2026
ICD-10-CM
Diagnosis
Code

D47.0 Mast cell neoplasms of uncertain behavior

  • Non-billable
  • 2016–2026

D47.0 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Mast cell neoplasms of uncertain behavior.

Type 1 excludes

  • Congenital cutaneous mastocytosis (Q82.2)

  • Histiocytic neoplasms of uncertain behavior (D47.Z9)

  • Malignant mast cell neoplasm (C96.2-)

Codes

Versions

  1. 2026

    No changes

  2. 2025

    No changes

  3. 2024

    No changes

  4. 2023

    No changes

  5. 2022

    No changes

  6. 2021

    No changes

  7. 2020

    No changes

  8. 2019

    Code changed

    • Type 1 excludes

        • congenital cutaneous mastocytosis (Q82.2-)
        • histiocytic neoplasms of uncertain behavior (D47.Z9)
        • malignant mast cell neoplasm (C96.2-)
        • congenital cutaneous mastocytosis (Q82.2)
        • histiocytic neoplasms of uncertain behavior (D47.Z9)
        • malignant mast cell neoplasm (C96.2-)

  9. 2018

    Code changed

    • Type 1 excludes

        • malignant mast cell tumor (C96.2)
        • mastocytosis (congenital) (cutaneous) (Q82.2)
        • congenital cutaneous mastocytosis (Q82.2-)
        • histiocytic neoplasms of uncertain behavior (D47.Z9)
        • malignant mast cell neoplasm (C96.2-)

    • Description

        • Histiocytic and mast cell tumors of uncertain behavior
        • Mast cell neoplasms of uncertain behavior

    • Inclusion term

        • Indolent systemic mastocytosis
        • Mast cell tumor NOS
        • Mastocytoma NOS

    • Short description

        • Histiocytic and mast cell tumors of uncertain behavior
        • Mast cell neoplasms of uncertain behavior

  10. 2017

    No changes

  11. 2016

    New code