ICD-10-CM 2027 diagnosis code
E34.09Other carcinoid syndrome
E34.09 is a valid, billable ICD-10-CM code for other carcinoid syndrome. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Flush syndrome, ICD-10 code for Björck syndrome, ICD-10 code for Cassidy syndrome, ICD-10 code for Scholte's syndrome.
Code last changed in FY2025 (effective October 1, 2024). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About E34.09
E34.09 is the ICD-10-CM diagnosis code for other carcinoid syndrome. It belongs to category E34 (other endocrine disorders), block E20-E35 (disorders of other endocrine glands) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within E34.0, choose E34.09 (Other carcinoid syndrome) only when documentation doesn't support a more specific option: unspecified (E34.00) and carcinoid heart syndrome (E34.01).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 643 (Endocrine Disorders with MCC, relative weight 1.6139), DRG 644 (Endocrine Disorders with CC, relative weight 1.0044) and DRG 645 (Endocrine Disorders without CC/MCC, relative weight 0.7459), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It was added in FY2025, effective October 1, 2024.
Coding notes
- Carcinoid disease NEC
- Carcinoid syndrome NEC
- Other carcinoid disease
Notes that apply from higher levels
Instructions written at a parent level also apply to E34.09.
› From E34.0 Carcinoid syndrome
› From E34 Other endocrine disorders
- pseudohypoparathyroidism (E20.1)
Broader instructions also apply from E20-E35 Disorders of other endocrine glands and Chapter 4: Endocrine, nutritional and metabolic diseases.
Alphabetic index entries
16 entriesTerms in the official ICD-10-CM index that lead to E34.09.
- 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
- Syndrome › intestinal › carcinoid
- Syndrome › Scholte's
- Syndrome › Thorson-Björck
- Thorson-Björck syndrome
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2025 (effective 10/1/2024): Added
- No changes since FY2025.
Common questions about E34.09
Is E34.09 billable?
- Yes. E34.09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E34.09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E34.09 as a principal diagnosis.
Is E34.09 a CC or MCC?
- E34.09 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does E34.09 group to?
- E34.09 is used in the MS-DRG v44.0 logic for MS-DRG 643 (Endocrine Disorders with MCC), MS-DRG 644 (Endocrine Disorders with CC) and MS-DRG 645 (Endocrine Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.