DAVID PEIZNER, M.D.
Functional Medicine MDs
Holistic approach to addressing chronic conditions through personalized treatment plans.
Credentials & Training
Federally verified- Credential
- MD
- Medical school
- Saint Louis University School of Medicine
- Graduated
- 1987
- Medicare specialty
- Cardiovascular Disease (cardiology)
- Also practices
- Interventional Cardiology
- Group practice
- Legacy Clinics LLC · 718 clinicians
- Medicare assignment
- Accepted — bills the Medicare-approved amount as payment in full
Sourced from the CMS Doctors & Clinicians national file, last checked August 2026.
About
Dr. Peizner specializes in treating patients with chronic illnesses, such as fibromyalgia and Hashimoto's thyroiditis. He focuses on the interplay between environmental toxins, genetics, and diet to create a tailored treatment plan for each patient. His approach emphasizes preventing and reversing disease, rather than just managing symptoms.
His functional medicine practice is located in Portland, Oregon, and offers cash-based services, as he does not accept insurance. Patients can schedule in-office appointments or use his services on a self-pay basis.
Areas of Focus
Specialties
Patients Served
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