ICD-10 Code L74.52 – Secondary focal hyperhidrosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L74.52 – Secondary focal hyperhidrosis
What it is
Secondary focal hyperhidrosis is excessive sweating limited to specific body areas and caused by an underlying condition or factor. You use this code when the sweating is not primary and the cause is documented or suspected.
Clinical signs
Clinical features vary; refer to documentation. Typical notes describe localized, recurrent sweating that is more than expected for the setting and may affect the palms, soles, underarms, or face.
When to use this code
Use this code when the record clearly identifies focal hyperhidrosis as secondary to another medical condition, medication, or other documented cause. It also fits when the clinician documents localized sweating as the secondary diagnosis and does not describe generalized sweating.
If the cause is not stated, you may need to check documentation before assigning the code. Code the documented underlying condition separately when appropriate.
Do not use for
Do not use this code for primary focal hyperhidrosis or for generalized sweating without a focal pattern. Check documentation if the record only says “diaphoresis” or does not specify a secondary cause.
Coding tip
Look for a documented cause first; if the source of sweating is unclear, verify it before coding L74.52.