ICD-10 Code E34.09 – Other carcinoid syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E34.09 – Other carcinoid syndrome
What it is
E34.09 identifies carcinoid syndrome that does not fit a more specific ICD-10-CM code. It describes the systemic effects of a carcinoid tumor’s hormone secretion, rather than the tumor itself.
Clinical signs
Clinical features may include flushing, diarrhea, wheezing, and episodic palpitations. If documentation is incomplete, check documentation for the specific manifestations or the underlying tumor site.
When to use this code
Use E34.09 when the provider documents carcinoid syndrome and no more specific subtype is recorded. It may also apply when the record states “other carcinoid syndrome” or when the syndrome is present but the usual code options do not match.
Code the underlying carcinoid tumor separately when documented and supported by the record. If the note only mentions a neuroendocrine tumor without carcinoid syndrome, do not assign this code.
Do not use for
Do not use E34.09 for carcinoid tumor without syndrome, or for nonspecific flushing and diarrhea without documented carcinoid syndrome. Check documentation if the diagnosis is uncertain.
Coding tip
Verify that the record names carcinoid syndrome, not just a carcinoid tumor or neuroendocrine neoplasm.