ICD-10-CM 2027
ICD-10 code for tachycardia sinus
From the official ICD-10-CM alphabetic index entry “Sinus › tachycardia”. Page updated September 29, 2026.
About coding tachycardia sinus
The ICD-10-CM code for tachycardia sinus is R00.0 (Tachycardia, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on R00.0.
Within R00, choose R00.0 (Tachycardia, unspecified) only when documentation doesn't support a more specific option: bradycardia, unspecified (R00.1), Palpitations (R00.2), other abnormalities of heart beat (R00.8) and unspecified abnormalities of heart beat (R00.9).
Don't report R00.0 together with the conditions in its Excludes1 note: inappropriate sinus tachycardia, so stated (I47.11), neonatal tachycardia (P29.11) and paroxysmal tachycardia (I47.-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific tachycardia sinus codes (official index)
- paroxysmal I47.19 — Other supraventricular tachycardia
Don't confuse with (Excludes1 for R00.0)
Common questions about tachycardia sinus ICD-10 codes
What is the ICD-10 code for tachycardia sinus?
- R00.0 — Tachycardia, unspecified. More specific codes apply when the documentation supports them: I47.19.
What is the ICD-10 code for paroxysmal tachycardia sinus?
- I47.19 — Other supraventricular tachycardia.
Is R00.0 billable?
- Yes. R00.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R00.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R00.0 as a principal diagnosis.
Is R00.0 a CC or MCC?
- No. R00.0 is neither a CC nor an MCC under MS-DRG v44.0.