ICD-10-CM Alphabetic Index · FY 2026 23 Entries
Histiocytosis in the ICD-10-CM Index ICD-10-CM
The main term Histiocytosis carries 23 index entries pointing to 8 ICD-10-CM codes. The default entry is D76.3, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
23
Index Entries
8
Codes Referenced
D76.3
Default Code
H
Letter
23 of 23 shown
ICD-10-CM
Index Entries Under Histiocytosis 23 entries · 8 codes
Histiocytosis D76.3
acute differentiated progressive C96.0
Langerhans' cell NEC C96.6
multifocal X
multisystemic (disseminated) C96.0
unisystemic C96.5
pulmonary, adult (adult PLCH) J84.82
unifocal (X) C96.6
lipid, lipoid D76.3
essential E75.29
malignant C96.A
mononuclear phagocytes NEC D76.1
Langerhans' cells C96.6
non-Langerhans cell D76.3
polyostotic sclerosing D76.3
sinus, with massive lymphadenopathy D76.3
syndrome NEC D76.3
X NEC C96.6
acute (progressive) C96.0
chronic C96.6
multifocal C96.5
multisystemic C96.0
unifocal C96.6
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
