R00Header code — not billable

Abnormalities of heart beat

Chapter
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Category
R00
Effective date
October 1, 2026

Related codes in category R00

R00.0Tachycardia, unspecifiedYesR00.1Bradycardia, unspecifiedYesR00.2PalpitationsYesR00.8Other abnormalities of heart beatYesR00.9Unspecified abnormalities of heart beatYes

Frequently asked questions

What is ICD-10 code R00?

R00 is an ICD-10-CM diagnosis code for Abnormalities of heart beat.

Is R00 a billable code?

No. R00 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is R00 in?

R00 falls under Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

When did R00 become effective?

R00 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to R00?

R00 belongs to category R00, which includes 5 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.