2027 ICD-10-CM Diagnosis Code I47.10Supraventricular tachycardia, unspecified

ICD-10-CM Codes›I00–I99›I30-I5A›I47

ICD-10-CM I47.10
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I47.10 is a billable ICD-10-CM diagnosis code for supraventricular tachycardia, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 308 through 310. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 54 closely related codes. Coders also document this condition as EKG: supraventricular tachycardia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cardiac dysrhythmias.

I47.10 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 96 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 96, ESRD (V21) category 96, ESRD (V24) category 96, and RxHCC Part D (V08) category 193 for payment year 2027.

Code Identity

ICD-10-CM Code
I47.10
Billable Status
Yes — Valid for Submission
Code Describes
Supraventricular tachycardia, unspecified
Short Description
Supraventricular tachycardia, unspecified
Same as the full description in the CMS dataset.
Parent Code
I47.1
Supraventricular tachycardia

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI47Paroxysmal tachycardia
This CodeI47.10Supraventricular tachycardia, unspecified

Medicare Risk Adjustment (HCC)Billing

I47.10 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
Dropped in V28 see all codes that no longer risk-adjust
Prior Model (CMS-HCC V24)
HCC 96
V24 retired last contributed to a Medicare Advantage risk score in payment year 2025
Other CMS Models
PACE (CMS-HCC V22): HCC 96 · ESRD (V21): HCC 96 · ESRD (V24): HCC 96
ESRD V21 weights: 0.093 dialysis, 0.247–0.303 functioning graft · ESRD V24 weights: 0.049 dialysis, 0.227–0.346 functioning graft
Part D (RxHCC)
RxHCC 193 — Atrial Arrhythmias
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • EKG: supraventricular tachycardia
  • Nonsustained paroxysmal supraventricular tachycardia
  • Paroxysmal supraventricular tachycardia
  • Supraventricular tachycardia
  • Supraventricular tachycardia following acute myocardial infarction
  • Supraventricular tachycardia with functional bundle branch block

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I47.10: its own notes plus those printed at I47 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From I47 Paroxysmal tachycardia applies to 9 codes
  • tachycardia NOS (R00.0)
  • sinoauricular tachycardia NOS (R00.0)
  • sinus [sinusal] tachycardia NOS (R00.0)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • 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.-)

Code First

The underlying condition named in the note is sequenced before this code.

From I47 Paroxysmal tachycardia applies to 9 codes
  • tachycardia complicating:
  • abortion or ectopic or molar pregnancy (O00-O07, O08.8)
  • obstetric surgery and procedures (O75.4)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I47.10, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I47.10: they are not reported together with it, unless the two conditions are unrelated.

  • R00.0 Tachycardia, unspecified
    paroxysmal tachycardia (I47.-) names I47.-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming I47.10: its condition is not part of those codes, and both may be reported when the patient has both.

  • R00 Abnormalities of heart beat
    specified arrhythmias (I47-I49) names I47-I49, which includes this code

Code First 2

These codes say to code first a condition named in the note, and I47.10 is one of the conditions named.

  • I5A Non-ischemic myocardial injury (non-traumatic)
    paroxysmal tachycardia (I47.-) names I47.-, which includes this code
  • I21.A1 Myocardial infarction type 2
    paroxysmal tachycardia (I47.0-I47.9) names I47.0-I47.9, which includes this code

Code Also 1

These codes say I47.10 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • M35.81 Multisystem inflammatory syndrome
    cardiac arrhythmia (I47-I49.-) names I47-I49, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR017
Cardiac dysrhythmias
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Tachycardia, Supraventricular

    a generic expression for any tachycardia that originates above the bundle of his.

Patient EducationClinical

Arrhythmia

An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.

The full article covers:

  • What is an arrhythmia?
  • What causes an arrhythmia?
  • What are the symptoms of an arrhythmia?
  • How is an arrhythmia diagnosed?
  • What are the treatments for an arrhythmia?
  • Can arrhythmias be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code History & ChangesHistory

Replacement I47.10 replaces the following previously assigned code(s):

  • I47.1 - Supraventricular tachycardia
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I47.10Overview

What is the ICD-10 code for supraventricular tachycardia, unspecified?

The ICD-10-CM code for supraventricular tachycardia, unspecified is I47.10 (sometimes written as I4710). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I47.10 (Supraventricular tachycardia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report supraventricular tachycardia, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I47.10 group to?

When supraventricular tachycardia, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 309, 310, 308, with relative weights from 0.5686 to 1.1809 depending on complications. Higher weights mean higher Medicare reimbursement.

Is I47.10 a CC or MCC?

CMS lists I47.10 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 54 closely related codes in its exclusion list.

Can I47.10 be reported with R00.0?

Not as a rule. The Excludes1 note at I47, which applies to I47.10, lists "tachycardia NOS (R00.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does I47.10 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage. I47.10 mapped to HCC 96 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 96 (Specified Heart Arrhythmias), ESRD (V21) category 96 (Specified Heart Arrhythmias), ESRD (V24) category 96 (Specified Heart Arrhythmias), and RxHCC Part D (V08) category 193 (Atrial Arrhythmias).