Emergency: 119
AMDA-IMIC

F09 Unspecified mental disorder due to known physiological condition

Billable

Block: Mental disorders due to known physiological conditions (F01-F09)

Includes

  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS

Excludes 1 (cannot be coded together)

  • mild neurocognitive disorder due to known physiological condition (F06.7-)
  • psychosis NOS (F29)

Code First

  • the underlying physiological condition
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This category is a complete, billable diagnosis code.

No additional specificity is required — submit F09 directly on claims and documentation without a subcode extension.

Last reviewed: September 2026