Cardiac arrhythmia, unspecified

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2007 Added to the draft code set draft Cardiac arrhythmia, unspecified

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from I49 Other cardiac arrhythmias

Excludes2 - not included here

bradycardia NOS (R00.1)
neonatal dysrhythmia (P29.1-)
sinoatrial bradycardia (R00.1)
sinus bradycardia (R00.1)
vagal bradycardia (R00.1)

Code first

cardiac arrhythmia complicating:
abortion or ectopic or molar pregnancy (O00-O07, O08.8)
obstetric surgery and procedures (O75.4)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Abnormal, abnormality, abnormalities > rhythm, heart
Arrhythmia
Rhythm > escape
Rhythm > disorder
Dysrhythmia > cardiac
Disorder > heart action
Action, heart > disorder
Rhythm > heart, abnormal
Action, heart > irregular
Disturbance > rhythm, heart
Irregular, irregularity > action, heart

Codes in the same group

Code	Description	Status
I49.0	Ventricular fibrillation and flutter	Not billable
I49.1	Atrial premature depolarization	Valid
I49.2	Junctional premature depolarization	Valid
I49.3	Ventricular premature depolarization	Valid
I49.4	Other and unspecified premature depolarization	Not billable
I49.5	Sick sinus syndrome	Valid
I49.8	Other specified cardiac arrhythmias	Not billable