Across the ten states, 374,442 mental health service users who met the above criteria were enrolled in Medicaid during 1995. Of this group, 17 percent had at least one inpatient stay of any kind. Twelve percent had at least one inpatient stay for a nonpsychiatric reason, accounting for 75,528 such stays. Results are shown in Figures 1 and 2. All diagnostic categories that accounted for at least 5 percent of stays are displayed. Categories that accounted for fewer than 5 percent of stays, V codes, and symptom-related codes are included in the "other" category.