Imperial Health Plan of California

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). Member eligibility verification.

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). UM phone and standard outpatient fax; do not combine multiple specialties in one fax.

Pre-certification referral form: urgent (expedited) requests by fax; call the main number option 1 to check referral status. A second standard fax (888-910-4412) also appears on the form.

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). Inpatient UM fax.

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). Office Ally payer ID IHP01 (Imperial Health Holdings Medical Group uses HHMG and PO Box 60075).

Mail the completed Imperial provider claim dispute form with supporting documentation.

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). Provider network management, contracting and general provider questions; Monday–Friday 8:00 a.m.–5:00 p.m. PST.

Imperial Health Plan of California Medicare Advantage; source is the 2025 Medicare provider manual (still linked on the current provider page). Fax the case management referral form with medical records.

Contracting and provider questions for Imperial exchange (individual & family) and small group products.