Part D Cost Sharing for a Short Fill (Daily Cost-Sharing Rate)
Part D cost sharing for a fill shorter than the month's supply.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- The plan charges
- A copayment (dollars a month)
- Monthly copayment
- 47 dollars
- Days in the approved one-month supply
- 30 days
- Days actually dispensed
- 14 days
- A solid oral dose
- Yes
- An antibiotic
- No
- Dispensed in its original container or packaging
- No
Result: Cost sharing for the short fill: $21.98.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- The plan charges
- Monthly copayment
- Coinsurance
- Price of the supply actually dispensed, for coinsurance
- Days in the approved one-month supply
- Days actually dispensed
- A solid oral dose
- An antibiotic
- Dispensed in its original container or packaging
How this is calculated
Citation
42 CFR 423.153(b)(4) and 423.100: for a solid oral dose dispensed for less than the approved one-month supply, the monthly copayment divided by the days in that supply, rounded to the cent, times the days dispensed; coinsurance unchanged. Antibiotics and original-container products are excepted. Read the sources: 42 CFR 423.153 ↗, 42 CFR 423.100 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.