Open enrollment for 2027 opens November 1, 2026, and runs through January 15, 2027. Enroll by December 15 for coverage starting January 1; enroll December 16 to January 15 and your coverage starts February 1. Before you pick a plan, answer one question first: is your doctor covered? A plan that looks cheap on premium can turn expensive fast if your doctor is out-of-network. Out-of-network care usually costs far more — and sometimes is not covered at all. Here is how to check in minutes. Step 1: Find your plan's provider directory. Every insurer has an online provider directory on its website or app. Search by your doctor's name, specialty, and location. Make sure you are looking at the 2027 directory for the exact plan you are considering — not last year's plan, and not a different plan with a similar name. Step 2: Call your doctor's office. Directories can be out of date. Call the office and ask one clear question: "Are you in-network for [plan name] in 2027?...