National Clinician Consultation Center

800-933-3413 - Monday-Friday, 9 am - 8 pm ET. For questions about HIV/AIDS, including antiretroviral therapy, HIV clinical manifestations, and laboratory evaluation. In addition to a phone consultation, you can register and submit an online case consultation for non-urgent questions about HIV and hepatitis C.

888-448-8765 - For questions about the care of HIV-infected pregnant women as well as indications and interpretations of rapid and standard HIV tests. Available 24 hours/day, 7 days/week.

844-HEP-INFO (844-437-4636) - Monday-Friday; 9 am - 8 pm ET. Call for clinician-to-clinician advice on hepatitis C infection management, from testing and treatment initiation to management of advanced disease.

855-HIV-PrEP (855-448-7737) - For questions about the appropriateness, administration, laboratory, and follow-up procedures of pre-exposure prophylaxis (PrEP) as an HIV prevention tool.

888-448-4911 - Hours of operation for occupational PEP consultation are 11 a.m. – 8 p.m. ET (seven days a week). If you are trying to reach us regarding an occupational PEP question outside of these hours, please check out our PEP Quick Guide for Occupational Exposures. Hours of operation for non-occupational PEP consultation are 9 a.m. – 8 p.m. ET Monday – Friday, and 11 a.m. – 8 p.m. ET on weekends & holidays.

855-300-3595 - The Substance Use Warmline offers free and confidential peer-to-peer telephone consultation for primary care clinicians focusing on substance use evaluation and management. Consultation is available Monday - Friday, 9 am - 8 pm ET, from addiction medicine-certified physicians, clinical pharmacists, and nurses with expertise in pharmacotherapy options for opioid use. Voicemail is available 24 hours a day.