I47.21

Torsades de pointes

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC238

Specified Heart Arrhythmias

CMS-HCC ESRD V24

HCC96

Specified Heart Arrhythmias

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

This code · I47.21
Use additional

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Code also

, if applicable, long QT syndrome (I45.81)

Inherited from I47Paroxysmal tachycardia
Excludes 1

tachycardia NOS (R00.0) sinoauricular tachycardia NOS (R00.0) sinus [sinusal] tachycardia NOS (R00.0)

Code first

tachycardia complicating: abortion or ectopic or molar pregnancy (O00-O07, O08.8) obstetric surgery and procedures (O75.4)

Inherited from chapter 9Diseases of the circulatory system
Excludes 2

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.-)

Official Guidelines for I47.21

FY 2026 ›
I.C.9Chapter-specific guidanceChapter 9: Diseases of the Circulatory System (I00-I99)

Subsections

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