Expert profile

Dr. Richard Horowitz

Physician specializing in tick-borne and chronic illness

Lyme • tick-borne and stealth infections • chronic illness

1Discussion
78 minAnalysed
Last reviewed: Aug 10, 2026·Credential: MD; author on Lyme and chronic illness·First indexed: Aug 10, 2026

About the expert

Focus: Stealth infections and inflammation as drivers of chronic illness

Board-certified internist known for treating Lyme and other chronic tick-borne illnesses, using a 16-point 'MSIDS' model to look for infections, inflammation, toxins, and other drivers behind chronic symptoms.

Expert discussions with Dr. Richard Horowitz

Can hidden infections be behind chronic illness?
Two functional-medicine physicians, Dr. Richard Horowitz and Dr. Mark Hyman, argue that hidden or 'stealth' infections like Lyme and Bartonella, together with mould exposure, heavy metals, and inflammation, drive chronic illness that standard care misses. They use a 16-point checklist to hunt for these drivers behind fatigue, pain, and other long-term symptoms. There is a real, important core: some infections can be difficult to diagnose and are occasionally overlooked, and patients are sometimes dismissed. But the broad framework goes well beyond the evidence, including a specific drug combination said to clear persistent infections and even reverse Alzheimer's markers. These are contested claims, and this kind of diagnosis and treatment should be handled by specialists.