Dr Melissa S Defreest, MD - Medicare Emergency Medicine in Eugene, OR

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Dr Melissa S Defreest, MD is a medicare enrolled "Emergency Medicine" physician in Eugene, Oregon. She went to Oregon Health Sciences University School Of Medicine and graduated in 2003 and has 22 years of diverse experience with area of expertise as Emergency Medicine. She is a member of the group practice Peacehealth Medical Group, Peacehealth Medical Group Cottage Grove and her current practice location is 600 Country Club Rd Ste 100, Eugene, Oregon. You can reach out to her office (for appointments etc.) via phone at (541) 463-2390.

Dr Melissa S Defreest is licensed to practice in Oregon (license number MD41141) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1407960388.

Contact Information

Dr Melissa S Defreest, MD
600 Country Club Rd Ste 100,
Eugene, OR 97401-2240
(541) 463-2390
(541) 463-2889

Map and Direction




Physician's Profile

Full NameDr Melissa S Defreest
GenderFemale
SpecialityEmergency Medicine
Experience22 Years
Location600 Country Club Rd Ste 100, Eugene, Oregon
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Melissa S Defreest attended and graduated from Oregon Health Sciences University School Of Medicine in 2003
  NPI Data:
  • NPI Number: 1407960388
  • Provider Enumeration Date: 08/18/2006
  • Last Update Date: 09/20/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 1850398884
  • Enrollment ID: I20061103000280

Medical Identifiers

Medical identifiers for Dr Melissa S Defreest such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1407960388NPI-NPPES
I62501OtherPROVIDENCE
215628OtherWASHINGTON L&I
I62501OtherGROUP HEALTH
XPY206324MedicaidCA
057221021OtherBCBS
278470MedicaidOR
I62501OtherLIPA
8465049MedicaidWA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine MD41141 (Oregon)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Peacehealth Medical Group9032023270247
Peacehealth Medical Group Cottage Grove94360605308

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Melissa S Defreest allows following entities to bill medicare on her behalf.
Entity NamePeacehealth
Entity TypePart A Provider - Critical Access Hospital
Entity IdentifiersNPI Number: 1902892391
PECOS PAC ID: 1254242357
Enrollment ID: O20030922000023
Entity NamePeacehealth Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1447207287
PECOS PAC ID: 9032023270
Enrollment ID: O20031113000097
Entity NameEugene Emergency Physicians Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831133677
PECOS PAC ID: 2264330448
Enrollment ID: O20031226000011
Entity NameSalem Health
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265431829
PECOS PAC ID: 8628986668
Enrollment ID: O20040309001131
Entity NamePeacehealth
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902892391
PECOS PAC ID: 1254242357
Enrollment ID: O20040513000725
Entity NamePeacehealth Medical Group Cottage Grove
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1780631267
PECOS PAC ID: 9436060530
Enrollment ID: O20040616001333

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Melissa S Defreest is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Melissa S Defreest, MD
Po Box 1648,
Eugene, OR 97440-1648

Ph: () -		Dr Melissa S Defreest, MD
600 Country Club Rd Ste 100,
Eugene, OR 97401-2240

Ph: (541) 463-2390

Reviews and Comments


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Phone: 616-881-9555    Fax: 616-881-9555
Dr. Tod Hayes, M.D.
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Practice Location: 1255 Hilyard St, Eugene, OR 97401
Phone: 503-686-7300    

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Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

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