ICD-10 Code L74.2 – Miliaria profunda (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L74.2 – Miliaria profunda
What it is
Miliaria profunda is a deeper form of heat rash caused by blocked sweat ducts. It is less common than other miliaria types and reflects sweat retention in deeper skin layers.
Clinical signs
Clinical features vary; refer to documentation. It typically presents as firm, flesh-colored papules after repeated heat exposure or heavy sweating, often with little redness or itching.
When to use this code
Use L74.2 when the record specifically documents miliaria profunda, deep sweat-duct obstruction, or deep heat rash. Code it when the clinician identifies this subtype rather than a general rash or unspecified miliaria. If documentation only says “heat rash,” check documentation for the exact form.
Do not use for
Do not use this code for simple nonspecific dermatitis, allergic rashes, or other clearly identified skin eruptions. If the note does not confirm miliaria profunda, check documentation.
Coding tip
Assign L74.2 only when the provider names the deep form of miliaria; otherwise, query or code the documented rash diagnosis.