Medicare Advantage

C-SNPs in Buffalo for 2027: how a chronic diagnosis can open a special enrollment window

Erie County has 60 Medicare Advantage plans for 2027. Compared with 2026, 21 plans are not coming back, 11 are new, and 18 continuing plans changed in some way you should check before December 7, 3 of them under a new name. This guide covers what those numbers mean for Buffalo, not which plan to pick.

BUFFALO — As the Annual Enrollment Period opens Oct. 15, 2026 and runs through Dec. 7, Western New Yorkers living with a long-term health condition have a specific slice of the Medicare Advantage market to look at: Chronic Condition Special Needs Plans, or C-SNPs. In Erie County, which includes Buffalo, four C-SNPs will be offered for 2027, and the rules for joining one are different from a regular Advantage plan.

What is a C-SNP, and how does it work in Buffalo for 2027?

A C-SNP is a Medicare Advantage plan designed around one or more chronic conditions, such as diabetes, heart conditions or chronic lung disease. It is still Part C coverage — it replaces Original Medicare while you are enrolled, and the C-SNPs available in Erie County for 2027 all include Part D drug coverage. The difference is that enrollment is limited to people who have the condition the plan is built for, and the plan's provider network, drug list and care management are shaped around that condition.

Because availability is set at the county level, Buffalo residents choose from the C-SNPs CMS lists for Erie County. The table below shows every C-SNP in the county for 2027.

Which C-SNPs are offered in Erie County for 2027?

Four of the Medicare Advantage plans in Erie County for 2027 are C-SNPs, offered by three carriers. In alphabetical order by carrier, they are:

• Aetna Medicare Chronic Care (HMO C-SNP) — Aetna (CVS Health); new for 2027
• Aetna Medicare Chronic Care Total (HMO C-SNP) — Aetna (CVS Health); new for 2027
• Independent Health's Assure Advantage (HMO C-SNP) — Independent Health
• UHC Complete Care NY-30 (HMO-POS C-SNP) — UnitedHealthcare

Two of the four are new for 2027, both from Aetna. The other Special Needs Plans in the county for 2027 are 16 D-SNPs (for people with both Medicare and Medicaid) and 4 I-SNPs (for people in or needing nursing-home-level care); those are separate categories with their own eligibility rules.

We are not naming which specific condition each plan serves unless the plan's name says it, and we are not comparing costs, benefits, drug lists or star ratings. Those details live in each plan's Summary of Benefits and Evidence of Coverage.

Who qualifies to join a C-SNP in Buffalo?

To enroll in a C-SNP you need a qualifying chronic condition that is verified by a provider. In practice, after you apply, the plan contacts your doctor (or asks you for the doctor's information) to confirm the diagnosis in writing. If the condition is not confirmed within the plan's timeframe, the enrollment can be ended.

CMS defines the list of qualifying chronic conditions — common ones include diabetes, chronic heart failure, cardiovascular disorders, chronic lung disorders and end-stage renal disease, but there are others. The plan itself specifies which condition or conditions it serves, so a C-SNP you are eligible for may not match a neighbor's situation at all.

When can I join a C-SNP — do I have to wait for Oct. 15?

No. A qualifying chronic condition opens a Special Enrollment Period (SEP) that lets you join a C-SNP outside the Oct. 15–Dec. 7 Annual Enrollment Period. The SEP is available once you have a confirmed diagnosis of a condition the plan serves, and it generally stays open as long as you continue to have the condition and are eligible for the plan.

If you join during the Annual Enrollment Period that runs Oct. 15 – Dec. 7, 2026, coverage starts Jan. 1, 2027. If you use the chronic-condition SEP at another time of year, the plan will tell you the effective date based on when you enrolled and when your diagnosis was verified. Either way, if you do nothing, your current plan simply renews for 2027 with the changes described in its Annual Notice of Change (ANOC) — the notice your plan mails each fall.

How should I decide between a C-SNP and a regular Medicare Advantage plan?

Think of a C-SNP as a plan built around one health problem, with the drug list, specialists and care coordination aimed at that condition. A regular Medicare Advantage plan — Erie County has 60 Medicare Advantage plans overall for 2027 — is built for the general Medicare population. Neither is automatically better; it depends on your diagnoses, your doctors and your medications.

A few things worth checking before you decide:

• Are your doctors and preferred hospitals in the plan's network?
• Are your prescriptions on the plan's formulary, and at what tier?
• What are the plan's rules for referrals, prior authorization and out-of-area care?
• How does the plan coordinate care for your condition, and is a care manager assigned?

For 2027, Part D has an out-of-pocket cap of $2,400 (up from $2,100 in 2026) and a maximum deductible of $700 (up from $615 in 2026) — those limits apply across Part D plans, including the drug coverage inside a C-SNP. The 2027 Part B standard premium and deductible, and the 2027 IRMAA income brackets, have not been announced yet; CMS typically publishes them in the fall.

Where do I get plan-specific details and personalized help?

The Medicare Plan Finder at medicare.gov lets you enter your ZIP code, your drugs and your providers, and it will show C-SNPs you may be eligible for alongside other Advantage and Part D plans. You can also call 1-800-MEDICARE, 24 hours a day, seven days a week. For a specific C-SNP, the plan's own Summary of Benefits, Evidence of Coverage and provider and pharmacy directories are the authoritative source.