Melissa S. Defreest, MD
Emergency Medicine Physician · Eugene, OR
Melissa S. Defreest, MD is an emergency medicine physician with a practice address in Eugene, Oregon, and NPI 1407960388, issued on Aug 18, 2006. Check the license (Oregon MD41141, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Melissa S. Defreest
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- MD41141 OR
Self-reported in NPPES; status is on the state search - Practice location
- 600 Country Club RD Ste 100, Eugene, OR 97401
- Phone
- (541) 463-2390
- Enumerated
- Aug 18, 2006
- Record last updated
- May 7, 2026
- Fax
- (541) 463-2889
- Medicaid IDs
- XPY206324 CA
278470 OR
8465049 WA - Medicare enrollment
- Enrolled (PECOS I20061103000280); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 2003
- Entity
- Type 1 · individual
Also registered at 600 Country Club RD Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Peter Arellano, MDFamily Medicine Physician1295814325
- Nathaniel Collins, PA CMedical Physician Assistant1023483419
- Jennifer Fisher, PA-CPhysician Assistant1295138444
- Leigh Gatons, PAPhysician Assistant1548994213
- Felix Achille Gouanette Tankeu, DNP, FNP- BCFamily Nurse Practitioner1437799871
- Jessica HayesFamily Nurse Practitioner1255115564
Verify Melissa S. Defreest in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD41141Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average emergency medicine physician in 2024
140 Medicare Part D claims for 93 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
- Cephalexin20 claims
- Hydrocodone-Acetaminophen17 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 2 group practices
- Oregon Healthcare Resources LLCSpringfield, OR
- Peacehealth Medical GroupEugene, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Emergency Medicine Physician providers in Oregon
There are 1,079 emergency medicine physician records in Oregon.
Other emergency medicine physician records in Oregon
- Richard Abraham, MDEugene, OR1457396442
- Andrew Adamski, MDRedmond, OR1306874011
- Ulrika Agnew, MDPortland, OR1598296394
- Anna Akita, M.D.Medford, OR1942521372
- Darren Alexander, MDPortland, OR1487678256
- Kevin Allan, M.D.Springfield, OR1023549466
- Nina Allan, MDAlbany, OR1184899221
- McKaila Allcorn, DOLincoln City, OR1700197076
- Christopher Allen, MDOregon City, OR1467915843
- Jacoby Allen, D.O.Redmond, OR1396068748
Common questions
What is Melissa S. Defreest, MD's NPI number?
Melissa S. Defreest, MD's National Provider Identifier (NPI) is 1407960388, issued on Aug 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Melissa S. Defreest, MD located?
The NPPES record lists a practice address at 600 Country Club RD Ste 100, Eugene, OR, 97401. Phone: (541) 463-2390. Providers update this record themselves, so call before visiting.
How can I verify Melissa S. Defreest, MD's license?
NPPES lists Oregon license number MD41141, 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 Melissa S. Defreest, MD prescribe under Medicare Part D?
In 2024, Melissa S. Defreest, MD had 140 Medicare Part D claims for 93 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.