HCPCS Drug Billing Units (Dose -> Units)

Convert an administered dose to HCPCS/J-code billing units by the code descriptor unit size, with the rounding rule and a clean-multiple check.

Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.

Example

Administered dose: 35
Dose unit: mg
Billing unit size per the HCPCS descriptor: 10
Billing unit measure: mg
Rounding: Round up (single-dose default)

Result: 35 mg / 10 mg per unit = 3.5 -> 4 billing units (rounded up); not a clean multiple.

The tool opens with these values already filled in. Replace them with your own.

What you enter

NDC (reads the code and unit from the CMS crosswalk)
HCPCS code, when the NDC bills under more than one
Administered dose
Dose unit
Billing unit size per the HCPCS descriptor (not needed with an NDC)
Billing unit measure (not needed with an NDC)
Rounding: up, down, or nearest (default up)

How this is calculated

Citation

CMS HCPCS Level II drug descriptors (each code's billing unit) and Pub. 100-04 Ch. 17: dose divided by the billing-unit size, rounded per the unit's rule. The unit is entered, or read with the code from the CMS ASP NDC-HCPCS crosswalk for an NDC. Read the source ↗

A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.