ICD-10 code for anxiety

The ICD-10-CM code for anxiety is F41.9 (Anxiety disorder, unspecified). The official index lists 4 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F41.9.

It is also searched as GAD, generalized anxiety disorder.

Within F41, choose F41.9 (Anxiety disorder, unspecified) only when documentation doesn't support a more specific option: panic disorder [episodic paroxysmal anxiety] (F41.0), generalized anxiety disorder (F41.1), other mixed anxiety disorders (F41.3) and other specified anxiety disorders (F41.8).

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 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), 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.