Internal Medicine


Dr. Craig Maretzki

Diplomate, American College of Veterinary Internal Medicine

     Dr. Maretzki grew up in Honolulu. He went to college at University of Wisconsin, Madison and Penn State before matriculating at University of Pennsylvania for veterinary school, graduating in 1990. After veterinary school Dr. Maretzki completed a small animal internship at the University of Georgia, an internal medicine residency at the University of California, Davis and post-doctoral research at Yale University as a NIH training grant recipient. In 1995 he became a Diplomate in the American College Veterinary Internal Medicine (ACVIM).  In 1997 Dr. Maretzki returned to Northern California as a clinical consultant for a national veterinary reference laboratory.  In 1999 he joined a nascent group of veterinary specialists in San Francisco which evolved over time to become the largest multi-specialty practice in the city.  Dr. Maretzki remained with San Francisco Veterinary Specialists until 2020.

     As a veterinary internist, Dr. Maretzki has extensive expertise and experience in non-invasive and minimally invasive diagnostics including ultrasound imaging and endoscopy. His practice entails diagnostics and treatment of complex internal medicine cases from the acute, critical/hospitalized period to the chronic and ongoing stages. 

    The Maretzki family lives in the North Bay and consists of a veterinarian at Guide Dogs for the Blind, a teen-aged boy gymnast, 1 small dog, 1 large (polydactyl) cat and 1 (extroverted) Jenday Conure.