ICD-10 Code D18.00 – Hemangioma unspecified site (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D18.00 – Hemangioma unspecified site
What it is
D18.00 identifies a hemangioma when the site is not specified in the medical record. It is a benign vascular lesion made of blood vessels, but the exact location must be unclear or undocumented.
Clinical signs
Clinical features vary; refer to documentation. Hemangiomas are usually described as a red, blue, or purple vascular mass or skin lesion, and the record should support a benign vascular growth rather than another tumor.
When to use this code
Use D18.00 when the provider documents hemangioma but does not identify the anatomic site. This code fits records where the lesion is confirmed as a hemangioma, yet the location is missing, vague, or not available in the note.
If laterality or site is documented elsewhere, code the more specific hemangioma code instead. Check documentation carefully before defaulting to an unspecified code.
Do not use for
Do not use this code for vascular malformations, malignant vascular tumors, or lesions with a clearly documented site that should be coded more specifically. Check documentation if the lesion type is uncertain.
Coding tip
Query for the exact site whenever the note only says “hemangioma,” because a more specific code may be available.