ICD-10 Code E34.0 – Carcinoid syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E34.0 – Carcinoid syndrome
What it is
E34.0 identifies carcinoid syndrome, a hormone-related condition caused by a neuroendocrine tumor releasing active substances into the bloodstream. Use it when the record specifically documents carcinoid syndrome.
Clinical signs
Common findings include flushing, diarrhea, wheezing, and episodic abdominal cramping. Clinical features vary; refer to documentation for the confirmed syndrome.
When to use this code
Use E34.0 when the provider diagnoses carcinoid syndrome or clearly documents symptoms attributed to hormone secretion from a carcinoid tumor. It may appear in follow-up, evaluation, or problem-list documentation. Code the underlying tumor separately when documented.
Do not use for
Do not use this code for a carcinoid tumor without documented syndrome. Also avoid it when symptoms are present but the diagnosis remains unconfirmed; check documentation.
Coding tip
Look for explicit wording such as “carcinoid syndrome” before assigning E34.0.