() About ProviderA Mental Health Clinic in Lancaster, California. Mental health clinics provide diagnostic, treatment, and prescriptive services related to mental and behavioral disorders. Visit Site Contact Information (661) 471-4000 335 E Avenue ILancaster, CA 93535 How useful was this information? Click on a star to rate it! Submit Rating Average rating / 5. Vote count: No votes so far! Be the first to rate this information. Since you found this information useful... Share with others! We are sorry this was not useful for you! Help us improve! Tell us how we can improve this post? Submit Feedback Tags:mental health