CommercialPrior AuthHigh impact
21-549 New Fax Numbers to Request Medication Prior Authorization
Health Net·CA·Prior Authorization
Effective date
Oct 1, 2021
We identified it
Jun 20, 2026
Summary
Health Net has updated fax numbers for requesting prior authorization for medications effective October 1, 2021. Different fax numbers are now required for different plan types (Commercial, Medicare, Medi-Cal) and medication categories (pharmacy vs. medical pharmacy).
Action Required
Immediately: Update all prior authorization workflows to use new fax numbers - Commercial plans use 866-399-0929, Medicare uses 800-977-8226, Medi-Cal pharmacy PA uses 866-399-0929, and Medi-Cal medical pharmacy PA uses 833-953-3436. Staff must update reference sheets, billing system templates, and train all personnel submitting medication prior authorizations. Using old fax numbers may result in delayed or rejected prior authorization requests.