E34.0

Carcinoid syndrome

FY2027Chapter 4: Endocrine, nutritional and metabolic diseases/E20–E35 Disorders of other endocrine glands

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

E34.0 is a non-billable ICD-10-CM code header for carcinoid syndrome. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are E34.00 Carcinoid syndrome, unspecified; E34.01 Carcinoid heart syndrome and E34.09 Other carcinoid syndrome. Its coding notes include a Code also instruction and 4 Excludes1 entries.

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

This code
  • the underlying disorder, such as:
    • primary neuroendocrine tumors (C7A.-)
    • secondary neuroendocrine tumors (C7B.-)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from E34 Other endocrine disorders
  • pseudohypoparathyroidism (E20.1)
Also from chapter/block level (3 notes)
Inherited from E20–E35 Disorders of other endocrine glands
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Notes

Also from chapter/block level (1 note)
Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

More specific codes under E34.0 3