Thejana K. Marasinghe, M.D.
General Practice Physician · Seattle, WA
Thejana K. Marasinghe, M.D. is a general practice physician with a practice address in Seattle, Washington, and NPI 1184777534, issued on Jan 19, 2007. Check the license (Washington ML20008538, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Thejana K. Marasinghe
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- ML20008538 WA
Self-reported in NPPES; status is on the state search - Practice location
- 310 15TH Ave E, Seattle, WA 98112
- Phone
- (206) 326-3000
- Enumerated
- Jan 19, 2007
- Record last updated
- Jun 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100112000863); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 388 in Washington → Look up another NPI →
Also registered at 310 15TH Ave E
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jo Anderson, RPHPharmacist1063612083
- Brenda Augustavo, PHPharmacist1790814531
- Daniel Avery, MD MPHUrology Physician1215192463
- Brandon Bartels, A.R.N.P.Adult Health Nurse Practitioner1467518076
- Anamika Bennett, L.D.Audiologist-Hearing Aid Fitter1891918124
- Barbara Berry, P.T.Physical Therapist1831249473
Verify Thejana K. Marasinghe in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license ML20008538Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average general practice physician in 2024
3,353 Medicare Part D claims for 315 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 75 claims were for opioids.
Most prescribed
- Atorvastatin Calcium291 claims
- Levothyroxine Sodium130 claims
- Lisinopril121 claims
- Amlodipine Besylate115 claims
- Losartan Potassium106 claims
- Metformin Hcl Er102 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Providence Health And Services- WashingtonEverett, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thejana K. Marasinghe among 388 general practice physician records in Washington
Thejana K. Marasinghe, M.D. is one of 388 general practice physician records with a practice address in Washington. 28% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 21% of them.
- NPI issued2007 · 21% of these records are older, 67% newer
- In a Medicare fileYes · 28% of these records are
- In the CMS Doctors and Clinicians fileYes · 11% of these records are
- Graduated2002 · median 2002 among the 43 with a school on file
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Washington
There are 388 general practice physician records in Washington.
All 388 in Washington → Every provider in Seattle → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Lisa Dropp, M.D.Bainbridge Island, WA 981101689834905
- Frank Aversano, N.D.Seattle, WA 981091699958926
- David Hagin, M.D.Seattle, WA 981091790031573
- Anne Lawrence, M.D., PH.D.Seattle, WA 981151568520856
- Joshua Lieberman, MDSeattle, WA 981151033181771
- Carlos Chavez, ARNPSeattle, WA 981081477274496
- Quan Le, MDSeattle, WA 981181144336397
- Dennis Nguyen, MDSeattle, WA 981181952185209
Common questions
What is Thejana K. Marasinghe, M.D.'s NPI number?
Thejana K. Marasinghe, M.D.'s National Provider Identifier (NPI) is 1184777534, issued on Jan 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Thejana K. Marasinghe, M.D. located?
The NPPES record lists a practice address at 310 15TH Ave E, Seattle, WA, 98112. Phone: (206) 326-3000. Providers update this record themselves, so call before visiting.
How can I verify Thejana K. Marasinghe, M.D.'s license?
NPPES lists Washington license number ML20008538, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thejana K. Marasinghe, M.D. prescribe under Medicare Part D?
In 2024, Thejana K. Marasinghe, M.D. had 3,353 Medicare Part D claims for 315 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.