The percent of Part D beneficiaries 65 years or older with a diagnosis of or prescriptions for dementia, who received at least one prescription and greater than 30 total days supply for any antipsychotic medication, AND who did not have a diagnosis for schizophrenia, bipolar disorder, Huntington's disease, or Tourette's Syndrome.

The number of member-years of enrolled beneficiaries 65 years and older in the denominator who received at least one prescription and greater than 30 total days supply for any antipsychotic medication.

The number of member-years of enrolled beneficiaries 65 years and older who had either (i) a dementia diagnosis and/or (ii) two or more prescription claims with unique dates of service and total days supply greater than 60 cumulative days for a cholinesterase inhibitor or NMDA receptor antagonist during the period measured.

Contracts with 30 or fewer enrolled member-years (in the denominator). Beneficiaries with a diagnosis for schizophrenia, bipolar disorder, Huntington's Disease, or Tourette's Syndrome

Prescription Drug Event (PDE) data files submitted to CMS Drug Data Processing System (DDPS), Common Medicare Environment (CME) for enrolment information, the Minimum Data Set (MDS) for nursing home information, the Common Working File (CWF) ICD-10-CM codes to identify diagnoses, the Encounter Data Systems (EDS) used to identify diagnoses based on ICD-10-CM codes, and the PQA Medication Lists, which include the NDCs for this measure.

www.cms.gov/medicare/health-drug-plans/part-c-d-performance-data

www.cms.gov/files/document/2025-star-ratings-technical-notes.pdf