F43.20 Adjustment disorder, unspecified

Billable ICD-10-CM code, FY2026.

Applies from F43.2 Adjustment disorders

Applicable to

• Culture shock
• Grief reaction
• Hospitalism in children

Excludes2 (not included here)

• separation anxiety disorder of childhood (F93.0)

Risk adjustment (HCC)

• RxHCC V08: HCC 133 — Anxiety and Other Psychiatric Disorders

MS-DRG index

Defines the logic of DRG(s) 882 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 309.9 Unspecified adjustment reaction (approximate)

Code annotations containing back-references to F43.20

Back-references to F43.2

• Type 2 Excludes: F32 Depressive episode ("adjustment disorder (F43.2)")
• Type 2 Excludes: F41 Other anxiety disorders ("transient adjustment reaction (F43.2)")
• Type 2 Excludes: F94.2 Disinhibited attachment disorder of childhood ("hospitalism in children (F43.2-)")

Back-references to F43

• Type 2 Excludes: F93.0 Separation anxiety disorder of childhood ("nonpsychotic mental disorders (F40-F48)")

Diagnosis Index entries for F43.20

• Disorder (of) › adjustment (grief)
• Grief › reaction
• Nostalgia

Nearby codes

• F43.1 Post-traumatic stress disorder (PTSD)
• F43.10 Post-traumatic stress disorder, unspecified
• F43.11 Post-traumatic stress disorder, acute
• F43.12 Post-traumatic stress disorder, chronic
• F43.2 Adjustment disorders
• F43.20 Adjustment disorder, unspecified (this code)
• F43.21 Adjustment disorder with depressed mood
• F43.22 Adjustment disorder with anxiety
• F43.23 Adjustment disorder with mixed anxiety and depressed mood
• F43.24 Adjustment disorder with disturbance of conduct
• F43.25 Adjustment disorder with mixed disturbance of emotions and conduct