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  3. I00–I99
  4. I30-I5A
  5. Paroxysmal tachycardia (I47)

Paroxysmal tachycardia (I47)

ICD-10 code section I47 is used to classify various forms of paroxysmal tachycardia, a condition characterized by sudden episodes of rapid heart rate. These codes cover specific types of rapid heart rhythms originating in different parts of the heart, helping healthcare professionals accurately identify and document the exact arrhythmia type.

This section includes codes for re-entry ventricular arrhythmia (I47.0), also known as bundle branch reentrant ventricular tachycardia, and several categories of supraventricular tachycardia such as unspecified (I47.10) and inappropriate sinus tachycardia (I47.11). The detailed subcategories (e.g., I47.19) list many specialized forms of supraventricular tachycardia, helping coders distinguish among complex arrhythmias. Additionally, ventricular tachycardia has its own codes including unspecified (I47.20), torsades de pointes (I47.21), and other types (I47.29), with synonyms like “idiopathic ventricular tachycardia” and “polymorphic ventricular tachycardia” guiding correct code selection. The unspecified paroxysmal tachycardia category (I47.9) covers cases without precise classification. Using the ICD-10 code for paroxysmal tachycardia supports effective clinical communication and targeted treatment planning for these cardiac dysrhythmias.

Instructional Notations

Code First

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.

  • tachycardia complicating:
  • abortion or ectopic or molar pregnancy O00 O07 O08.8
  • obstetric surgery and procedures O75.4

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • tachycardia NOS R00.0
  • sinoauricular tachycardia NOS R00.0
  • sinus [sinusal] tachycardia NOS R00.0

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Torsades de Pointes

A malignant form of polymorphic ventricular tachycardia that is characterized by HEART RATE between 200 and 250 beats per minute, and QRS complexes with changing amplitude and twisting of the points. The term also describes the syndrome of tachycardia with prolonged ventricular repolarization, long QT intervals exceeding 500 milliseconds or BRADYCARDIA. Torsades de pointes may be self-limited or may progress to VENTRICULAR FIBRILLATION.