Part D Adherence (PDC, Star Method)
Part D adherence rates by the Star Ratings method from a fill history.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Fills, one per line
- Ann, D10, 2026-01-05, 30, atorvastatin Ann, D10, 2026-02-10, 30, atorvastatin Ann, D10, 2026-03-20, 90, atorvastatin Ann, D10, 2026-06-25, 90, atorvastatin Ann, D10, 2026-09-20, 90, atorvastatin Bo, D10, 2026-02-01, 30, rosuvastatin Bo, D10, 2026-05-01, 30, rosuvastatin
- Inpatient or skilled nursing stays, one per line
- Ann, 2026-04-01, 2026-04-10
- Measurement year
- 2026
Result: D10 (statins): 1 of 2 adherent, 50%.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Fills, one per line: patient, measure (D08, D09 or D10), fill date, days supply, ingredient
- Inpatient or skilled nursing stays, one per line: patient, admit date, discharge date (removed for measurement years through 2025 only)
- Exclusions, one per line: patient, hospice or esrd or dialysis
- Measurement year
How this is calculated
Citation
CMS 2027 Star Ratings Technical Notes (September 30, 2026), measures D08-D10 and Attachment L: PDC of 80% or more, stay days removed through measurement year 2025. From 2026: risk-adjusted measures with no stay adjustment (CMS Patient Safety memo, April 22, 2026). Read the sources: 2027 Technical Notes ↗, Patient Safety memo, April 2026 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.