Paroxysmal tachycardia (I47) ICD-10-CM
The I47 code range covers paroxysmal tachycardia with 11 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
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.
Codes in the I47 Range 11 codes · 8 billable
- I47 Paroxysmal tachycardiaNon-billable
- I47.0 Re-entry ventricular arrhythmia
- I47.1 Supraventricular tachycardiaNon-billable
- I47.10 Supraventricular tachycardia, unspecified
- I47.11 Inappropriate sinus tachycardia, so stated
- I47.19 Other supraventricular tachycardia
- I47.2 Ventricular tachycardiaNon-billable
- I47.20 Ventricular tachycardia, unspecified
- I47.21 Torsades de pointes
- I47.29 Other ventricular tachycardia
- I47.9 Paroxysmal tachycardia, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the I47 range.
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.
About the I47 Code Range
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.
Questions About This Page
How many billable codes are in the I47 range?
Of the 11 codes in this range, 8 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the I47 range classify?
The range classifies paroxysmal tachycardia. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
