About David Wiss
David Wiss is a nutrition and mental-health professional whose work focuses on the relationship between nutrition, physical health, and psychological well-being. He holds a PhD in Community Health Sciences from UCLA and is a Registered Dietitian Nutritionist (RDN). His approach combines functional medicine assessment, nutrition, and mental-health research to explore factors that may contribute to persistent mental-health symptoms.
Highlights
- Focus on complex and treatment-resistant mental-health presentations
- Functional medicine testing and personalized care plans
- Nutrition and health psychology included in the collaborative approach
- Free 15-minute discovery call
- Remote consultations and at-home testing options
- Optional ongoing membership after the initial assessment
Services & expertise
Functional Medicine Mental Health Nutrition Nutritional Psychiatry Health Psychology Collaboration Functional Laboratory Testing Lifestyle Medicine Eating Disorder Support Addiction Recovery Cognitive Health Adrenal thyroid & pituitary health Bone skin & muscle health Cardiovascular health Chronic fatigue & chronic pain Dementia & cognitive decline Diabetes & metabolic syndrome Food sensitivities intolerances & allergies Gut & microbiome health Immune health & autoimmunity Mental health Nutrition health & wellness Toxins & detoxification Women’s & men’s hormonal health.
Frequently asked questions
Does the practice accept insurance?
The practice says it operates outside insurance. It can provide superbills for possible out-of-network reimbursement, and some services may qualify for HSA/FSA payment. Check with your insurer and the practice before enrolling.
Can appointments be done remotely?
Yes. The practice says consultations are conducted by secure video and that testing can be completed using at-home kits and local blood-draw services.
Is ongoing support included?
The practice describes ongoing membership as optional, with monthly sessions and continued nutrition and protocol support. Its current membership price was not confirmed.
Practice
FxMed Mental Health is a collaborative functional medicine group practice in Los Angeles. Its approach combines functional medicine testing, nutrition, and health psychology to assess complex or treatment-resistant mental-health concerns. The team includes David Wiss and health psychologist Gretchen Kubacky, PsyD. The practice describes its process as a comprehensive assessment followed by a personalized nutrition, supplement, and lifestyle roadmap.
Not accepting online bookings yet
David Wiss is listed in the Functional Health Network directory but hasn’t opened online
scheduling. Check back, or browse practitioners who are accepting visits.
Browse bookable practitioners
