I49.8: Other specified cardiac arrhythmias

No longer billable · FY2027

Not billable: this is a header. Use one of the more specific codes below.

• No longer billable from October 1, 2026: it became a header for more specific codes: I49.81, I49.82, I49.89.

Code breakdown

Coding notes

Excludes2 (from I49)

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

Code first (from I49)

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

Codes under I49.8

• I49.81 Brugada syndrome
• I49.82 Ventricular bigeminy
• I49.89 Other specified cardiac arrhythmias not elsewhere classified

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All FY2027 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.