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G04.00

Billable

Acute disseminated encephalitis and encephalomyelitis, unspecified

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Sudden inflammation of the brain and spinal cord affecting multiple areas, occurring without a known specific trigger.

Coding Tips

  • •Distinguish between postinfectious ADEM (G04.01) and other causes of acute disseminated encephalitis
  • •Document the extent of involvement (brain, spinal cord, or both) in clinical notes

Code Hierarchy

└G04Encephalitis, myelitis and encephalomyelitis└G04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)└G04.00Acute disseminated encephalitis and encephalomyelitis, unspecified
└G04.00Acute disseminated encephalitis and encephalomyelitis, unspecified

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