All ICD10 Codes

F09

Billable
ChapterF01–F99
Rankcategory
Official Description

Unspecified mental disorder due to known physiological condition

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders (F01-F99).

CH5 Parent Instructions

Includes
  • disorders of psychological development
Excludes2(Not included here. Code separately if applicable.)
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Instructional Notes

Includes
  • Mental disorder NOS due to known physiological condition
  • Organic brain syndrome NOS
  • Organic mental disorder NOS
  • Organic psychosis NOS
  • Symptomatic psychosis NOS
Excludes1(Not coded here. Use a different code.)
  • mild neurocognitive disorder due to known physiological condition (F06.7-)
  • psychosis NOS (F29)
Code First
  • the underlying physiological condition

Clinical Hierarchy

BillableHas subcodes
CH5Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
F01-F09Mental disorders due to known physiological conditions (F01-F09)
F09Unspecified mental disorder due to known physiological conditionBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to F09:

chapterCH5
Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 884
Organic Disturbances and Intellectual Disability
DRG 974
HIV with Major Related Condition with MCC
DRG 975
HIV with Major Related Condition with CC
DRG 976
HIV with Major Related Condition without CC/MCC

Cross Reference

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