2027 ICD-10-CM Diagnosis Code I45.89Other specified conduction disorders
ICD-10-CM Codes›I00–I99›I30-I5A›I45
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
I45.89 is a billable ICD-10-CM diagnosis code for other specified conduction disorders. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 308 through 310, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 54 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Conduction disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Accelerated atrioventricular conduction
- Asymptomatic sinoatrial node dysfunction
- Atrial premature depolarization with aberrant ventricular conduction
- Atrial tachycardia
- Atrioventricular conduction disorder
- Atrioventricular dissociation
- Atrioventricular nodal function - finding
- AV junctional tachycardia
- AV node arrhythmia
- Chronotropic incompetence
- Concealed accessory pathway
- Dissociated atrioventricular nodal function
- Electro-mechanical dissociation caused by cardiac pacemaker
- Familial atrial tachyarrhythmia, infra-Hisian cardiac conduction disease
- Familial cardiomyopathy
- Familial dilated cardiomyopathy with conduction defect due to LMNA mutation
- Intraventricular conduction defect
- Malfunction from artificial pacing
- Nodal function - finding
- Nonparoxysmal AV nodal tachycardia
- Progressive familial heart block
- Progressive familial heart block, type IB
- Pulseless electrical activity
- Pulseless electrical activity with successful resuscitation
- Rhythm from artificial pacing
- Sinus node dysfunction
- Sinus node function - finding
- Supraventricular bigeminy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I45.89: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Atrioventricular [AV] dissociation
- Interference dissociation
- Isorhythmic dissociation
- Nonparoxysmal AV nodal tachycardia
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Arrhythmia
An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.
The full article covers:
- What is an arrhythmia?
- What causes an arrhythmia?
- What are the symptoms of an arrhythmia?
- How is an arrhythmia diagnosed?
- What are the treatments for an arrhythmia?
- Can arrhythmias be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I45.89 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I45.89Overview
What is the ICD-10 code for other specified conduction disorders?
The ICD-10-CM code for other specified conduction disorders is I45.89 (sometimes written as I4589). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I45.89 (Other specified conduction disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified conduction disorders on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I45.89 group to?
When other specified conduction disorders is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 309, 310, 308, with relative weights from 0.5686 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I45.89 a CC or MCC?
CMS lists I45.89 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 54 closely related codes in its exclusion list.
What is the ICD-9 equivalent of I45.89?
Under the General Equivalence Mappings, other specified conduction disorders converts to ICD-9-CM 426.89 (conduction disorder NEC). The mapping is a direct match.
