Tag: drug formulary
Mar, 12 2026
What Is a Drug Formulary? Complete Explanation for Patients
A drug formulary is your insurance plan's list of covered medications. Learn how tiers, restrictions, and exceptions affect your out-of-pocket costs-and what to do when your drug isn't covered.
Feb, 10 2026
Medicare Part D Substitution: What You Can and Can't Swap Under Current Rules
Medicare Part D substitution rules determine whether you can swap one drug for another. Learn how formularies, tiers, and the $2,000 out-of-pocket cap affect your prescriptions - and what you can do to protect your coverage.