Abnormalities of heart beat
In Symptoms and signs involving the circulatory and respiratory systems (R00-R09), chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
5 billable codes under R00: none are a CC or MCC; none map to an HCC.
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers when to report symptom, sign, and abnormal finding codes (R00-R99), plus specific rules for falls, coma scales, non-infectious SIRS, death NOS, and NIHSS scores.
- Use of symptom codes (page 75)
- Use of a symptom code with a definitive diagnosis code (page 75)
- Combination codes that include symptoms (page 75)
- Repeated falls (page 76)
- Coma (page 76)
- Functional quadriplegia (page 76)
- SIRS due to Non-Infectious Process (page 77)
- Death NOS (page 77)
All codes under R00
R00 can't be used on a claim. Pick a billable code below; grey headings group them.
R00 MS-DRGs
As the principal diagnosis, the billable codes under R00 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 308 Cardiac Arrhythmia and Conduction Disorders with MCC (3 of 5 codes)
- DRG 309 Cardiac Arrhythmia and Conduction Disorders with CC (3 of 5 codes)
- DRG 310 Cardiac Arrhythmia and Conduction Disorders without CC/MCC (3 of 5 codes)
- DRG 314 Other Circulatory System Diagnoses with MCC (2 of 5 codes)
- DRG 315 Other Circulatory System Diagnoses with CC (2 of 5 codes)
- DRG 316 Other Circulatory System Diagnoses without CC/MCC (2 of 5 codes)
- DRG 791 Prematurity with Major Problems (1 of 5 codes)
- DRG 793 Full Term Neonate with Major Problems (1 of 5 codes)
Other codes that refer to R00
Notes on these codes point to R00.
- CH10 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH11 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH12 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH13 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH14 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH3 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH5 Excludes2: symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
- CH6 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH7 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH8 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- CH9 Excludes2: symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Arrhythmia
An arrhythmia is a problem with the rate or rhythm of your heartbeat. Your heart beats too quickly, too slowly, or with an irregular pattern. Changes in the electrical signals that control your heartbeat cause arrhythmias.
Read more about arrhythmia on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.