Write a review Your name* Your e-mail* (Not for publication) Rating ★★★★★ Excellent ★★★★☆ Very good ★★★☆☆ Average ★★☆☆☆ Poor ★☆☆☆☆ Terrible Your review * * — Required information Dr. John S Zimmerman - Diamond Bar ← View details 566 N Diamond Bar Blvd, California, Diamond Bar, 91765, Diamond Bar, California 91765 9098612611