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Unspecified mental disorder due to known physiological condition F09

The ICD10 code for the diagnosis "Unspecified mental disorder due to known physiological condition" is "F09". F09 is a VALID/BILLABLE ICD10 code, i.e it is valid for submission for HIPAA-covered transactions.

  • F09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM F09 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of F09 - other international versions of ICD-10 F09 may differ.
Applicable To:
  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS
Code First:
  • the underlying physiological condition
Type 1 Excludes:
  • psychosis NOS (F29)

Codes: = Billable

  • F09 Unspecified mental disorder due to known physiological condition

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.