Bernard Karnath is an Internal Medicine doctor in Galveston, Texas. Dr. Karnath is highly rated in 4 conditions, according to our data. His top areas of expertise are Maturity Onset Diabetes of the Young, Hypertension, Glucocorticoid-Remediable Aldosteronism, Endoscopy, and Colonoscopy. Dr. Karnath is currently accepting new patients.