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Dentist | Dr. Cheng-Hsin Chang and Dr. Joseph Mullin | USC Dental School Graduates | Walnut Creek | Lafayette|Orinda | Pleasant Hill |Alamo | Danville | Meet the Doctors


The husband and wife team, Dr. Joseph Mullin and Dr. Cheng-Hsin Chang, graduates of the University of Southern California Dental School, have been practicing in Walnut Creek for over 20 years.  Their office is conveniently located in downtown Walnut Creek near the 680/24 interchange.

For the sixth year in a row, the Doctors have been awarded the Talk of the Town's highest honor, 5 Star Category for Dentists reflecting excellence in patient satisfaction.  In addition, Yelp has rated our office among the top ten dental offices in Walnut Creek.

A graduate of Oakland's Skyline High School, Dr. Chang received her undergraduate degree in Anthropology from the University of California, Berkeley. In addition, she received a master's degree in Speech Pathology from the University of Montana.  Upon graduation from USC she received the school's Dental Ambassador Award for service as staff of USC Mobile Dental Clinic. 

A graduate of Los Angeles' Loyola High School, Dr. Mullin received his undergraduate degree in Biology from the University of Southern California.  

As members of the American Dental Society, the California Dental Society, and the Contra Costa Dental Society the Doctors are committed to postgraduate education via lectures, seminars, and advanced certifications.  The Doctors are also active members of the Round Hill Implant Study Club, International Team for Implantology, and Walnut Creek Invisalign Study Club.

The Doctors are among the few in the United States, who are certified to provide the Bioclear Method of conservatively closing black triangles (dark spaces between the teeth) seen in over 30% of adults.