Reactive Attachment Disorder (RAD) has been diagnosed in this patient based on consistent observation and clinical interview data.  Presenting symptoms include markedly disturbed and developmentally inappropriate social relatedness as evidenced by inhibited, emotionally withdrawn behavior toward adult caregivers.  The patient demonstrates persistent social and emotional disturbance with minimal social and emotional responsiveness to others, limited positive affect, and episodes of unexplained irritability, sadness, or fearfulness, especially in new situations.  The child struggles to form selective attachments, displaying a lack of comfort seeking and responsiveness to comforting when distressed.  Differential diagnoses considered included Autism Spectrum Disorder, intellectual disability, and post-traumatic stress disorder; however, these were ruled out based on a comprehensive developmental and psychosocial assessment.  The patient's history confirms a pattern of extremes of insufficient care including social neglect or deprivation, repeated changes of primary caregivers that limit opportunities to form stable attachments, and rearing in unusual settings that severely limit opportunities to form selective attachments, such as institutions with high child-to-caregiver ratios.  These adverse experiences are etiologically related to the disturbed behavior.  The patient's age is consistent with the diagnostic criteria for RAD, being older than nine months and younger than five years at the time of initial assessment.  Treatment recommendations include a referral to a child and adolescent psychiatrist for further evaluation and potential medication management, play therapy focused on attachment and trauma, and parent training specifically targeting attachment-based parenting strategies.  The prognosis, while guarded, is dependent on the consistency and quality of the provided interventions and the caregiver's capacity to provide a nurturing and stable environment.  Ongoing monitoring and reassessment are essential to track progress and adjust the treatment plan as needed.  ICD-10 code F94.1 and DSM-5 criteria are met for Reactive Attachment Disorder, Inhibited Type.  Medical billing codes for evaluation, therapy, and medication management will be utilized as appropriate throughout the course of treatment.