E34.09
Other carcinoid syndrome
E34.09 (also written E3409) is a billable ICD-10-CM diagnosis code for other carcinoid syndrome. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 18 codes in category E34 (Other endocrine disorders). The Alphabetic Index lists it under 16 entries. 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.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Endocrine clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Hospital CC
Counts as a complication or comorbidity (CC) when reported as a secondary diagnosis on an inpatient claim. It does not count when the principal diagnosis is one of the 11 codes in its exclusion list. Some MS-DRGs also ignore a CC or MCC that defines the DRG.
Source: CMS MS-DRG Definitions Manual v44, effective October 1, 2026, Appendix CInclusion terms
Conditions classified to this code.
- Carcinoid disease NEC
- Carcinoid syndrome NEC
- Other carcinoid disease
Notes
Also from chapter/block level (1 note)
- 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.
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 16 entries
- Argentaffinoma, syndrome
- Björck (-Thorson) syndrome (malignant carcinoid)
- Cassidy (-Scholte) syndrome (malignant carcinoid)
- Disease, diseased, carcinoid, specified NEC
- Flush syndrome
- Scholte's syndrome (malignant carcinoid)
- Secretion, hormone, by, carcinoid tumor
- Syndrome, argentaffin, argintaffinoma
- Syndrome, Björck (-Thorsen)
- Syndrome, carcinoid, specified NEC
- Syndrome, Cassidy (-Scholte)
- Syndrome, flush