Brian Larsen, M.D.
NPI 1366768533 · Internal Medicine Physician · Hermiston, OR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Larsen, M.D. is a Internal Medicine Physician provider in Hermiston, OR (NPI 1366768533).
Provider details
- NPI number
- 1366768533
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD165374 (OR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
16 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 126 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 280 | 92 |
| Atorvastatin Calcium | 231 | 83 |
| Amlodipine Besylate | 226 | 75 |
| Omeprazole | 214 | 70 |
| Losartan Potassium | 206 | 64 |
| Lisinopril | 185 | 57 |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$69 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-04-13
- Last updated
- 2025-03-27
- Certified
- 2025-03-27
Frequently asked questions
- What is Brian Larsen's NPI number?
- Brian Larsen's National Provider Identifier (NPI) is 1366768533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Larsen's specialty?
- Brian Larsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Larsen located?
- Brian Larsen's practice location on file with NPPES is 620 Nw 11th St Ste M103, Hermiston, OR 97838-6941.
- What is Brian Larsen's phone number?
- The practice phone number listed in the NPPES registry for Brian Larsen is (541) 567-5305.
- Does Brian Larsen accept Medicare?
- Brian Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Larsen's NPI active?
- Yes — Brian Larsen's NPI (1366768533) is active in the NPPES registry as of the last update on 2025-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.