A participant shall be eligible for care coordination services if the recipient: Is in a federal eligibility category for Maryland Medical Assistance according to COMAR 10.09.24, which governs the determination of eligibility for the Maryland Medical Assistance Program; and Meets the criteria of either §B(1) or (2) of this regulation. The participant: Shall: Meet the diagnostic requirements of being either: An individual younger than 18 years old with a serious emotional disturbance or co-occurring disorder; or A young adult with a serious emotional disturbance or co-occurring disorder enrolled in care coordination services continuously under this chapter since reaching age 18; and Require community treatment and support in order to prevent or address: Inpatient psychiatric or substance use treatment; Treatment in a RTC or residential substance use treatment facility; An out-of-home placement; Emergency room utilization due to multiple behavioral health stressors; Homelessness or housing instability, or otherwise lacking in permanent, safe housing; or Arrest or incarceration due to multiple behavioral health stressors; or Shall: Meet the requirements of §B(1)(a); and Need care coordination services to facilitate community treatment following: Release from a detention center or correctional facility; or Discharge to the community from RTC placement or inpatient psychiatric unit. A participant that disenrolls after reaching 18 years of age and wishes to re-enroll in care coordination services at a later date shall do so pursuant to COMAR 10.09.45 if more than 120 calendar days has passed since disenrollment.