I45.9
Conduction disorder, unspecified
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 8 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 10 never code together
I00-I99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
- systemic connective tissue disorders (M30-M36)M30-M36
- transient cerebral ischemic attacks and related syndromes (G45.-)G45.-
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
I45.9code
Inclusion terms
- Heart block NOS
- Stokes-Adams syndrome
Index entries leading here 13
- Attack, attacks
- Syndrome — see also Disease
- Adams-Stokes (-Morgagni) disease or syndrome I45.9
- Disease, diseased — see also Syndrome
- Arrhythmia (auricle)(cardiac)(juvenile)(nodal)(reflex)(supraventricular)(transitory)(ventricle) I49.9
- block I45.9
- Block, blocked
- Delay, delayed
- conduction (cardiac) (ventricular) I45.9
- Defect, defective Q89.9
- conduction (heart) I45.9
- Disorder (of) — see also Disease
- conduction, heart I45.9
- Dropped heart beats I45.9
- Morgagni-Stokes-Adams syndrome I45.9
- Spens' syndrome (syncope with heart block) I45.9
- Stokes-Adams disease or syndrome I45.9
Alongside this code 8 same parent — I45
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.