I45.4 Nonspecific intraventricular block

Billable ICD-10-CM code, FY2026.

Applicable to

• Bundle-branch block NOS

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 426.50 Bundle branch block, unspecified (approximate)

Diagnosis Index entries for I45.4

• Block, blocked › bundle-branch (complete) (false) (incomplete)
• Block, blocked › heart › bundle branch
• Block, blocked › intraventricular (nonspecific)

Nearby codes

• 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
• I45.3 Trifascicular block
• I45.4 Nonspecific intraventricular block (this code)
• I45.5 Other specified heart block
• I45.6 Pre-excitation syndrome
• I45.8 Other specified conduction disorders
• I45.81 Long QT syndrome
• I45.89 Other specified conduction disorders