Measles complicated by meningitis

This code signifies a diagnosis of measles where meningitis has developed as a direct complication of the viral infection. It indicates a severe manifestation of measles affecting the central nervous system, specifically the meninges.

Use this code when documentation clearly states a patient has measles and is also diagnosed with meningitis directly attributed to the measles virus. This typically involves a patient presenting with classic measles symptoms followed by neurological signs such as headache, stiff neck, and altered mental status, with diagnostic confirmation of both conditions.

• Ensure documentation explicitly links the meningitis as a complication of measles, not a co-occurring but unrelated condition.
• Do not use this code if the meningitis is due to a different etiology, even if measles is also present.
• Sequence this code first as the primary diagnosis when it is the reason for the encounter.