Magha Sirimevan Dissanayake, MD
Internal Medicine Physician · Springfield, OR
Magha Sirimevan Dissanayake, MD is an internal medicine physician with a practice address in Springfield, Oregon, and NPI 1578545182, issued on Nov 18, 2005. Check the license (Oregon MD21258, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Magha Sirimevan Dissanayake
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD21258 OR
Self-reported in NPPES; status is on the state search - Practice location
- 147 S 52ND PL, Springfield, OR 97478
- Phone
- (541) 746-1166
- Enumerated
- Nov 18, 2005
- Record last updated
- Dec 27, 2022
- Fax
- (541) 393-1607
- Medicaid ID
- 151267 OR
- Medicare enrollment
- Enrolled (PECOS I20050927001524); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 147 S 52ND PL
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephan Ames, MDFamily Medicine Physician1437109154
- Steven Butdorf, MDFamily Medicine Physician1386696995
- Mallory Crownover, NPNurse Practitioner1700390721
- Claire Exum, PAPhysician Assistant1053952648
- Tanya Fresquez, FNP-CPrimary Care Nurse Practitioner1841935848
- Kathleen Jackson, M.D.Internal Medicine Physician1548236029
Verify Magha Sirimevan Dissanayake in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD21258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
8,011 Medicare Part D claims for 671 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 481 claims were for opioids.
Most prescribed
- Atorvastatin Calcium425 claims
- Levothyroxine Sodium347 claims
- Gabapentin255 claims
- Meloxicam246 claims
- Lisinopril237 claims
- Omeprazole187 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.
Industry payments in 2024: $988.08
53 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Praxis Health PCSpringfield, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Magha Sirimevan Dissanayake among 2,116 internal medicine physician records in Oregon
Magha Sirimevan Dissanayake, MD is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1986 · median 2008 among the 1,232 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
35 internal medicine physician records list a practice address in Springfield
They are 35 of the 2,209 NPPES records with a practice address in Springfield, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Springfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kathleen Jackson, M.D.Springfield, OR 974781548236029
- Graeme Marquez, MBBSSpringfield, OR 974781245801588
- Joanna Marie Aquino-Laban, M.D.Springfield, OR 974771336435536
- Kevin Brown, M.D.Springfield, OR 974771558757922
- Marion DiermayerSpringfield, OR 974771548777170
- Brian Fields, D.O.Springfield, OR 974771245541580
- Peter Fox, DOSpringfield, OR 974771326435504
- Swati Gobhil, M.D.Springfield, OR 974771679952105
Common questions
What is Magha Sirimevan Dissanayake, MD's NPI number?
Magha Sirimevan Dissanayake, MD's National Provider Identifier (NPI) is 1578545182, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Magha Sirimevan Dissanayake, MD located?
The NPPES record lists a practice address at 147 S 52ND PL, Springfield, OR, 97478. Phone: (541) 746-1166. Providers update this record themselves, so call before visiting.
How can I verify Magha Sirimevan Dissanayake, MD's license?
NPPES lists Oregon license number MD21258, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Magha Sirimevan Dissanayake, MD prescribe under Medicare Part D?
In 2024, Magha Sirimevan Dissanayake, MD had 8,011 Medicare Part D claims for 671 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.