FY2027 ICD-10-CM reference
E34.01: Carcinoid heart syndrome
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Carcinoid heart syndrome. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional 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.
Source: E00-E89 (chapter, inherited).
Excludes1
transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Source: E00-E89 (chapter, inherited).
Excludes1
galactorrhea (N64.3)
Source: E20-E35 (section, inherited).
Excludes1
gynecomastia (N62)
Source: E20-E35 (section, inherited).
Excludes1
pseudohypoparathyroidism (E20.1)
Source: E34 (category, inherited).
Code also
the underlying disorder, such as:
Source: E34.0 (self, inherited).
Code also
primary neuroendocrine tumors (C7A.-)
Source: E34.0 (self, inherited).
Code also
secondary neuroendocrine tumors (C7B.-)
Source: E34.0 (self, inherited).
Instructional note
Carcinoid heart disease
Source: E34.01 (self, direct).
Instructional note
Hedinger syndrome
Source: E34.01 (self, direct).
Compare the FY2027 additions, removals and billable-status changes
What does E34.01 mean in FY2027?
The official ICD-10-CM descriptor is Carcinoid heart syndrome. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is E34.01 billable in FY2027?
The FY2027 order file marks E34.01 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does E34.01 map to an HCC?
In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), E34.01 maps to CMS-HCC V28 HCC 17 (Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. ESRD, RxHCC, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition