Level III-DWI Intermediate Level Treatment:

Meets criteria for DSM-IV Substance Dependence Diagnosis

Meets Level I ASAM program placement criteria

Minimum of 40 contact hours, minimum of 60 days duration
Level IV-Intensive Outpatient Treatment:

DSM-IV diagnosis of Substance Dependence, moderate to severe

Meets Level II ASAM program placement criteria

A minimum of 90 contact hours with a minimum duration of 90 days

According to ASAM, to be considered intensive outpatient, this requires at least 3 sessions and 9 hours per week in treatment. This program may be preceded by a brief inpatient stay for detoxification or stabilization of a medical or psychiatric condition.
Level V-Inpatient/Residential Treatment:

DSM-IV diagnosis of Substance Dependence, severe

Meets Level III or IV program placement criteria

Upon discharge from inpatient treatment, a person has to enroll in an approved continuing care or outpatient program to meet the 90-day time frame.
N. C. law allows up to 15 days credit for inpatient treatment in place of mandatory active sentence. However, an inpatient treatment facility can admit a person to inpatient treatment, ONLY, if that person meets the ASAM criteria for this level of treatment. This is true, even if the person wants to pay for this in full out of his own pocket.
Failure to follow the ASAM criteria can result in a facility's losing its Medicare or Medicaid accreditation and puts in jeopardy payments by private insurers. Admission to inpatient treatment is based solely on medical or psychiatric necessity, not on a legal requirement or personal preference! (From the DHHS DWI Services)
(ASAM refers to the criteria established by the American Society of
Addictive Medicine.)