Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes R00-R99 – Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) > 2024 ICD-10-CM Codes R00-R09 – Symptoms and signs involving the circulatory and respiratory systems (R00-R09) > 2024 ICD-10-CM Codes R03 – Abnormal blood-pressure reading, without diagnosis (R03)