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F41.9 · Billable

2026 ICD-10-CM Diagnosis Code F41.9

Anxiety disorder, unspecified

About F41.9

Code

F41.9

Description

Anxiety disorder, unspecified

Billable

Yes — billable on its own

Parent code

F41 (Other anxiety disorders)

Category

F40-F49 — Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders

Set

ICD-10-CM 2026

Clinical context

Inherited from F41 (Other anxiety disorders)

F41 covers anxiety conditions not classified as specific phobias — including panic disorder (F41.0), generalized anxiety disorder (F41.1), and mixed anxiety and depressive disorder (F41.2). F41.1 is among the highest-volume outpatient mental health codes.

Code details

Code attributes

  • Non-billable/Non-specific code

Type 2 Excludes

  • Anxiety in: acute stress reaction (F43.0), transient adjustment reaction (F43.2)

Coding rules

  • Differentiate panic vs. GAD — Panic disorder (F41.0) requires discrete attacks; GAD (F41.1) requires persistent worry across multiple domains for at least 6 months.
  • Use validated screening — GAD-7 and Panic Disorder Severity Scale support objective documentation of symptom severity over time.
  • F41.9 only as last resort — Unspecified anxiety disorder (F41.9) is a placeholder. Aim for specificity once symptoms are clear.

Sources

  • Centers for Medicare & Medicaid Services — 2026 ICD-10-CM
  • AAPC — ICD-10-CM Code Lookup
  • CDC — ICD-10-CM Official Guidelines for Coding and Reporting

This reference is provided for billing and documentation guidance only. It is not medical advice. For clinical decision-making, consult the current CMS ICD-10-CM Official Guidelines for Coding and Reporting, and verify code applicability against the patient's documented clinical findings.

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