Ronald U. Vallejo, M.D.
Emergency Medicine Physician · Corvallis, OR
Ronald U. Vallejo, M.D. is an emergency medicine physician with a practice address in Corvallis, Oregon, and NPI 1255381422, issued on May 11, 2006. Check the license (Oregon MD25582, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ronald U. Vallejo
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD25582 OR
Self-reported in NPPES; status is on the state search - Practice location
- 3680 NW Samaritan Dr, Corvallis, OR 97330
- Phone
- (541) 754-1150
- Enumerated
- May 11, 2006
- Record last updated
- Jun 5, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 022885 OR
- Medicare enrollment
- Enrolled (PECOS I20050111000378); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,079 in Oregon → Look up another NPI →
Also registered at 3680 NW Samaritan Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lindsay Alaishuski, M.D.Family Medicine Physician1083811954
- Michael Allender, MDPediatrics Physician1679522692
- Brian Andrew, PA-CPhysician Assistant1891276630
- Marina Arbuck, M.D.Internal Medicine Physician1992894851
- Steven Athay, M.D.Internal Medicine Physician1477502375
- Daniel Barrett, M.D.Family Medicine Physician1386694776
Verify Ronald U. Vallejo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD25582Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% more Medicare Part D claims than the average emergency medicine physician in 2024
420 Medicare Part D claims for 315 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass44 claims
- Prednisone40 claims
- Azithromycin33 claims
- Cephalexin32 claims
- Doxycycline Monohydrate31 claims
- Nitrofurantoin Mono-Macro23 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
- Portland ClinicPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald U. Vallejo among 1,079 emergency medicine physician records in Oregon
Ronald U. Vallejo, M.D. is one of 1,079 emergency medicine physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1988 · median 2013 among the 557 with a school on file
- Record last updated2009 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Oregon
There are 1,079 emergency medicine physician records in Oregon.
All 1,079 in Oregon → Every provider in Corvallis → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Stephen Crandall, MDCorvallis, OR 973301497704332
- Brian Delmonaco, MDCorvallis, OR 973301245338185
- Alan Goldner, M.D.Corvallis, OR 973301942214838
- Paul Hochfeld, M.D.Corvallis, OR 973301659397719
- Brett Johnson, MDCorvallis, OR 973301598842650
- Gabriel Ledger, M.D.Corvallis, OR 973301588690564
- Charles Parker, MDCorvallis, OR 973301710949987
- William Reeves, M.D.Corvallis, OR 973301538101464
Common questions
What is Ronald U. Vallejo, M.D.'s NPI number?
Ronald U. Vallejo, M.D.'s National Provider Identifier (NPI) is 1255381422, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald U. Vallejo, M.D. located?
The NPPES record lists a practice address at 3680 NW Samaritan Dr, Corvallis, OR, 97330. Phone: (541) 754-1150. Providers update this record themselves, so call before visiting.
How can I verify Ronald U. Vallejo, M.D.'s license?
NPPES lists Oregon license number MD25582, 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 Ronald U. Vallejo, M.D. prescribe under Medicare Part D?
In 2024, Ronald U. Vallejo, M.D. had 420 Medicare Part D claims for 315 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.