B97.33

Billable
ChapterA00–B99
Ranksubcategory
Official Description

Human T-cell lymphotrophic virus, type I [HTLV-I] as the cause of diseases classified elsewhere

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99).
General instructions are available for the parent sections:
View CH1 NotesView B97.3 Notes

Clinical Hierarchy

CH1Certain infectious and parasitic diseases (A00-B99)
B95-B97Bacterial and viral infectious agents (B95-B97)
B97Viral agents as the cause of diseases classified elsewhere
B97.3Retrovirus as the cause of diseases classified elsewhere
B97.33Human T-cell lymphotrophic virus, type I [HTLV-I] as the cause of diseases classified elsewhere

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to B97.33:

subcategoryB97.3
Retrovirus as the cause of diseases classified elsewhere
View context instructions
chapterCH1
Certain infectious and parasitic diseases (A00-B99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to B97.33. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

5 raw paths
Human1 unique routes
T-cell lymphotropic virus
type-1 (HTLV-I) infection
as cause of disease classified elsewhere→B97.33
Infection, infected, infective (opportunistic)3 unique routes
retrovirus
as cause of disease classified elsewhere
human
T-cell lymphotropic
type I (HTLV-I)→B97.33
virus, viral NOS(2 variants)
as cause of disease classified elsewhere(2 variants)
human
T-cell lymphotropic,
type I (HTLV-I)→B97.33
retrovirus
human
T-cell lymphotropic,
type I (HTLV-I)→B97.33
Retrovirus, as cause of disease classified elsewhere1 unique routes
human
T-cell lymphotropic
type I (HTLV-I)→B97.33

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 865
Viral Illness with MCC
DRG 866
Viral Illness without MCC

Cross Reference

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