| APT Foundation Inc, Access and Treatment Services | New Haven | Intensive outpatient, Regular outpatient | Yes |
| APT Foundation Inc, Amethyst House | New Haven | Short-term residential, Long-term residential | Yes |
| APT Foundation Inc, Residential Services Division | New Haven | Short-term residential, Long-term residential | Yes |
| Chemical Abuse Services Agency Inc, CASA/MAAS Methadone Supported Servs | New Haven | Intensive outpatient, Regular outpatient | Yes |
| Connecticut Counseling Centers Inc, Danbury Clinic | Danbury | Intensive outpatient, Regular outpatient | Yes |
| Connecticut Counseling Centers Inc, Meriden Clinic | Meriden | Intensive outpatient, Regular outpatient | Yes |
| Connecticut Counseling Centers Inc, Norwalk Clinic | Norwalk | Intensive outpatient, Regular outpatient | Yes |
| Connecticut Counseling Centers Inc | Waterbury | Intensive outpatient, Regular outpatient | Yes |
| Connecticut Valley Hospital, Blue Hills Substance Services | Hartford | Hospital inpatient | Yes |
| Connecticut Valley Hospital, Addiction Services Division | Middletown | Hospital inpatient | Yes |
| Connecticut Valley Hospital, General Psychiatry Division | Middletown | Hospital inpatient | Yes |
| Cornell Scott Hill Health Center, Ansonia Behavioral Health | Ansonia | Regular outpatient | Yes |
| Cornell Scott Hill Health Center, South Central Rehabilitation Center | New Haven | Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Hartford | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Manchester | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Middletown | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | New Britain | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | New London | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Torrington | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Willimantic | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Liberation Programs Inc, Pelletier Wellness Center | Bridgeport | Intensive outpatient, Regular outpatient | Yes |
| Liberation Programs Inc, Main Street Clinic | Stamford | Intensive outpatient, Regular outpatient | Yes |
| Liberation Programs Inc | Stamford | Intensive outpatient, Regular outpatient | Yes |
| Liberation Programs Inc, Stamford Methadone | Stamford | Intensive outpatient, Regular outpatient | Yes |
| New Era Rehabilitation Center Inc, NERC | Bridgeport | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| New Era Rehabilitation Center Inc, NERC | New Haven | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Recovery Network of Programs Inc, Kinsella Treatment Center MATS | Bridgeport | Intensive outpatient, Regular outpatient | Yes |
| Recovery Network of Programs Inc, Center for Human Services | Stratford | Regular outpatient | Yes |
| Silver Hill Hospital Inc | New Canaan | Hospital inpatient, Intensive outpatient | Not listed |
| Adult Psychiatric Clinic, Cornell Scott Hill Health Center | New Haven | Regular outpatient | Yes |
| BHcare Inc | Ansonia | Intensive outpatient, Regular outpatient | Yes |
| BHcare Inc | North Branford | Intensive outpatient, Regular outpatient | Yes |
| Bridges Healthcare Inc | Milford | Intensive outpatient, Regular outpatient | Yes |
| Capitol Region Mental Health Center | Hartford | Regular outpatient | Yes |
| Community Health Resources, Danielson Clinic | Danielson | Intensive outpatient, Regular outpatient | Yes |
| Community Health Resources, Manchester Clinic | Manchester | Intensive outpatient, Regular outpatient | Yes |
| Community Mental Health Affiliates, Adult Behavioral Health Clinic | New Britain | Regular outpatient | Yes |
| Connecticut Renaissance Inc, Behavioral Health OP Clinic | Norwalk | Intensive outpatient, Regular outpatient | Yes |
| Connection Center for Behavioral, Health | Norwich | Intensive outpatient, Regular outpatient | Yes |
| Cornell Scott Hill Health Center, Dixwell Behavioral Health Services | New Haven | Regular outpatient | Yes |
| Cornell Scott Hill Health Center, Recovery and Wellness Center | New Haven | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Fair Haven Community Healthcare | New Haven | Regular outpatient | Yes |
| Farrell Treatment Center | New Britain | Short-term residential, Intensive outpatient, Regular outpatient | Yes |
| Gilead Community Services Inc, Middletown Outpatient Clinic | Middletown | Intensive outpatient, Regular outpatient | Yes |
| Hartford Dispensary, Root Center for Advanced Recovery | Middletown | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Hockanum Valley Community Council Inc | Vernon Rockville | Regular outpatient | Yes |
| InterCommunity Healthcare | East Hartford | Intensive outpatient, Regular outpatient | Yes |
| InterCommunity Inc | Hartford | Intensive outpatient, Regular outpatient | Yes |
| Life Center of Connecticut Inc, Life Center Mens Home | Hartford | Short-term residential, Long-term residential, Transitional housing | Yes |
| McCall Behavioral Health Network, Travisano Outpatient Clinic | Danbury | Intensive outpatient, Regular outpatient | Yes |
| McCall Behavioral Health Network, Outpatient Clinic | Torrington | Intensive outpatient, Regular outpatient | Yes |
| McCall Behavioral Health Network, Renato Outpatient Clinic | Waterbury | Intensive outpatient, Regular outpatient | Yes |
| McCall Behavioral Health Network, Winsted Office | Winsted | Regular outpatient | Yes |
| Natchaug Hospital Inc, Joshua Center Northeast | Danielson | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Natchaug Hospital Inc, Quinebaug Treatment Center | Dayville | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Natchaug Hospital Inc, Sachem House | Mansfield Center | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| PursueCare Connecticut PC | Middletown | Regular outpatient | Yes |
| Recovery Network of Programs Inc, Recovery Counseling Services | Bridgeport | Intensive outpatient, Regular outpatient | Yes |
| Reid | Danbury | Intensive outpatient, Regular outpatient | Yes |
| Reid | Torrington | Intensive outpatient, Regular outpatient | Yes |
| Renew Health, Recovery | Middletown | Regular outpatient | Not listed |
| Rushford Center Inc | Meriden | Partial hospitalization, Intensive outpatient, Regular outpatient | Yes |
| Rushford Center Inc, Residential Intensive Treatment DMHAS | Middletown | Hospital inpatient, Short-term residential | Yes |
| Shoreline Family Healthcare | Branford | Regular outpatient | Yes |
| Shores Mental Health, A Part of St. Vincent's Medical Center | Westport | Hospital inpatient | Yes |
| Sound Community Services Inc | New London | Regular outpatient | Yes |
| Southwest Community Health Center | Bridgeport | Intensive outpatient, Regular outpatient | Yes |
| Southwest Connecticut MH Systems | Bridgeport | Regular outpatient | Yes |
| Southwest Connecticut MH Systems | Bridgeport | Regular outpatient, Transitional housing | Yes |
| Southwest CT MH Services System, F S DuBois Center | Stamford | Regular outpatient | Yes |
| State Street Counseling Services, Cornell Scott Hill Health Center | New Haven | Regular outpatient | Yes |
| StayWell Health Center, OASIS | Waterbury | Regular outpatient | Yes |
| Substance Use and Addiction Treatment | New Haven | Regular outpatient | Yes |
| United Community and Family Services, Psychiatric Outpt Clinic for Adults | Colchester | Regular outpatient | Yes |
| United Community and Family Services | Jewett City | Regular outpatient | Yes |
| United Community and Family Services | Moosup | Regular outpatient | Yes |
| United Community and Family Services | New London | Regular outpatient | Yes |
| United Community and Family Services | Norwich | Regular outpatient | Yes |
| United Services Inc | Dayville | Regular outpatient | Yes |
| United Services Inc | Mansfield Center | Regular outpatient | Yes |
| Veterans Affairs, Connecticut Healthcare System | Newington | Intensive outpatient, Regular outpatient | Yes |
| Village for Families and Children, MAT Naltrexone | Hartford | Intensive outpatient, Regular outpatient | Yes |
| Waterbury Outpatient Clinic | Waterbury | Regular outpatient | Not listed |
| Waterstone Counseling Center | Madison | Regular outpatient | Yes |
| Wellmore Inc, Standard Outpatient | Waterbury | Intensive outpatient, Regular outpatient | Yes |
| West Haven Adult Behavioral Health, Cornell Scott Hill Health Center | West Haven | Regular outpatient | Yes |