NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1205031283 M.D,
Verify on CMS → Hitomi Nakai, M.D,
Internal Medicine Physician in Newberg, Oregon.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal 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
736
Medicare Part D claims · 240 beneficiaries · Internal Medicine Physician avg: 3K
What the federal data shows
Hitomi Nakai, M.D, filed 736 Medicare Part D claims in 2023 as an Internal Medicine Physician in Newberg, Oregon.
- 736
- 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.
Hitomi Nakai, M.D,'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
736 Top 29% higher than 71% 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)
Hitomi Nakai, M.D, 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 Hitomi Nakai, M.D,?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
736 73% vs specialty avg
Specialty distribution in Oregon
How Internal Medicine Physician compares to other specialties among Oregon 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 Internal Medicine 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).
Hitomi Nakai, M.D, appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D, credentials at 1001 N PROVIDENCE DR, Newberg, OR, 97132, with a listed phone of (503) 537-5962. NPI 1205031283 was issued on 06/19/2007.
Medicare Part D records for calendar year 2023 show 736 prescription claims written by this provider, covering 240 Medicare beneficiaries and totaling roughly $61K in drug spend, with an opioid prescribing rate of 3.7%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1205031283 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D, |
| Gender | Female |
| NPI Issued | 06/19/2007 |
Hospital and facility affiliations
Facilities where Hitomi Nakai, 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.
Kaiser Foundation Health Plan OF The Northwest
Clackamas, OR
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.
736
Total Claims
$61K
Total Drug Cost
240
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,264
- Total Day Supply
- 34,059
- Generic Drug Cost
- $12K
- Opioid Claims
- 27 (3.7% rate)
- Antibiotic Claims
- 78
Patient Demographics
- Average Patient Age
- 77.0 years
- Avg HCC Risk Score
- 2.52
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 14, 65-74: 80, 75-84: 98, 85+: 48
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Hitomi Nakai, M.D, prescribes most
Top Medicare Part D drugs by claim count, 2023
- Potassium Chloride
Potassium Chloride
53 claims
- Atorvastatin Calcium
Atorvastatin Calcium
44 claims
- Clopidogrel
Clopidogrel
33 claims
- Metoprolol Succinate
Metoprolol Succinate
29 claims
- Lisinopril
Lisinopril
26 claims
- Furosemide
Furosemide
22 claims
- Pradaxa 20
Pradaxa
20 claims
- Metoprolol Tartrate 19
Metoprolol Tartrate
19 claims
| Drug | Claims |
|---|---|
| Potassium Chloride | 53 |
| Atorvastatin Calcium | 44 |
| Clopidogrel Clopidogrel Bisulfate | 33 |
| Metoprolol Succinate | 29 |
| Lisinopril | 26 |
| Furosemide | 22 |
| Pradaxa Dabigatran Etexilate Mesylate | 20 |
| Metoprolol Tartrate | 19 |
| Torsemide | 17 |
| Jardiance Empagliflozin | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Hitomi Nakai, M.D, fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Hitomi Nakai, M.D,'s 736 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Nakai.
Dr. Charmaine Clarisse Abalos
M.D.
Medford, OR
Dr. Soraya Abbassian
M.D.
Portland, OR
Dr. Nicholas Abbott
M.D.
Tualatin, OR
Dr. Mohamed Abdel Khalek
M.D
Roseburg, OR
Dr. Amged Abdelaziz
MD
Portland, OR
Compare Internal Medicine 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 Oregon medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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 Hitomi Nakai, M.D,'s specialty? ▼
Hitomi Nakai, M.D, specializes in Internal Medicine Physician and practices in Newberg, Oregon. Credentials: M.D,.
How much does Hitomi Nakai, M.D, prescribe under Medicare Part D? ▼
In 2023, Hitomi Nakai, M.D, wrote 736 Medicare Part D claims totaling $61K in drug costs for 240 beneficiaries.
Where is Hitomi Nakai, M.D, located? ▼
Hitomi Nakai, M.D, is located at 1001 N PROVIDENCE DR, Newberg, OR, 97132. Phone: (503) 537-5962.
What is Hitomi Nakai, M.D,'s NPI number? ▼
Hitomi Nakai, M.D,'s National Provider Identifier (NPI) is 1205031283, issued on 06/19/2007.
Does Hitomi Nakai, M.D, prescribe opioids? ▼
Yes, Hitomi Nakai, M.D, had 27 opioid claims in 2023 with an opioid prescribing rate of 3.7%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Hitomi Nakai, M.D, prescribe most often? ▼
Based on 2023 Medicare Part D data, Hitomi Nakai, M.D,'s most frequently prescribed drugs include Potassium Chloride, Atorvastatin Calcium, Clopidogrel. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hitomi Nakai, M.D, accept Medicare? ▼
Hitomi Nakai, M.D, appears in CMS Medicare data with 736 Part D claims and 240 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hitomi Nakai, M.D,'s credentials? ▼
Hitomi Nakai, M.D,'s NPI is 1205031283 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.
- 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.