prior authorization
24/7 utilization management — post-stabilization and urgent requests (all HPN medical groups)
Confirm the exact product or service
California
Not researched for this route
HPN's contact page lists this single post-stabilization/urgent line; the referrals page calls it the 24/7 UM line for escalating urgent requests. Hospitals/ERs use it for post-stabilization authorization for members of HPN-affiliated groups (Regal, Lakeside, ADOC, HDMG, HVVMG, Desert Oasis, Sierra). Routine referrals go through the group's i.HMO provider portal.
View source ↗ · Source checked 2026-10-24 · 24/7 UM line (818-253-7670) for urgent requests ↗
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