Diamond Bar Psychological is a collection of Independent Therapists who each owns and operates their Individual Practice. We are working together to provide a wider array of services and approaches to better serve you and your individual needs. Please address the therapist individually and not Diamond Bar Psychological as a group. 

Marriage Family Therapist

Direct Phone Number

(909) 345-4511

California License Number MFT20455

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Lynn Yamamoto, MFT

Chino Hills Psychological

Formerly Diamond Bar Psychological and Family Services