Brian Timothy Larsen, M.D.
Internal Medicine Physician · Hermiston, OR
Brian Timothy Larsen, M.D. is an internal medicine physician with a practice address in Hermiston, Oregon, and NPI 1366768533, issued on Apr 13, 2010. Check the license (Oregon MD165374, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Brian Timothy Larsen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD165374 OR
Self-reported in NPPES; status is on the state search - Practice location
- 620 NW 11TH St Ste M103, Hermiston, OR 97838
- Phone
- (541) 567-5305
- Enumerated
- Apr 13, 2010
- Record last updated
- Jun 10, 2026
- Fax
- (541) 303-8767
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 620 NW 11TH St Ste M103
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barbara Atwood, MD LLCInternal Medicine Physician1396852760
- David Shanley, MDFamily Medicine Physician1154374965
- Nu Nwe Tun, MDGeriatric Medicine (Internal Medicine) Physician1942685466
- Bradley Tymchuk, M.D.Internal Medicine Physician1437503380
Verify Brian Timothy Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD165374Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
6,978 Medicare Part D claims for 571 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 512 claims were for opioids.
Most prescribed
- Levothyroxine Sodium280 claims
- Atorvastatin Calcium231 claims
- Amlodipine Besylate226 claims
- Omeprazole214 claims
- Losartan Potassium206 claims
- Lisinopril185 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $68.95
3 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. 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.
Brian Timothy Larsen among 2,116 internal medicine physician records in Oregon
Brian Timothy Larsen, M.D. 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 2010, is newer than 62% of them.
- NPI issued2010 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2026 · 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).
6 internal medicine physician records list a practice address in Hermiston
They are 6 of the 479 NPPES records with a practice address in Hermiston, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Hermiston → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Barbara Atwood, MD LLCHermiston, OR 978381396852760
- Benjamin Booher, DOHermiston, OR 978381740245562
- Edward Ricketts, MDHermiston, OR 978381215079710
- David Stenstrom, MDHermiston, OR 978381265607485
- Bradley Tymchuk, M.D.Hermiston, OR 978381437503380
- Scott Siebe, MDEnterprise, OR 978281568455822
- Stephen Bump, M.D.La Grande, OR 978501497785042
- Stanley Graham, M.D.La Grande, OR 978501952330557
Common questions
What is Brian Timothy Larsen, M.D.'s NPI number?
Brian Timothy Larsen, M.D.'s National Provider Identifier (NPI) is 1366768533, issued on Apr 13, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Brian Timothy Larsen, M.D. located?
The NPPES record lists a practice address at 620 NW 11TH St Ste M103, Hermiston, OR, 97838. Phone: (541) 567-5305. Providers update this record themselves, so call before visiting.
How can I verify Brian Timothy Larsen, M.D.'s license?
NPPES lists Oregon license number MD165374, 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 Brian Timothy Larsen, M.D. prescribe under Medicare Part D?
In 2024, Brian Timothy Larsen, M.D. had 6,978 Medicare Part D claims for 571 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Brian Timothy Larsen, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.