R00.0 Tachycardia, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

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

Excludes1 (never code together)

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

Applies from R00 Abnormalities of heart beat

Excludes1 (never code together)

• abnormalities originating in the perinatal period (P29.1-)

Excludes2 (not included here)

• specified arrhythmias (I47-I49)

MS-DRG index

Defines the logic of DRG(s) 308-310 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 785.0 Tachycardia, unspecified

Code annotations containing back-references to R00.0

Back-references to R00.0

• Type 1 Excludes: I47 Paroxysmal tachycardia ("tachycardia NOS (R00.0)")
• Type 1 Excludes: I47 Paroxysmal tachycardia ("sinoauricular tachycardia NOS (R00.0)")
• Type 1 Excludes: I47 Paroxysmal tachycardia ("sinus [sinusal] tachycardia NOS (R00.0)")

Diagnosis Index entries for R00.0

• Fast pulse
• Heart beat › rapid
• Pulse › fast
• Pulse › rapid
• Rapid › heart (beat)
• Sinus › tachycardia
• Tachycardia
• Tachycardia › sinoauricular NOS
• Tachycardia › sinus [sinusal] NOS

Nearby codes

• R00 Abnormalities of heart beat
• R00.0 Tachycardia, unspecified (this code)
• R00.1 Bradycardia, unspecified
• R00.2 Palpitations
• R00.8 Other abnormalities of heart beat
• R00.9 Unspecified abnormalities of heart beat