ICD-10-CM Alphabetic Index · FY 2026 11 Entries
Mastocytosis in the ICD-10-CM Index ICD-10-CM
The main term Mastocytosis carries 11 index entries pointing to 6 ICD-10-CM codes. The default entry is D47.09, 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
11
Index Entries
6
Codes Referenced
D47.09
Default Code
M
Letter
11 of 11 shown
ICD-10-CM
Index Entries Under Mastocytosis 11 entries · 6 codes
Mastocytosis D47.09
aggressive systemic C96.21
cutaneous (diffuse) (maculopapular) D47.01
congenital Q82.2
of neonatal onset Q82.2
of newborn onset Q82.2
indolent systemic D47.02
isolated bone marrow D47.02
malignant C96.29
systemic (indolent) (smoldering)
with an associated hematological non-mast cell lineage disease (SM-AHNMD) D47.02
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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.
