R00.0

ICD-10Billable

Tachycardia, unspecified

Official ICD-10-CM descriptor (FY2026)

Tachycardia, unspecified

R00.0 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

Rapid heart beat
Sinoauricular tachycardia NOS
Sinus [sinusal] tachycardia NOS

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

inappropriate sinus tachycardia, so stated (I47.11)
neonatal tachycardia (P29.11)
paroxysmal tachycardia (I47.-)

Related codes in R00

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Symptoms and signs involving the circulatory and respiratory systems (R00-R09)
Parent code: R00

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.