D47.01 Cutaneous mastocytosis

The ICD-10-CM code for Cutaneous mastocytosis is D47.01 (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 D47.01:

• Mastocytosis › cutaneous (diffuse) (maculopapular)
• Urticaria › pigmentosa
• Mastocytoma (extracutaneous) › solitary
• Telangiectasia, telangiectasis (verrucous) › macularis eruptiva perstans

Inclusion Terms

• Diffuse cutaneous mastocytosis
• Maculopapular cutaneous mastocytosis
• Solitary mastocytoma
• Telangiectasia macularis eruptiva perstans
• Urticaria pigmentosa

U.S. Hospital Utilization

• An estimated 270 U.S. inpatient stays in 2023 included D47.01 among the documented diagnoses.

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

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)