NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1740329648 M.D.
Verify on CMS → Thanuja Liyanarachchi, M.D.
Family Medicine Physician in Seattle, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family 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
352
Medicare Part D claims · 215 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
70%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Thanuja Liyanarachchi, M.D. filed 352 Medicare Part D claims in 2023 as a Family Medicine Physician in Seattle, Washington, prescribing 70% generic.
- 352
- Part D claims, 2023
- 70%
- generic prescribing
- ≥57th
- pct by Part D claim volume (lower-bound band)
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.
CMS NPPES provider registry desk
NPI 1740329648 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1740329648
- ENUM-MID 2007
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 352
- BOOK-MID 5,197 in Washington
- PHOTO-ENUM Troy Watson · 2007
Thanuja Liyanarachchi, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
352 ≥ 57th percentile 57% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Thanuja Liyanarachchi, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Thanuja Liyanarachchi, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
352 90% vs specialty avg
Specialty distribution in Washington
How Family Medicine Physician compares to other specialties among Washington 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 Family 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).
Practice Address
Provider Details
| NPI | 1740329648 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 02/06/2007 |
License & disciplinary context - Washington WMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 - they are NOT specific to Thanuja Liyanarachchi, M.D.. To verify Thanuja Liyanarachchi, M.D.'s current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Thanuja Liyanarachchi, M.D. - brand share 17.0%
Family Medicine Physician average
17% brand-name claims vs 70% generic, on 352 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.
352
Total Claims
$11K
Total Drug Cost
215
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 536
- Total Day Supply
- 12,698
- Brand vs Generic
- 17% brand / 70% generic
- Brand Drug Cost
- $5K
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 35
Patient Demographics
- Average Patient Age
- 73.6 years
- Avg HCC Risk Score
- 0.89
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thanuja Liyanarachchi, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Paxlovid (Eua)
Paxlovid (Eua)
48 claims
- Alvesco
Alvesco
27 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
20 claims
- Losartan Potassium 19
Losartan Potassium
19 claims
- Albuterol Sulfate … 17
Albuterol Sulfate Hfa
17 claims
- Estradiol 17
Estradiol
17 claims
- Cefuroxime 16
Cefuroxime
16 claims
- Fluticasone Propio… 16
Fluticasone Propionate
16 claims
| Drug | Claims |
|---|---|
| Paxlovid (Eua) Nirmatrelvir/Ritonavir | 48 |
| Alvesco Ciclesonide | 27 |
| Triamcinolone Acetonide | 20 |
| Losartan Potassium | 19 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 17 |
| Estradiol | 17 |
| Cefuroxime Cefuroxime Axetil | 16 |
| Fluticasone Propionate | 16 |
| Prednisone | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Thanuja Liyanarachchi, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Thanuja Liyanarachchi, M.D.'s 352 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Liyanarachchi, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Liyanarachchi.
One of 5,197 Family Medicine Physician providers enrolled in Washington, 5 are shown here.
Dr. Shawn Aaron
MD
Longview, WA
Dr. John Abano
M.D.
Shoreline, WA
Dr. Sarah Abbot
DO
Kirkland, WA
Dr. Arthur Abbott
M.D.
Seattle, WA
Dr. Dale Abbott
MD
Burlington, WA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Thanuja Liyanarachchi, M.D.'s specialty? ▼
Thanuja Liyanarachchi, M.D. specializes in Family Medicine Physician and practices in Seattle, Washington. Credentials: M.D..
How much does Thanuja Liyanarachchi, M.D. prescribe under Medicare Part D? ▼
In 2023, Thanuja Liyanarachchi, M.D. wrote 352 Medicare Part D claims totaling $11K in drug costs for 215 beneficiaries.
Where is Thanuja Liyanarachchi, M.D. located? ▼
Thanuja Liyanarachchi, M.D. is located at 1420 5TH AVE STE 375, Seattle, WA, 98101. Phone: (206) 223-2611.
What is Thanuja Liyanarachchi, M.D.'s NPI number? ▼
Thanuja Liyanarachchi, M.D.'s National Provider Identifier (NPI) is 1740329648, issued on 02/06/2007.
Does Thanuja Liyanarachchi, M.D. prescribe more brand-name or generic drugs? ▼
Thanuja Liyanarachchi, M.D.'s prescribing is 17% brand-name and 70% generic drugs by claim count, with $5K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Thanuja Liyanarachchi, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Thanuja Liyanarachchi, M.D.'s most frequently prescribed drugs include Paxlovid (Eua), Alvesco, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thanuja Liyanarachchi, M.D. accept Medicare? ▼
Thanuja Liyanarachchi, M.D. appears in CMS Medicare data with 352 Part D claims and 215 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thanuja Liyanarachchi, M.D.'s credentials? ▼
Thanuja Liyanarachchi, M.D.'s NPI is 1740329648 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.