Medicare Part D Coverage Restrictions and Patient Cost-Sharing for Opioids Commonly Used for Cancer Pain, 2015-2021.

Medicare PDP coverage has become increasingly restrictive for opioids commonly used for cancer-related pain, with multifold increases in patient OOP costs over the past 7 years. These changes pose concerns for patients with cancer needing opioid therapies for pain control and call for strategies to effectively exempt cancer-related pain from insurance and pharmacy rules intended to apply to opioids for noncancer chronic pain.