We make Medicare easy, right from the start.
There are 3 easy ways to enroll in a Medicare Advantage plan from Mass General Brigham Health Plan.
Answer these questions before you get started
Am I eligible?
You are eligible to enroll in a Medicare Advantage plan from Mass General Brigham Health Plan if you:
1. Have Medicare Part A and Part B. You must continue to pay your Part B premium and reside in the plan’s designated service area. Not enrolled in Part A and Part B? Contact the Social Security Administration.
2. Live in these Massachusetts counties: Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk, and Worcester.
When can I sign up?
You can only sign up for Medicare Advantage after certain life events or during certain times of year. Learn about the four types of enrollment periods below.
Initial Enrollment Period (IEP). The IEP is a 7-month period that begins 3 months before the month a person turns 65 (their birthday month) and ends 3 months after the person turns 65.
For someone under age 65 who becomes entitled to Medicare based on disability, entitlement begins with the 25th month of disability benefit entitlement. For these individuals, the IEP begins 3 months before the 25th month of disability benefit entitlement, includes the 25th month, and ends three months after. The IEP for people with ESRD and ALS varies based on their situation.
Medicare Annual Enrollment Period (AEP). This takes place every year from October 15 to December 7. During this period you can sign up for, switch, or leave a Medicare Advantage plan.
Medicare Open Enrollment Period (OEP). This takes place every year from January 1 to March 31. During this period you can switch between Medicare Advantage plans.
Special Enrollment Period (SEP). This takes place when certain qualifying events happen, including losing employer coverage, retiring, moving, or other situations. Enrollment timing depends on the situation. You can learn more about SEPs here.
You can self-enroll using our Medicare Advantage Online Enrollment tool
This tool will walk you through selecting a plan and filling out the online enrollment application. It will take about 20 minutes to complete.
Call 855-486-3097 (TTY 711) to enroll right over the phone in minutes.October 1 – March 31, 8 AM-8 PM ET, Mon-Sun
April 1 – September 30, 8 AM-8 PM ET, Mon-Fri
Download the Mass General Brigham Health Plan 2024 Application (PDF) (Updated 10/15/23)
To complete the application:
- Select your plan choice on the application.
- Be sure to fill out one application for each person enrolling.
- Sign and date the application(s).
- Send your completed application(s) to:
Mass General Brigham Health Plan
399 Revolution Drive, Suite 850
Somerville, MA 02145
IMPORTANT: In order for your enrollment to be effective on the first day of the month, you must enroll no later than the last business day of the previous month. For example, if you enroll on January 31, your coverage will begin February 1 (depending on the enrollment period).
*Medicare beneficiaries may also enroll in a Medicare Advantage plan through the CMS Medicare Online Enrollment Center located at medicare.gov.
What happens after I enroll?
Once you join a Medicare Advantage plan from Mass General Brigham Health Plan, you will receive these things by mail:
1. A confirmation letter from Mass General Brigham Health Plan in about 10 days, letting you know we received your application and that Medicare has approved your enrollment in your Medicare Advantage plan.
- You can use this letter at doctor appointments until your Mass General Brigham Advantage Member ID card arrives.
2. Your Mass General Brigham Health Plan member ID card.
- Always carry and show your Mass General Brigham Health Plan membership card when you visit your doctor, pharmacy, or dentist.
- Keep your Medicare card at home for your records.
Within 15 days of enrollment, a representative will contact you to confirm you understand your enrollment and terms of your new Medicare Advantage plan from Mass General Brigham Health Plan.
A note about prior authorization
Prior authorization is a process in which Mass General Brigham Health Plan works with you and your doctors to make sure you receive medically necessary, high-quality medical treatment at a reasonable cost. Some services require prior authorization by Mass General Brigham Health Plan regardless of whether these services are given by Mass General Brigham Health Plan contracted or non-contracted providers.
Some examples of services needing prior authorization include:
- Diagnostic services, such as CT scans and MRIs
- Admissions to transitional care units, acute rehabilitation, and skilled nursing facilities
- Inpatient hospital
- Durable medical equipment
- Home care services
- Select prescription drugs