Keystone Substance Abuse Services
Keystone Substance Abuse Services is an addiction treatment facility at 199 South Herlong Avenue in Rock Hill, South Carolina, offering detoxification, partial hospitalization or residential treatment, and outpatient treatment, according to its SAMHSA FindTreatment.gov listing as of April 10, 2026. The same record also lists medication-assisted treatment and opioid treatment medications. Payment options listed in the record include Cash or self-payment, Federal, or any government funding for substance use treatment programs, IHS/Tribal/Urban (ITU) funds, and Medicaid. The directory lists 803-324-1800 as the facility's phone number. All details on this page come from that federal record and should be confirmed directly with the facility.
199 South Herlong Avenue, Rock Hill, SC, 29732
Contact & Location
Address: 199 South Herlong Avenue, Rock Hill, SC, 29732
Phone: 803-324-1800
Website: https://www.keystoneyork.org
Services & Programs
Treatment Types
- Detoxification
- Opioid Medication Service Components
- Opioid Treatment Medications
- Outpatient
- Partial Hospitalization / Residential
- Substance Use Medication-Assisted Treatment
Insurance & Payment
- Cash or self-payment
- Federal, or any government funding for substance use treatment programs
- IHS/Tribal/Urban (ITU) funds
- Medicaid
- Payment assistance (check with facility for details)
- Private health insurance
- SAMHSA funding/block grants
- Sliding fee scale (fee is based on income and other factors)
Languages & Accessibility
- Sign language services for the deaf and hard of hearing
Other facilities in Rock Hill
- Rock Hill Treatment Specialists
803-526-7666
Other facilities in South Carolina
- York County Treatment Center
Fort Mill, SC
803-547-7238 - Chester County Alcohol and Drug Abuse
Chester, SC
803-377-8111 - Lancaster Treatment Specialists
Lancaster, SC
803-745-7001 - Counseling Services of Lancaster
Lancaster, SC
803-285-6911
View all Rock Hill facilities →
Levels of care this record lists, across South Carolina: Detox · Residential · Medication-Assisted Treatment · Outpatient
Need Help Deciding?
Contact Keystone Substance Abuse Services directly at 803-324-1800, or call the SAMHSA National Helpline for free, confidential referrals 24/7.
SAMHSA Helpline: 1-800-662-HELP