F41.1: Generalized anxiety disorder
Billable ICD-10-CM code, FY2027
What ICD-10-CM says
Includes
- Anxiety neurosis
- Anxiety reaction
- Anxiety state
- Overanxious disorder
Excludes2 (not part of F41.1; both may be coded)
- neurasthenia (F48.8)
Notes at F41, Other anxiety disorders (they apply to every code under it)
Excludes2 (not part of F41.1; both may be coded)
- anxiety in:
- acute stress reaction (F43.0)
- transient adjustment reaction (F43.2)
- neurasthenia (F48.8)
- psychophysiologic disorders (F45.-)
- separation anxiety (F93.0)
What F41.1 covers
F41.1 is used when the clinician diagnoses generalized anxiety disorder: ongoing, hard-to-control worry across many areas of life. The tabular also indexes older terms here, such as anxiety neurosis, anxiety reaction, anxiety state and overanxious disorder. Whether the DSM-5-TR criteria are met is the clinician's call.
Behavioral health, psychiatry and primary care use it often. Its nearest neighbors are F41.9 (anxiety disorder, unspecified), used when the type of anxiety is not documented, F41.0 for panic disorder, and F41.8 for other specified anxiety disorders. Anxiety that is a reaction to a stressor is usually coded as an adjustment disorder, such as F43.22.
Billing and coding notes
F41.1 is billable as is and needs no further characters. The parent category F41 carries an excludes2 list that includes acute stress reaction (F43.0), adjustment reaction (F43.2) and separation anxiety (F93.0). Excludes2 means those conditions are not part of GAD, so if the clinician documents both, both may be coded.
A frequent mix-up is defaulting to F41.9 when the note says "GAD" or "generalized anxiety". If the diagnosis is documented as generalized anxiety disorder, F41.1 is the accurate code. Neurasthenia (F48.8) is also an excludes2 at this code.
Related codes under F41
Questions about F41.1
What is the difference between F41.1 and F41.9?
F41.1 is a specific diagnosis, generalized anxiety disorder. F41.9 is anxiety disorder, unspecified (anxiety NOS), for when the record does not say what kind of anxiety disorder the patient has.
Can F41.1 and F43.23 be coded together?
The classification allows it, because adjustment disorders (F43.2) are an excludes2 under F41. Both are reported only when the clinician documents both diagnoses as separate conditions.
ICD-10-CM in CloudMedico
In CloudMedico, a visit's diagnoses come from the current ICD-10-CM list. For US practices, the visit flags a code that isn't billable on its date, and a superbill made from an invoice carries the visit's diagnoses.
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