F41.9 – Anxiety disorder, unspecified

Discover F41.9, the ICD-10 code for unspecified anxiety disorder, its clinical info, common synonyms, related codes, and how Carepatron can help your practice.

By Patricia Buenaventura on May 18, 2025.

Fact Checked by Karina Jimenea.

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F41.9 – Anxiety disorder, unspecified

F41.9 diagnosis code: Anxiety disorder, unspecified

  • F41.9 is an ICD-10 diagnosis code representing anxiety disorder, unspecified.
  • This code is used when a healthcare professional diagnoses a patient with an anxiety disorder, but the specific type of anxiety disorder cannot be determined.
  • Unspecified anxiety disorders can present with various symptoms, including excessive worry, restlessness, fatigue, difficulty concentrating, irritability, and sleep disturbances. Physical symptoms include rapid breathing, sweating, trembling, and heart palpitations.
  • Healthcare professionals should thoroughly examine, including a detailed medical history and psychological evaluation, to identify potential underlying causes and contributing factors.
  • Additional assessments, such as questionnaires or rating scales, may be used to evaluate the severity and impact of the anxiety symptoms.

Is F41.9 billable?

Yes, F41.9 is a billable ICD-10 code, which healthcare professionals can use for insurance claims and reimbursement purposes. The code applies to patients who meet the diagnostic criteria for anxiety disorder, unspecified, as established by healthcare providers.

Clinical information

  • Anxiety disorders are among the most common mental health conditions, affecting millions worldwide. There are several types such as social anxiety disorder, separation anxiety disorder, and general anxiety disorder.
  • Unspecified anxiety disorders or psychiatric disorders with anxious feelings or fear can result from various factors, including genetic predisposition, environmental stressors, and underlying medical conditions.
  • Early intervention and appropriate treatment are crucial in managing anxiety symptoms and improving patients' quality of life.
  • Psychotherapy, such as cognitive-behavioral therapy (CBT), can help patients develop coping strategies and address irrational thought patterns contributing to anxiety.
  • Medications, including antidepressants, benzodiazepines, and beta-blockers, may be prescribed to help manage anxiety symptoms.
  • Lifestyle modifications, such as regular exercise, a healthy diet, and good sleep hygiene, can significantly reduce anxiety symptoms.

Synonyms include

  • Anxiety disorder NOS (Not otherwise specified)
  • Anxiety state, unspecified
  • Generalized anxiety
  • Anxiety reaction
  • Undifferentiated anxiety
  • Pregnancy anxiety
  • Childbirth anxiety
  • Pregnancy antepartum anxiety

Other ICD-10 codes commonly used for anxiety disorder

  • F40.00: Agoraphobia, unspecified
  • F40.10: Social phobia, unspecified
  • F41.0: Panic disorder [episodic paroxysmal anxiety]
  • F41.1: Generalized anxiety disorder
  • F41.3: Other mixed anxiety disorders

Frequently asked questions

Is F41.9 a definitive diagnosis?

No, it's generally considered a non-specific diagnosis. Further evaluation is needed to identify the type of anxiety.

When to use the F41.9 code?

One can use the F41.9 code when one cannot pinpoint the patient's specific anxiety disorder, when they meet the criteria for general anxiety disorder but not for any other specific type, and when further investigation or observation is needed to reach a more precise diagnosis.

What documentation is needed when using the F41.0 code?

The healthcare provider must include the following in the patient's medical records: anxiety symptoms, impact of the symptoms, relevant history, clinician's assessment and rational, and any plans for further evaluation or treatment.

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