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🧠 Chapter 5 · F01-F99

Mental Health Diagnosis Codes

Mental health codes document conditions ranging from anxiety and depression to substance use disorders and developmental conditions. Accurate coding is especially important here because it affects insurance coverage for therapy, medication, and inpatient treatment.

About This Chapter

Chapter 5 of the ICD-10-CM classification covers mental, behavioral and neurodevelopmental disorders, spanning codes F01-F99. These codes are used by healthcare providers to document diagnoses in your electronic health record (EHR), on insurance claims, and on medical bills.

Why this matters: If you see a code starting with F on your medical bill or health records, it likely falls in this chapter. Understanding what chapter your code belongs to can help you make sense of your diagnosis and ask better questions at your next appointment.

Diagnosis Codes in This Chapter

Browse the 48 diagnosis codes we currently cover in this chapter. Select any code to read a plain-English explanation.

F10.10Alcohol Abuse, Uncomplicated F10.20Alcohol Dependence, Uncomplicated... F11.10Opioid Abuse, Uncomplicated F11.20Opioid Dependence, Uncomplicated... F12.20Cannabis Dependence, Uncomplicated... F13.20Sedative Dependence, Uncomplicated... F14.20Cocaine Dependence, Uncomplicated... F15.20Stimulant Dependence, Uncomplicated... F17.210Nicotine Dependence, Cigarettes... F19.20Other Psychoactive Substance Dependence... F20.9Schizophrenia, Unspecified F25.0Schizoaffective Disorder, Bipolar Type... F31.9Bipolar Disorder, Unspecified F32.0Major Depression, Mild F32.1Major Depression, Moderate F32.9Major Depressive Disorder, Unspecified... F33.0Recurrent Major Depression, Mild F33.1Recurrent Major Depression, Moderate... F34.1Dysthymic Disorder (Persistent Depressive D... F40.10Social Anxiety Disorder F41.0Panic Disorder F41.1Generalized Anxiety Disorder F41.9Anxiety Disorder, Unspecified F42.9Obsessive-Compulsive Disorder F43.10Post-Traumatic Stress Disorder (PTSD)... F43.12Post-Traumatic Stress Disorder, Chronic... F43.20Adjustment Disorder, Unspecified... F43.23Adjustment Disorder with Mixed Anxiety and... F44.9Dissociative Disorder F45.9Somatoform Disorder F48.1Depersonalization-Derealization Syndrome... F50.00Anorexia Nervosa, Unspecified F50.01Anorexia Nervosa, Restricting Type... F50.02Anorexia Nervosa, Binge Eating-Purging Typ... F50.2Bulimia Nervosa F51.01Primary Insomnia F51.11Sleep Disorder Due to General Medical Cond... F60.3Borderline Personality Disorder F63.0Pathological Gambling F64.0Gender Identity Disorder F80.9Developmental Disorder of Speech and Langua... F84.0Autistic Disorder F90.0Attention-Deficit Hyperactivity Disorder, P... F90.2Attention-Deficit Hyperactivity Disorder, C... F91.3Oppositional Defiant Disorder F93.0Separation Anxiety Disorder of Childhood... F95.2Tourette Disorder F99Mental Disorder, Unspecified