C91.5
Non-Billable
ChapterC00–D49
Ranksubcategory
Official Description
Adult T-cell lymphoma/leukemia (HTLV-1-associated)
Metadata & Insights
- •2026 ICD-10-CM Edition - Effective October 1, 2025.
- •Non-billable category (requires more specific sub-code).
- •Chapter 2: Neoplasms (C00-D49).
Instructional Notes
Includes
- Acute variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Chronic variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Lymphomatoid variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
- Smouldering variant of adult T-cell lymphoma/leukemia (HTLV-1-associated)
General instructions are available for the parent sections:
Clinical Hierarchy
CH2Neoplasms (C00-D49)
C81-C96Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
C91Lymphoid leukemia
C91.5Adult T-cell lymphoma/leukemia (HTLV-1-associated)
C91.50Adult T-cell lymphoma/leukemia (HTLV-1-associated) not having achieved remission
C91.51Adult T-cell lymphoma/leukemia (HTLV-1-associated), in remission
C91.52Adult T-cell lymphoma/leukemia (HTLV-1-associated), in relapse
Applicable Ancestor Context
The following parent sections contain instructions or notes that apply to C91.5:
blockC81-C96
Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
View context instructionsAlphabetic Index Mentions
These are Diagnosis Index lookup paths that route to C91.5. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.
2 raw paths
Leukemia, leukemic1 unique routes
MS-DRG Classification
No direct MS-DRG triggers identified.
Cross Reference
Find Procedures (ICD-10-PCS)
Find surgical and procedural codes related to Adult T-cell lymphoma/leukemia (HTLV-1-associated).
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