ICD-10 Code L74.519 – Primary focal hyperhidrosis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L74.519 – Primary focal hyperhidrosis, unspecified
What it is
This code identifies primary focal hyperhidrosis, a condition of excessive sweating in a localized area without an underlying disease cause. Use it when the site is not specified in the documentation.
Clinical signs
Typical findings include recurrent, visible sweating that is greater than expected for the setting and may affect daily activities. Clinical features vary; refer to documentation.
When to use this code
Use L74.519 when the clinician documents primary focal hyperhidrosis and does not name a specific body site. It also fits notes describing localized excessive sweating with no secondary cause identified. Check documentation if the record suggests a different type or location.
Do not use for
Do not use this code for secondary hyperhidrosis caused by another condition or medication. Do not use it when a specific focal site is documented and another more precise code applies.
Coding tip
If the note says “primary focal hyperhidrosis” but omits the site, code the unspecified option and query only if clarification would change code selection.