Alphabetic Index FY2027

I44

Atrioventricular and left bundle-branch block

FY2027Chapter 9: Diseases of the circulatory system/I30–I5A Other forms of heart disease

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

I44 is a non-billable ICD-10-CM code category for atrioventricular and left bundle-branch block. 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 I44.0 Atrioventricular block, first degree; I44.1 Atrioventricular block, second degree; I44.2 Atrioventricular block, complete; I44.3 Other and unspecified atrioventricular block and 4 more. Its coding notes include 10 Excludes2 entries.

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

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.-)

More specific codes under I44 8