Contact & Support

Endocrine Sciences’ client service center has a highly trained staff available to respond promptly to all questions or concerns about test information, specimen requirements, turnaround time, test add-ons, and patient results. Client service representatives may also direct client calls to a technical or medical expert if necessary.

Endocrine Services Hotline

Primary Phone:
877-436-3056
Primary Fax:
512-225-1253
Hours of Operation:
Monday–Friday 7:00 am–8:00 pm CST, Saturday 8:00 am–5:00 pm CST
Central Billing Services

Primary Phone:
800-343-4407
Patient billing phone:
800-845-6167
Hours of Operation:
Monday–Thursday 7:00 am–5:00 pm CST, Friday 7:00 am–4:00 pm CST