D47.02 Systemic mastocytosis
The ICD-10-CM code for Systemic mastocytosis is D47.02 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Chapter
- 2: Neoplasms (C00-D49)
- Section
- D37-D48: Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
- Category D47
- 14 codes (11 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to D47.02:
- Disease, diseased › systemic tissue mast cell
- Mastocytosis › isolated bone marrow
- Mast cell › disease, systemic tissue
- Mastocytosis › indolent systemic
- Mastocytosis › systemic (indolent) (smoldering) › with an associated hematological non-mast cell lineage disease (SM-AHNMD)
Inclusion Terms
- Indolent systemic mastocytosis
- Isolated bone marrow mastocytosis
- Smoldering systemic mastocytosis
- Systemic mastocytosis, with an associated hematological non-mast cell lineage disease (SM-AHNMD)
U.S. Hospital Utilization
- An estimated 1,085 U.S. inpatient stays in 2023 included D47.02 among the documented diagnoses.
- 105 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Tx of primary site (TOC entry)a. Admission/Encounter for treatment of primary site ............................................................. 33
Tx of secondary site (TOC entry)b. Admission/Encounter for treatment of secondary site .......................................................... 33
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026