Paroxysmal tachycardia (I47) ICD-10-CM
The I47 code range covers paroxysmal tachycardia with 12 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, 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 12 codes · 9 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
- I47.22 Catecholaminergic polymorphic ventricular tachycardia [CPVT] New
- 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.
Inappropriate Sinus Tachycardia by ECG Finding
An electrocardiographic finding of supraventricular tachycardia involving the sinus node in which a patient has an atypically high heart rate which cannot be explained by factors such as fever, exercise, hypovolemia, etc.
Polymorphic Catecholaminergic Ventricular Tachycardia
An arrhythmogenic disorder of the heart characterized by irregular heart rhythms in response to physical activity, stress, or catecholamine infusion, often transitioning into VENTRICULAR FIBRILLATION.
Tachycardia, Paroxysmal
Abnormally rapid heartbeats with sudden onset and cessation.
Tachycardia, Supraventricular
A generic expression for any tachycardia that originates above the BUNDLE OF HIS.
Tachycardia, Ventricular
An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).
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
Paroxysmal tachycardia means abnormally fast heartbeats that begin and end suddenly.
The subdivisions separate re-entry ventricular arrhythmia (I47.0), supraventricular tachycardia (I47.1), and ventricular tachycardia (I47.2). I47.9 leaves the type unspecified.
The supraventricular branch distinguishes unspecified, inappropriate sinus, and other types. The ventricular branch distinguishes unspecified, torsades de pointes, catecholaminergic polymorphic, and other types.
FY 2027 changes: The FY 2027 ICD-10-CM update, effective October 1, 2026, added I47.22.
Questions About This Page
How many billable codes are in the I47 range?
Of the 12 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. 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 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
