I45.5 Other specified heart block

Billable ICD-10-CM code, FY2026.

Applicable to

• Sinoatrial block
• Sinoauricular block

Excludes1 (never code together)

• heart block NOS (I45.9)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 426.6 Other heart block

Diagnosis Index entries for I45.5

• Arborization block (heart)
• Arrest, arrested › sinus
• Block, blocked › arborization (heart)
• Block, blocked › heart › specified type NEC
• Block, blocked › nodal
• Block, blocked › sinoatrial
• Block, blocked › sinoauricular
• Sinus › arrest
• Sinus › pause
• Standstill › auricular
• Standstill › sinoatrial

Nearby codes

• 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
• I45.5 Other specified heart block (this code)
• I45.6 Pre-excitation syndrome
• I45.8 Other specified conduction disorders
• I45.81 Long QT syndrome
• I45.89 Other specified conduction disorders
• I45.9 Conduction disorder, unspecified