ICD-10-CM 2027
ICD-10 code for Postencephalitic syndrome
F07.89
Other personality and behavioral disorders due to known physiological condition
✓ Billable / specificNot a principal dx
From the official ICD-10-CM alphabetic index entry “Postencephalitic syndrome”. Page updated September 29, 2026.
About coding Postencephalitic syndrome
The ICD-10-CM code for Postencephalitic syndrome is F07.89 (Other personality and behavioral disorders due to known physiological condition).
Within F07.8, choose F07.89 (Other personality and behavioral disorders due to known physiological condition) only when documentation doesn't support a more specific option: Postconcussional syndrome (F07.81).
Code first: the underlying physiological condition.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about Postencephalitic syndrome ICD-10 codes
What is the ICD-10 code for Postencephalitic syndrome?
- F07.89 — Other personality and behavioral disorders due to known physiological condition.
Is F07.89 billable?
- Yes. F07.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F07.89 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is F07.89 a CC or MCC?
- No. F07.89 is neither a CC nor an MCC under MS-DRG v44.0.