ICD-10-CM code · FY2027

I45.9 Conduction disorder, unspecified

BillableValid for claims as a specific diagnosis code

About I45.9

Code: I45.9
Billable: Yes
Short description: Conduction disorder, unspecified
Category: I45 Other conduction disorders
Block: I30-I5A Other forms of heart disease
Chapter: 9 Diseases of the circulatory system
Code set: FY2027, October 1, 2026 to September 30, 2027

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Coding notes for I45.9

Applicable to Other names for conditions reported with this code.

Heart block NOS
Stokes-Adams syndrome

Chapter 9 notes (apply to every code in it)

Excludes2 Not part of this condition, but a patient can have both: report both codes when both apply.

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.-)

Related codes in I45

I45.0 Right fascicular blockBillable
I45.1 Other and unspecified right bundle-branch blockHeader
I45.2 Bifascicular blockBillable
I45.3 Trifascicular blockBillable
I45.4 Nonspecific intraventricular blockBillable
I45.5 Other specified heart blockBillable
I45.6 Pre-excitation syndromeBillable
I45.8 Other specified conduction disordersHeader

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ICD-10-CM FY2027 code set, as published by the CDC National Center for Health Statistics (NCHS) and CMS, effective October 1, 2026 to September 30, 2027. Codes, titles and notes are shown as published. Check payer rules and the official guidelines before billing. This page is not medical advice.