Imperial Health Holdings Medical Group logo

Contact Us

Imperial Health Holdings is committed to supporting our provider partners with responsive service, streamlined communication, and accessible resources to ensure high-quality, coordinated care.

Our Focus for Providers:

Supporting efficient care delivery: We work closely with providers to reduce administrative burden and improve workflow efficiency.

Improving patient outcomes: Through coordinated utilization management, eligibility support, and clinical collaboration.

Ensuring compliance and integrity: We uphold regulatory standards while offering confidential reporting and compliance support.

Corporate Office

Address: 1100 E Green St, Pasadena, CA 91106

General Number: 626-838-5100

Contracting: Imperial Health Contract Inquiry Application

Provider Portal Inquiry: portal@imperialhealthholdings.com

Utilization Management (UM)

Phone: 626-598-3099

Outpatient Fax: 626-283-5021

Inpatient Fax: 626-380-9134

Eligibility, Benefits & Provider Services

Imperial Health Plan of CA (H5496): 800-830-3901

Imperial Insurance Companies, Inc – EXAZ / EXTX / EXNV: 800-595-0619

Imperial Insurance Plan of the SW – EXUT:
800-595-0619

Imperial Health Holdings (IHHMG): 626-838-5100

Health Cosmos – AZ: 602-830-1830

Health Cosmos – NV: 725-500-5655

Health Cosmos – NM: 505-966-9777

Lonestar: 806-853-8331

 
Claims

Claims Inquiries: 800-778-9302

Required TB Modifier for 340B Drugs

Q: Is the TB modifier required on claims for 340B-acquired drugs?

A: Yes. Effective immediately, all claims for eligible 340B-acquired drugs must include the required TB modifier, consistent with applicable CMS billing requirements.

Claims submitted without the required TB modifier may be rejected or denied as incomplete and will require correction and resubmission before processing.

Providers are responsible for ensuring that claims are submitted with all required modifiers and billing information. Failure to include the required TB modifier, when applicable, may result in delays in payment.

Questions? Contact Provider Services at pnm@imperialhealthholdings.com.

CompanyEDI Payor IDClaims PO Box Address
Imperial Health Holdings (IHHMG)IHHMGPO Box 60075 Pasadena, CA 91116
Imperial Health Plan of CA (H5496)IHP01PO Box 60874 Pasadena, CA 91116
Health Cosmos – AZCOSAZPO Box 61160 Pasadena, CA 91116
Health Cosmos – NVCOSNVPO Box 61210 Pasadena, CA 91116
Health Cosmos – NMCOSNMPO Box 60530 Pasadena, CA 91116
LonestarLNSTRPO Box 61150 Pasadena, CA 91116
Exchange or Marketplace
IIC – EX AZIEXAZPO Box 60567 Pasadena, CA 91116
IIC – EX TXIEXTXPO Box 61300 Pasadena, CA 91116
IIC – EX NVIEXNVPO Box 60590 Pasadena, CA 91116
IHPSW – EX UTIEXUTPO Box 60190 Pasadena, CA 91116
Compliance

Anonymously Call: 888-708-5377

Anonymously Send: IHP NavexOne Portal

Fax: 626-380-9054

Email: complianceFWA@imperialhealthplan.com

Mail: Compliance FWA, PO Box 60874 Pasadena, CA 91116

  • Email:
  • Subject:
  • Message:
  •