If I develop a chronic illness, can I use a Special Enrollment Period to join a Medicare Advantage Special Needs Plan?

Yes.  If you have or develop one of Medicare's defined severe or disabling chronic conditions (see chart below), you will be granted a Special Enrollment Period (SEP) to join a Medicare Advantage Special Needs Plan (SNP) designed to serve people with the specific condition.  You can use the one-time SEP during the plan year with coverage starting on the first day of the month after your enrollment.

As noted by Medicare, the Centers for Medicare and Medicaid Services (CMS):

"CMS will provide [a Special Enrollment Period (SEP)] for those individuals with severe or disabling chronic conditions to enroll in a [Medicare Advantage Special Needs Plan (SNP)] designed to serve individuals with those conditions. This SEP is available while the individual has the qualifying condition(s); it ends upon enrollment in the chronic care SNP.

Once the SEP ends, that individual may make enrollment changes only during applicable MA election periods [such as the AEP and MA-OEP].

In addition, individuals enrolled in a Chronic Care SNP who have a severe/disabling chronic condition which is not a focus of their current SNP are eligible for this SEP.  Such individuals have an opportunity to enroll in a Chronic Care SNP that focuses on this other condition.  Eligibility for this SEP ends at the time the individual enrolls in the new SNP." [formatting and links added]

Annual Changes in the SNP Landscape

The number and type of Medicare Advantage Special Needs Plans usually changes every year - so be sure to check the availability of different Chronic Care SNPs in your area.  Here is an example list of Chronic Care SNPs (C-SNPs) showing the changes and availability from the previous year.  You can also read more in our article: Changes in the national Special Needs Plan (SNP) landscape result in slightly more 2025 SNP options and wider availability.

Seeing the Medicare Advantage Chronic Condition Special Needs Plans (C-SNPs) in your area.

You can use our Medicare Advantage Plan Finder (MA-Finder.com) to see all Medicare Advantage plans in a specific Service Area (ZIP Code area).  As an example, you can begin with Medicare Advantage plans in HILLSBOROUGH County, Florida at MA-FInder.com/33592.  Then you can choose the Special Needs Plan filter in the search criteria area to see only specific Special Needs Plans, such as Chronic Care SNPs.


When you search using this C-SNP filter, you will see the C-SNPs available in the county along with the "Chronic condition(s)" under the right-most column heading "Eligibility Requirements for SNP" and text such as "Cardiovascular Disorders, Chronic Heart Failure and Diabetes" that the Medicare Advantage plan was designed to meet.


And when your health improves and you no longer meet the Chronic Condition requirement...

As a reminder, if your health should improve or you do not show the qualifying chronic condition and longer qualify for the Special Needs Plan, CMS will provide you with an SEP to join another Medicare Advantage plan in your area.


Reference:
Medicare Managed Care Manual, Chapter 2 - Medicare Advantage Enrollment and Disenrollment, Updated: August 19, 2011 (Revised: November 16, 2011, August 7, 2012, August 30, 2013, August 14, 2014, July 6, 2015, September 1, 2015, September 14, 2015, December 30, 2015,May 27, 2016, August 25, 2016, June 15, 2017, July 31, 2018& August 12, 2020), p.44