Contact Information

Monday - Friday: 8am - 5pm

• Member Services: (661) 273-7346

• After-Hours & Holidays: (661) 945-9411

  • HSMG Clinics and Urgent Care Centers will be closed on Monday December 25, 2023 in observance of Christmas

  • Our Lancaster Urgent Care will be open on Monday January 1, 2024 from 8AM - 5PM

  • Click here for Urgent Care Locations & Hours

• We offer TDD/TTY services for deaf, hard of hearing, and speech-impaired members. Please call (toll free): (800) 806-4474

Heritage Sierra Medical Group Offices

Administrative Departments

Claims:

• Heritage Sierra Medical Group, Claims Dept.,

  PO Box 7013, Lancaster, CA 93539

• Phone: (661) 480-2039

• Fax: (661) 480-2089

Utilization Management (UM):

• UM Hours: Monday-Friday 8:00am-5:00pm

• For UM Requests between 5pm-8am and weekends/holidays, please leave a message and it will be responded to within the next business day.

• Phone: (661) 579-2077

Outpatient Care Management:

• Phone: (661) 480-2022

• Fax: (661) 945-6280 or (661) 480-2091

Inpatient Case Management/Post-Stabilization Requests:

• Phone: (661) 298-1200 (24 hours, 7 days a week)

• Fax: (661) 579-2041 or (661) 480-2091

Additional Services

Heritage Sierra Medical Group provides services at no cost to anyone who require language assistance:

• Qualified sign language interpreters

• Written information in other formats (large print, audio, accessible electronic formats, other formats)

There are also services available to those whose primary language is not English, such as:

• Qualified interpreters

Additional free-of-charge services for HSMG members include:

• Over-the-Phone Interpreter

• Face-to-Face Interpreter

• Hearing Impaired Services

Please contact our Member Services Department if you need these services

• Member Services: (661) 273-7346
  8:00 a.m. to 5:00 p.m. from Monday - Friday

• TDD/TTY: (800) 806-4474
  8:00 a.m. to 5:00 p.m. from Monday - Friday

Toll Free Contact (Palmdale): (855) 291-0100