Medicare Advantage enrollment — in detail
Enrollment into one of Imperial Health Plan of California or Imperial Insurance Companies, Inc. (HMO) (HMO SNP) MAPD plans is easy. Please use one of the enrollment methods below:
Self Enroll with Imperial
Enroll directly through Imperial's own online application at members.imperialhealthplan.com/member/enroll. This same application also lets you shop and compare Imperial Medicare Advantage plans before you enroll.
Self Enroll Online →Self Enroll with Medicare Online Enrollment Center (OEC)
Complete the online enrollment application via the CMS Medicare Online Enrollment Center (OEC) at medicare.gov. By using the OEC, you acknowledge that you've reviewed the Summary of Benefits and Drug Formulary and the Provider Search tool available on this site, or by calling an Imperial Health Plan representative at 1-800-838-8271.
By Phone
Call us at 1-800-838-5914 (TTY: 711) and we'll complete the application with you over the phone.
Hours: October 1 – March 31, Monday – Sunday, 8:00 AM – 8:00 PM PST. April 1 – September 30, Monday – Friday, 8:00 AM – 8:00 PM PST.
By Mail or Fax
Download the enrollment form below and mail to Imperial Health Plan of California, Attn: Membership Department, PO Box 60874, Pasadena, CA 91116, or fax to 1-866-525-7136.
In Person
Schedule a face-to-face appointment with an employed Sales Representative or Independent Agent by calling 1-800-838-5914 (TTY: 711).
Hours: October 1 – March 31, Monday – Sunday, 8:00 AM – 8:00 PM PST. April 1 – September 30, Monday – Friday, 8:00 AM – 8:00 PM PST.
If you detect or suspect fraud, waste, or abuse (FWA), please report it immediately. Your report is confidential, and retaliation against anyone who reports a possible violation in good faith is prohibited.
Want to compare Imperial plans?
The same online enrollment application above also lets you shop and compare Imperial Medicare Advantage plans side by side and see what's covered, before you decide and enroll — all in one place.
Shop & Compare Plans →Enrollment Documents
Enrollment Documents
Forms below are provided in English, Spanish, Vietnamese, Chinese, and Korean. If you're enrolling in PBP 005 Imperial Senior Value (HMO C-SNP), you'll also need the SNP Assessment Form.
Forms below are provided in English, Spanish, Vietnamese, Chinese, and Korean. If you're enrolling in PBP 005 Imperial Senior Value (HMO C-SNP) or PBP 017 Imperial Flex Plan C-SNP, you'll also need the SNP Assessment Form.
- Enrollment Kit EN ES VI ZH KO
- Enrollment Application EN ES VI ZH KO
- Scope of Appointment Form EN ES VI ZH KO
- Electronic Notification EN ES
- Star Ratings EN ES VI ZH KO
- SNP Assessment Form Required for Senior Value (HMO C-SNP) PBP 005 and Flex Plan C-SNP (HMO) PBP 017 only EN ES VI ZH KO
- Over-the-Counter (OTC) Catalog (2027) EN
Still have questions?
Our Member Services and Sales teams are happy to walk you through your options. No pressure, no sales pitch.
Contact Us →Page last updated: September 9, 2026 at 12:00 PM PST (Build v5.7.154)
Imperial Health Plan is an (HMO) (HMO SNP) with a Medicare Contract. Enrollment in Imperial Health Plan depends on contract renewal.
Imperial Health Plan of California (HMO) (HMO SNP) complies with applicable Federal civil rights laws and does not discriminate on the basis of race, color, national origin, age, disability, or sex. Imperial does not exclude anyone or treat them unfairly because of race, color, national origin, age, disability, or sex. ATTENTION: If you speak English, free language assistance services are available to you. Appropriate auxiliary aids and services to provide information in accessible formats are also available free of charge. Call 1-800-838-8271 (TTY: 711) or speak to your provider.