NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1588892459 MD
Verify on CMS → Tritia Yamasaki, MD
Neurology Physician in Lexington, Kentucky.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 19,866 in Neurology 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
1K
Medicare Part D claims · 134 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 17 pts above national avg 83.1 · Exceptional
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
Tritia Yamasaki, MD reported a CMS MIPS final score of 100/100 - above the 83.1 national average - and filed 1,021 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +17 vs avg
- 1K
- Part D claims, 2023
- 88%
- 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.
Tritia Yamasaki, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
100 Top 7% higher than 93% 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 Tritia Yamasaki, MD sits
This provider among neurology physician peers
Across the 5,437 neurology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Tritia Yamasaki, MD writes more Part D claims than 49% of them and scores higher on MIPS quality than 92% - placing this provider in the lower-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 neurology physician peer from a representative sample of 60; the gold marker is Tritia Yamasaki, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Tritia Yamasaki, MD 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 Tritia Yamasaki, MD?
High performer (top quartile)Primary specialty
Neurology Physician
Medicare Part D claims
1,021 22% vs specialty avg
MIPS final score
100/100 16.9 pts vs avg
Specialty distribution in Kentucky
How Neurology Physician compares to other specialties among Kentucky providers
Medicare quality performance, MIPS
Tritia Yamasaki, MD's 2023 MIPS final score plotted against the Neurology Physician national average
- MIPS Final Score
- 100/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Neurology Physician) - 100/100 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).
Tritia Yamasaki, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 740 S LIMESTONE, Lexington, KY, 40536, with a listed phone of (859) 323-5661. NPI 1588892459 was issued on 06/30/2009.
Medicare Part D records for calendar year 2023 show 1,021 prescription claims written by this provider, covering 134 Medicare beneficiaries and totaling roughly $408K in drug spend, split 12% brand-name and 88% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 100/100 for the 2023 performance year, compared with the national average of 83.1.
Neurology Physician is a mid-sized specialty nationwide, with 19,866 enrolled providers across 54 states and an average of 1,309 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 | 1588892459 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/30/2009 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
100
Final Score
Avg: 83.1
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Tritia Yamasaki, MD 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.
Kentucky Medical Services Foundation, Inc
Lexington, KY
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 · Typical
Tritia Yamasaki, MD - brand share 12.0%
Neurology Physician average
12% brand-name claims vs 88% generic, on 1,021 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.
1,021
Total Claims
$408K
Total Drug Cost
134
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,802
- Total Day Supply
- 53,583
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $305K
- Generic Drug Cost
- $103K
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.68
- Gender Split
- 51% female / 49% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Tritia Yamasaki, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Carbidopa-Levodopa
Carbidopa-Levodopa
302 claims
- Primidone 60
Primidone
60 claims
- Memantine Hcl 48
Memantine Hcl
48 claims
- Pramipexole Dihydr… 46
Pramipexole Dihydrochloride
46 claims
- Nuplazid 39
Nuplazid
39 claims
- Rytary 39
Rytary
39 claims
- Trihexyphenidyl Hcl 31
Trihexyphenidyl Hcl
31 claims
- Carbidopa-Levodopa… 30
Carbidopa-Levodopa Er
30 claims
| Drug | Claims |
|---|---|
| Carbidopa-Levodopa Carbidopa/Levodopa | 302 |
| Primidone | 60 |
| Memantine Hcl | 48 |
| Pramipexole Dihydrochloride Pramipexole Di-Hcl | 46 |
| Nuplazid Pimavanserin Tartrate | 39 |
| Rytary Carbidopa/Levodopa | 39 |
| Trihexyphenidyl Hcl | 31 |
| Carbidopa-Levodopa Er Carbidopa/Levodopa | 30 |
| Clonazepam | 28 |
| Topiramate | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Tritia Yamasaki, MD fits within the Neurology Physician landscape nationally.
19,866
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Tritia Yamasaki, MD's 1,021 claims are below the specialty average of 1,309.
Nearby Neurology Physician Providers in Kentucky
Other clinicians with the same primary specialty enrolled in Kentucky, drawn from the same CMS NPPES roster as Yamasaki.
Dr. Tapan Abrol
MD
Louisville, KY
Dr. Arden Acob
MD
Corbin, KY
Dr. Ausaf Ahmed
MBBS
Somerset, KY
Dr. Naveed Ahmed
M.D
Pikeville, KY
Dr. Fatai Akemokwe
MD
Lexington, KY
Compare Neurology 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 Kentucky medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Neurology 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 Tritia Yamasaki, MD's specialty? ▼
Tritia Yamasaki, MD specializes in Neurology Physician and practices in Lexington, Kentucky. Credentials: MD.
How much does Tritia Yamasaki, MD prescribe under Medicare Part D? ▼
In 2023, Tritia Yamasaki, MD wrote 1,021 Medicare Part D claims totaling $408K in drug costs for 134 beneficiaries.
What is Tritia Yamasaki, MD's Medicare quality score? ▼
Tritia Yamasaki, MD has a CMS MIPS Final Score of 100/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Tritia Yamasaki, MD located? ▼
Tritia Yamasaki, MD is located at 740 S LIMESTONE, Lexington, KY, 40536. Phone: (859) 323-5661.
What is Tritia Yamasaki, MD's NPI number? ▼
Tritia Yamasaki, MD's National Provider Identifier (NPI) is 1588892459, issued on 06/30/2009.
Does Tritia Yamasaki, MD prescribe more brand-name or generic drugs? ▼
Tritia Yamasaki, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $305K in brand drug costs.
How many Neurology Physician providers are there in the US? ▼
There are 19,866 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Tritia Yamasaki, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Tritia Yamasaki, MD's most frequently prescribed drugs include Carbidopa-Levodopa, Primidone, Memantine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tritia Yamasaki, MD accept Medicare? ▼
Tritia Yamasaki, MD appears in CMS Medicare data with 1,021 Part D claims and 134 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tritia Yamasaki, MD's credentials? ▼
Tritia Yamasaki, MD's NPI is 1588892459 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
Compiled from official public sources by the PlainDoctor editorial team.