ICD-10 Code G04.89 – Other myelitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G04.89 – Other myelitis
What it is
G04.89 identifies myelitis that is not described by a more specific ICD-10-CM code. It refers to inflammation of the spinal cord when the record supports myelitis but does not name another indexed type.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include spinal cord dysfunction such as weakness, sensory changes, gait difficulty, or bowel and bladder involvement.
When to use this code
Use G04.89 when the clinician documents myelitis and the available record does not support a more specific subtype. This may occur in problem lists, discharge summaries, or imaging-based assessments that confirm spinal cord inflammation without further detail.
Code it only when the documentation clearly supports myelitis and the coder cannot assign a more specific diagnosis from the chart. Check documentation if the cause, location, or type is stated elsewhere.
Do not use for
Do not use this code for encephalitis, meningitis, or other non-spinal inflammatory neurologic disorders. Also avoid it when a more specific myelitis code is documented.
Coding tip
Look for the exact wording “myelitis” and code the most specific documented type before defaulting to G04.89.