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I47.9

I47.9: Paroxysmal tachycardia, unspecified

Billable / specific codeICD-10-CM

I47.9 is a billable, specific ICD-10-CM code for paroxysmal tachycardia, unspecified. It is valid for submission on a claim.

Check I47.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Bouveret (-Hoffman) syndrome

Excludes1 inherited from the categories above I47.9

A category’s note binds every code beneath it.

Written on I47: Paroxysmal tachycardia

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

Other codes that can never be billed with I47.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • R00.0Tachycardia, unspecified

Risk adjustment

I47.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 238 Specified Heart Arrhythmias0.299 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

I47.9 is named in 24 Medicare coverage policies: 24 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
  • A54831Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemaker
  • A54909Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers
  • A54926Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers

Alphabetic index entries that lead here

  • Bouveret(-Hoffmann) syndrome (paroxysmal tachycardia)
  • Hoffmann-Bouveret syndrome
  • Disease, diseased›Bouveret(-Hoffmann) (paroxysmal tachycardia)
  • Syndrome›Bouveret(-Hoffman)
  • Tachycardia›paroxysmal(sustained) (nonsustained)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I47

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.