Inclusion Criteria:  Physician diagnosis of neurofibromatosis type 1 Age 12-17 Main language spoken in the home is English Reliable internet access Current functional impairment in peer relationships Teen is interested and motivated to participate  Exclusion Criteria:  Main language spoken in the home is not English Cognitive or developmental difficulties that affect reading comprehension or understanding of treatment material Significant behavioral concerns Other comorbid medical conditions Major surgery in past 6 months Prior social skills group treatment within past 6 months Prior participation in PEERS