I was referred to Dr. Guzman through my Dermatologist, Dr. Diacon(reviewed). I saw him within a week of contacting him for chronic pain on the top of my foot, near the ankle(unusual). .Yay! finally, I found an astute foot specialist who captured what I’d been suffering for the past year. He immediately diagnosed it as tendonitis. He referred me to Eric Ewig, Physical Therapy(will review them as well(also 5 Stars) I’ll mention that a few months earlier, I saw another Napa Podiatrist(–1) a few months earlier(which I will review later). Referrals can be the best. Worst case scenario, you never need to see them again, but in this case, Dr. David Guzman gets my 5STARS!