Dr. Zhang Martha Yan is a California state licensed medical doctor, specializing in Pediatric Dentistry. Graduated Magna Cum Laude from Shanghai Jiaotong Univ. Sch of Med, Dr. Yan currently is working at Jades Dentistry, located in 23440 Hawthorne Blvd Torrance CA 90505 Please call +1-310-373-8520 to contact. | |||