ICD-10 Code I78.8 – Other diseases of capillaries (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I78.8 – Other diseases of capillaries
What it is
I78.8 identifies capillary disorders that do not fit a more specific ICD-10 category. Use it for documented capillary disease when the record does not name a better-defined vascular condition.
Clinical signs
Clinical features vary; refer to documentation. Capillary disorders may present with visible small-vessel changes, skin findings, or bleeding-related complaints, but you should code only what is specifically documented.
When to use this code
Use I78.8 when the clinician documents an “other” capillary disease or a capillary disorder without a more specific code. It may apply when the note confirms a capillary abnormality but does not identify hereditary hemorrhagic telangiectasia, nevus, or another listed diagnosis. Check documentation if the term is vague.
Do not use for
Do not use this code when a more specific capillary disorder is documented and indexed elsewhere in ICD-10-CM. Avoid it for nonspecific symptoms alone, such as bruising or bleeding, unless the provider links them to a capillary disease.
Coding tip
Code the exact documented capillary disorder first; use I78.8 only when no more specific option is supported.