Neonatal hypertension

This code signifies abnormally high blood pressure in a newborn infant, typically within the first 28 days of life. Neonatal hypertension can be primary (idiopathic) or secondary to underlying conditions such as renal disease, coarctation of the aorta, or complications from umbilical catheterization. It requires careful monitoring and management to prevent long-term cardiovascular and renal sequelae.

Apply this code when documentation explicitly states a diagnosis of hypertension in a neonate. This includes cases identified during routine newborn screenings, follow-up for risk factors, or evaluation for symptoms like irritability, poor feeding, or seizures. Supporting documentation should include blood pressure readings consistently above the 95th percentile for age, weight, and gestational age, along with the physician's diagnostic statement.

• Ensure the patient's age is within the neonatal period (0-28 days) for appropriate use of this code.
• Always look for and code any underlying cause of the neonatal hypertension, such as renal artery stenosis or renal parenchymal disease, as a secondary diagnosis.
• Do not confuse with transient hypertension in the newborn, which may resolve spontaneously and often does not warrant this specific diagnosis unless persistent.