I49.8
Other specified cardiac arrhythmias
Non-billable headerNot valid on its own. Use one of the more specific codes under it.
I49.8 is a non-billable ICD-10-CM code header for other specified cardiac arrhythmias. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I49.81 Brugada syndrome, I49.82 Ventricular bigeminy and I49.89 Other specified cardiac arrhythmias not elsewhere classified. Its coding notes include a Code first instruction and 15 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Inherited from I49 Other cardiac arrhythmias
Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
- 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.-)