I45.2 Bifascicular block

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

MS-DRG index

Defines the logic of DRG(s) 308-310 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 426.51 Right bundle branch block and left posterior fascicular block (approximate)
• 426.52 Right bundle branch block and left anterior fascicular block (approximate)
• 426.53 Other bilateral bundle branch block (approximate)

Diagnosis Index entries for I45.2

• Block, blocked › bifascicular (cardiac)
• Block, blocked › bundle-branch (complete) (false) (incomplete) › bilateral
• Block, blocked › bundle-branch (complete) (false) (incomplete) › left › with right bundle branch block
• Block, blocked › bundle-branch (complete) (false) (incomplete) › left › incomplete › with right bundle branch block
• Block, blocked › bundle-branch (complete) (false) (incomplete) › right › with › left bundle branch block
• Block, blocked › bundle-branch (complete) (false) (incomplete) › right › with › left fascicular block
• Block, blocked › heart › bundle branch › bilateral
• Block, blocked › intraventricular (nonspecific) › bundle branch › bilateral

Nearby codes

• I45 Other conduction disorders
• I45.0 Right fascicular block
• I45.1 Other and unspecified right bundle-branch block
• I45.10 Unspecified right bundle-branch block
• I45.19 Other right bundle-branch block
• I45.2 Bifascicular block (this code)
• I45.3 Trifascicular block
• I45.4 Nonspecific intraventricular block
• I45.5 Other specified heart block
• I45.6 Pre-excitation syndrome
• I45.8 Other specified conduction disorders