BI-RADS Assessment Category (Breast Imaging)
ACR BI-RADS breast-imaging assessment categories (5th ed, 2013).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- BI-RADS final assessment category
- 4B — moderate suspicion (over 10% to 50%)
Result: BI-RADS 4B: moderate suspicion for malignancy (greater than 10% to no more than 50% likelihood); biopsy recommended.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-2
- 0: incomplete, need more imaging or prior comparison. 1: negative (~0%). 2: benign (~0%).
- 3
- Probably benign (> 0% to <= 2%); short-interval follow-up.
- 4 (4A/4B/4C)
- Suspicious (> 2% to < 95%); biopsy. 4A > 2-10%, 4B > 10-50%, 4C > 50 to < 95%.
- 5 / 6
- 5: highly suggestive of malignancy (>= 95%), biopsy. 6: known biopsy-proven malignancy.
What you enter
- BI-RADS final assessment category
How this is calculated
D'Orsi CJ, Sickles EA, Mendelson EB, Morris EA, et al. ACR BI-RADS Atlas, Breast Imaging Reporting and Data System. 5th ed. Reston, VA: American College of Radiology; 2013. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.