A digital therapeutic system to treat a subject with a personal therapeutic treatment plan, comprising: one or more processors comprising software instructions for: a diagnostic module comprising machine readable instructions able to run on the one or more processors wherein the diagnostic module provides diagnostic tests to a digital device, the diagnostic tests are configured to evaluate a plurality of features of the subject that may be relevant to one or more behavioral, neurological or mental health disorders which have at least some overlap in features of the subject, and wherein feature values are provided by the subject, and the relationship between those values and a predicted risk for said behavioral, developmental, or mental health disorders are determined by an assessment model, the diagnostic tests dynamically adjust the selection of next features to be evaluated in the subject and wherein the diagnostic module comprising a diagnostic machine learning classifier trained on a subject population to determine diagnostic data for the subject, the diagnostic data comprise an indication of a presence of one of said one or more behavioral, neurological, or mental health disorders in said subject, wherein said one or more behavioral, developmental, or mental health disorders are selected from the group consisting of autism, autistic spectrum disorder, attention deficit disorder, attention deficit hyperactivity disorder, obsessive compulsive disorder, intellectual disability, learning disability, speech and language delay, and speech and learning disability; and a therapeutic module comprising machine readable instructions able to run on the one or more processors configured to receive the diagnostic data and to provide the personal therapeutic treatment plan for the subject based on said diagnostic data, the therapeutic module comprising one or more of machine learning, a classifier, or statistical modeling based on at least a portion of the subject population to determine and output the personal therapeutic treatment plan, wherein the personal therapeutic treatment plan comprises a digital therapeutic comprising interactive sessions for treating said one or more behavioral, neurological, or mental health disorders indicated as present in the subject and is communicated to the digital device for presentation to the subject or a caregiver and wherein the diagnostic module is configured to receive updated subject data for the subject in response to treatment according to the personal therapeutic treatment plan and generate updated diagnostic data for the subject, and wherein the therapeutic module is configured to receive the updated diagnostic data and generate an updated personal therapeutic treatment plan in response to at least one of the diagnostic data and the updated diagnostic data. a diagnostic module comprising machine readable instructions able to run on the one or more processors wherein the diagnostic module provides diagnostic tests to a digital device, the diagnostic tests are configured to evaluate a plurality of features of the subject that may be relevant to one or more behavioral, neurological or mental health disorders which have at least some overlap in features of the subject, and wherein feature values are provided by the subject, and the relationship between those values and a predicted risk for said behavioral, developmental, or mental health disorders are determined by an assessment model, the diagnostic tests dynamically adjust the selection of next features to be evaluated in the subject and wherein the diagnostic module comprising a diagnostic machine learning classifier trained on a subject population to determine diagnostic data for the subject, the diagnostic data comprise an indication of a presence of one of said one or more behavioral, neurological, or mental health disorders in said subject, wherein said one or more behavioral, developmental, or mental health disorders are selected from the group consisting of autism, autistic spectrum disorder, attention deficit disorder, attention deficit hyperactivity disorder, obsessive compulsive disorder, intellectual disability, learning disability, speech and language delay, and speech and learning disability; and a therapeutic module comprising machine readable instructions able to run on the one or more processors configured to receive the diagnostic data and to provide the personal therapeutic treatment plan for the subject based on said diagnostic data, the therapeutic module comprising one or more of machine learning, a classifier, or statistical modeling based on at least a portion of the subject population to determine and output the personal therapeutic treatment plan, wherein the personal therapeutic treatment plan comprises a digital therapeutic comprising interactive sessions for treating said one or more behavioral, neurological, or mental health disorders indicated as present in the subject and is communicated to the digital device for presentation to the subject or a caregiver and wherein the diagnostic module is configured to receive updated subject data for the subject in response to treatment according to the personal therapeutic treatment plan and generate updated diagnostic data for the subject, and wherein the therapeutic module is configured to receive the updated diagnostic data and generate an updated personal therapeutic treatment plan in response to at least one of the diagnostic data and the updated diagnostic data.