ICD-10-CM 2026 · Chapter F01-F99

Mental, Behavioral and Neurodevelopmental disorders

11 sections · 1,112 total codes · 871 billable

11
Code Sections
1,112
Total Codes
871
Billable
12
Most-Searched

About Chapter F01-F99

ICD-10-CM Chapter F01-F99 covers mental, behavioral and neurodevelopmental disorders. The chapter contains 11 sections (code blocks) and 1,112 total codes - 871 are billable on a claim, the rest are non-billable headers used to organize the hierarchy.

Browse below by section, or jump straight to the most-billed codes in this chapter. Every code page includes Type 1/2 Excludes, Inclusion Terms, ICD-9 GEMs crosswalk, HCC mapping, LCD coverage, and payer-specific policies.

Most-Searched Diagnoses in This Chapter

Codes with the most LCD coverage, payer policies, and CPT linkages, proxies for what billers look up most.

F20.0 Paranoid schizophrenia
861 refs
F20.1 Disorganized schizophrenia
859 refs
F20.2 Catatonic schizophrenia
853 refs
F33.2 Major depressive disorder, recurrent severe without psychotic features
720 refs
F32.2 Major depressive disorder, single episode, severe without psychotic features
709 refs
F20.89 Other schizophrenia
704 refs
F20.81 Schizophreniform disorder
690 refs
F31.4 Bipolar disorder, current episode depressed, severe, without psychotic features
687 refs
F31.5 Bipolar disorder, current episode depressed, severe, with psychotic features
687 refs
F31.63 Bipolar disorder, current episode mixed, severe, without psychotic features
687 refs
F32.3 Major depressive disorder, single episode, severe with psychotic features
686 refs
F33.3 Major depressive disorder, recurrent, severe with psychotic symptoms
686 refs

All Sections in F01-F99

Each section is a code block (e.g. E08-E13 = Diabetes mellitus). Click a section to see all codes inside.

F01-F09 Mental disorders due to known physiological conditions
123 codes · 91 billable
F10-F19 Mental and behavioral disorders due to psychoactive substance use
590 codes · 458 billable
F20-F29 Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders
21 codes · 18 billable
F30-F39 Mood [affective] disorders
76 codes · 62 billable
F40-F48 Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
92 codes · 71 billable
F50-F59 Behavioral syndromes associated with physiological disturbances and physical factors
81 codes · 66 billable
F60-F69 Disorders of adult personality and behavior
52 codes · 42 billable
F70-F79 Intellectual disabilities
9 codes · 7 billable
F80-F89 Pervasive and specific developmental disorders
27 codes · 22 billable
F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
40 codes · 33 billable
F99 Unspecified mental disorder
1 codes · 1 billable
← Previous Chapter
E00-E89
Endocrine, nutritional and metabolic diseases
Next Chapter →
G00-G99
Diseases of the nervous system

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Reviewed by the PayerReady Medical Coding Team

Verified against the CMS 2026 code set on May 31, 2026.

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