ICD-10 Code D17.21 – Benign lipomatous neoplasm of skin and subcutaneous tissue of right arm (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D17.21 – Benign lipomatous neoplasm of skin and subcutaneous tissue of right arm
What it is
This code identifies a benign fatty tumor located in the skin or subcutaneous tissue of the right arm. It indicates a noncancerous lipomatous growth documented on the right upper limb.
Clinical signs
Typical findings include a soft, mobile, usually painless mass beneath the skin. Clinical features vary; refer to documentation for size, depth, and whether the lesion is symptomatic.
When to use this code
Use this code when the provider documents a benign lipoma or other benign lipomatous neoplasm specifically in the skin or subcutaneous tissue of the right arm. It is also appropriate when the record clearly identifies the right arm location and benign nature. Check documentation if the site is described only as upper limb or arm without laterality.
Do not use for
Do not use it for malignant soft tissue tumors, unspecified lipomas without right-arm location, or lesions in deeper tissues. If the documentation is unclear, check documentation.
Coding tip
Confirm both laterality and anatomic depth before assigning D17.21.