ICD-10 Code F07.81 – Postconcussional syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F07.81 – Postconcussional syndrome
What it is
Postconcussional syndrome describes lingering symptoms after a concussion or other mild traumatic brain injury. You use this code when the record shows persistent effects after the initial head injury.
Clinical signs
Common features include headache, dizziness, memory problems, poor concentration, irritability, sleep disturbance, and fatigue. Clinical features vary; refer to documentation.
When to use this code
Use F07.81 when the provider documents postconcussional syndrome, postconcussion syndrome, or similar persistent sequelae after concussion. It may apply during follow-up visits when acute injury findings have resolved but symptoms continue. Check documentation for the specific relationship to the prior injury.
Do not use for
Do not use this code for an acute concussion, head injury without persistent symptoms, or unrelated neurologic complaints. If the note does not clearly support postconcussional syndrome, check documentation.
Coding tip
Link the diagnosis to the prior concussion in the record and code the acute injury separately only when appropriate.