ICD10Check
CheckerBrowseOpen

C91.12

✓ Billable

Chronic lymphocytic leukemia of B-cell type in relapse

Neoplasms (C00-D49)

Check This Code

❌ Excludes1

inherited from C91.1

Rules from parent category C91.1: Chronic lymphocytic leukemia of B-cell type

  • • lymphoplasmacytic lymphoma (C83.0-)

🧪 Validate Combinations

Add C91.12 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeC91.12
BillableYes
ParentC91.1
CategoryNeoplasms (C00-D49)
Excludes11 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)