ICD-10-CM 2027
ICD-10 code for Derealization
From the official ICD-10-CM alphabetic index entry “Derealization (neurotic)”. Page updated September 29, 2026.
About coding Derealization
The ICD-10-CM code for Derealization is F48.1 (Depersonalization-derealization syndrome).
Within F48 (other nonpsychotic mental disorders), F48.1 is specifically for Depersonalization-derealization syndrome. Related codes cover Pseudobulbar affect (F48.2), other specified nonpsychotic mental disorders (F48.8) and nonpsychotic mental disorder, unspecified (F48.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 882 (Neuroses Except Depressive, relative weight 0.9952), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Derealization ICD-10 codes
What is the ICD-10 code for Derealization?
- F48.1 — Depersonalization-derealization syndrome.
Is F48.1 billable?
- Yes. F48.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F48.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F48.1 as a principal diagnosis.
Is F48.1 a CC or MCC?
- No. F48.1 is neither a CC nor an MCC under MS-DRG v44.0.