Concurrent-Use Safety Measures (COB, Poly-ACH, Poly-CNS)
The Part D concurrent-use safety measures by CMS's published method: opioids with benzodiazepines (COB), two or more anticholinergics (Poly-ACH) and three or more CNS-active drugs (Poly-CNS) in older adults.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Measurement year
- 2025
- Members, one per line
- A, 50, yes
- Fills, one per line
- A, 2025-01-01, 30, oxycodone, opioid A, 2025-02-01, 30, oxycodone, opioid A, 2025-01-01, 30, lorazepam, benzodiazepine A, 2025-02-05, 30, lorazepam, benzodiazepine
Result: COB 1 of 1; Poly-ACH 0 of 0; Poly-CNS 0 of 0.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Measurement year
- Members, one per line: member, age, continuously enrolled (yes or no), exclusions separated by semicolons (optional)
- Fills, one per line: member, fill date (YYYY-MM-DD), days supply, medication, class (opioid, benzodiazepine, anticholinergic or cns)
How this is calculated
Citation
CMS. Medicare 2027 Part C and D Star Ratings Technical Notes (September 30, 2026), measures D12 (COB) and D13 (Poly-ACH); CMS 2026 Display Measures Technical Notes (December 16, 2025), DMD14 (Poly-CNS). Overlapping supply for 30 cumulative days; the reader assigns each class. Read the sources: 2027 Star Ratings Technical Notes ↗, 2026 display measures ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.