- 300.3: Obsessive-Compulsive Disorder
- 301.4: Obsessive-Compulsive Personality Disorder
- V62.2: Occupational Problem
- 305.5: Opioid Abuse
- 304: Opioid Dependence
- 292.89: Opioid Intoxication
- 292.81: Opioid Intoxication Delirium
- 292: Opioid Withdrawal
- 292.84: Opioid-Induced Mood Disorder
- 292.11: Opioid-Induced Psychotic Disorder, With Delusions
- 292.12: Opioid-Induced Psychotic Disorder, With Hallucinations
- 292.89: Opioid-Induced Sexual Dysfunction
- 292.89: Opioid-Induced Sleep Disorder
- 292.9: Opioid-Related Disorder NOS
- 313.81: Oppositional Defiant Disorder
- 305.9: Other (or Unknown) Substance Abuse
- 304.9: Other (or Unknown) Substance Dependence
- 292.89: Other (or Unknown) Substance Intoxication
- 292: Other (or Unknown) Substance Withdrawal
- 292.89: Other (or Unknown) Substance-Induced Anxiety Disorder
- 292.81: Other (or Unknown) Substance-Induced Delirium
- 292.84: Other (or Unknown) Substance-Induced Mood Disorder
- 292.83: Other (or Unknown) Substance-Induced Persisting Amnestic Disorder
- 292.82: Other (or Unknown) Substance-Induced Persisting Dementia
- 292.11: Other (or Unknown) Substance-Induced Psychotic Disorder, With Delusions
- 292.12: Other (or Unknown) Substance-Induced Psychotic Disorder, With Hallucinations
- 292.89: Other (or Unknown) Substance-Induced Sexual Dysfunction
- 292.89: Other (or Unknown) Substance-Induced Sleep Disorder
- 292.9: Other (or Unknown) Substance-Related Disorder NOS
- 625.8: Other Female Sexual Dysfunction Due to...[Indicate the General Medical Condition]
- 608.89: Other Male Sexual Dysfunction Due to...[Indicate the General Medical Condition]
