 126 beneficiaries · Hospitalist Physician avg: 888
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Aileen Tamura filed 456 Medicare Part D claims in 2023 as a Hospitalist Physician in Honolulu, Hawaii.
- 456
- Part D claims, 2023
- 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.
Aileen Tamura's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
456 Top 38% higher than 62% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Aileen Tamura practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Aileen Tamura?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
456 49% vs specialty avg
Specialty distribution in Hawaii
How Hospitalist Physician compares to other specialties among Hawaii providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Hospitalist Physician. Verify directly:
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).
Aileen Tamura appears in the CMS NPPES registry as a Hospitalist Physician provider at 3288 MOANALUA RD, Honolulu, HI, 96819, with a listed phone of (808) 432-0000. NPI 1003203167 was issued on 04/16/2015.
Medicare Part D records for calendar year 2023 show 456 prescription claims written by this provider, covering 126 Medicare beneficiaries and totaling roughly $18K in drug spend.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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 | 1003203167 |
|---|---|
| Specialty | Hospitalist Physician |
| Gender | Female |
| NPI Issued | 04/16/2015 |
Hospital and facility affiliations
Facilities where Aileen Tamura 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.
Hawaii Permanente Medical Group 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
456
Total Claims
$18K
Total Drug Cost
126
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 645
- Total Day Supply
- 16,638
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 56
Patient Demographics
- Average Patient Age
- 77.7 years
- Avg HCC Risk Score
- 3.53
- Gender Split
- 44% female / 56% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Aileen Tamura prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cefpodoxime Proxetil
Cefpodoxime Proxetil
21 claims
- Gabapentin
Gabapentin
21 claims
- Atorvastatin Calcium
Atorvastatin Calcium
20 claims
- Losartan Potassium
Losartan Potassium
20 claims
- Torsemide
Torsemide
19 claims
- Allopurinol
Allopurinol
18 claims
- Metoprolol Succinate
Metoprolol Succinate
17 claims
- Pradaxa
Pradaxa
17 claims
| Drug | Claims |
|---|---|
| Cefpodoxime Proxetil | 21 |
| Gabapentin | 21 |
| Atorvastatin Calcium | 20 |
| Losartan Potassium | 20 |
| Torsemide | 19 |
| Allopurinol | 18 |
| Metoprolol Succinate | 17 |
| Pradaxa Dabigatran Etexilate Mesylate | 17 |
| Clopidogrel Clopidogrel Bisulfate | 13 |
| Warfarin Sodium | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Aileen Tamura fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Aileen Tamura's 456 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Tamura.
Dr. David Adler
MD
Lihue, HI
Dr. Mohammed Ali
MD
Honolulu, HI
Maya Antoine
Tripler Army Medical Center, HI
Dr. Wint Aye
MD
Honolulu, HI
Dr. Imtiaz Bangash
MD
Honolulu, HI
Compare Hospitalist 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 Hospitalist 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Hawaii
Frequently Asked Questions
What is Aileen Tamura's specialty? ▼
Aileen Tamura specializes in Hospitalist Physician and practices in Honolulu, Hawaii.
How much does Aileen Tamura prescribe under Medicare Part D? ▼
In 2023, Aileen Tamura wrote 456 Medicare Part D claims totaling $18K in drug costs for 126 beneficiaries.
Where is Aileen Tamura located? ▼
Aileen Tamura is located at 3288 MOANALUA RD, Honolulu, HI, 96819. Phone: (808) 432-0000.
What is Aileen Tamura's NPI number? ▼
Aileen Tamura's National Provider Identifier (NPI) is 1003203167, issued on 04/16/2015.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Aileen Tamura prescribe most often? ▼
Based on 2023 Medicare Part D data, Aileen Tamura's most frequently prescribed drugs include Cefpodoxime Proxetil, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Aileen Tamura accept Medicare? ▼
Aileen Tamura appears in CMS Medicare data with 456 Part D claims and 126 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aileen Tamura's credentials? ▼
Aileen Tamura's NPI is 1003203167. 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.
- 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.