ICD-10-CM 2027
ICD-10 code for Chronotropic incompetency
From the official ICD-10-CM alphabetic index entry “Incompetency, incompetent, incompetence › chronotropic”. Page updated September 29, 2026.
About coding Chronotropic incompetency
The ICD-10-CM code for Chronotropic incompetency is I45.89 (Other specified conduction disorders). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I45.89.
Within I45.8, choose I45.89 (Other specified conduction disorders) only when documentation doesn't support a more specific option: long QT syndrome (I45.81).
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 308 (Cardiac Arrhythmia and Conduction Disorders with MCC, relative weight 1.1806), DRG 309 (Cardiac Arrhythmia and Conduction Disorders with CC, relative weight 0.7316), DRG 310 (Cardiac Arrhythmia and Conduction Disorders without CC/MCC, relative weight 0.568), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 05 (Diseases and Disorders of the Circulatory System) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Chronotropic incompetency codes (official index)
- with
- autonomic dysfunction G90.89 — Other disorders of autonomic nervous system
- ischemic heart disease I25.89 — Other forms of chronic ischemic heart disease
- left ventricular dysfunction I51.89 — Other ill-defined heart diseases
- sinus node dysfunction I49.89 — Other specified cardiac arrhythmias not elsewhere classified
Common questions about Chronotropic incompetency ICD-10 codes
What is the ICD-10 code for Chronotropic incompetency?
- I45.89 — Other specified conduction disorders. More specific codes apply when the documentation supports them: G90.89, I25.89, I51.89, I49.89.
Is I45.89 billable?
- Yes. I45.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I45.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I45.89 as a principal diagnosis.
Is I45.89 a CC or MCC?
- I45.89 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.