2020 ICD-10-CM Diagnosis Code F40.9

Phobic anxiety disorder, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • F40.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM F40.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of F40.9 - other international versions of ICD-10 F40.9 may differ.
Applicable To
  • Phobia NOS
  • Phobic state NOS
The following code(s) above F40.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to F40.9:
  • F01-F99
    2020 ICD-10-CM Range F01-F99

    Mental, Behavioral and Neurodevelopmental disorders

    Includes
    • disorders of psychological development
    Type 2 Excludes
    • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
    Mental, Behavioral and Neurodevelopmental disorders
Approximate Synonyms
  • Phobia
Clinical Information
  • A phobia is a type of anxiety disorder. It is a strong, irrational fear of something that poses little or no actual danger. There are many specific phobias. Acrophobia is a fear of heights. You may be able to ski the world's tallest mountains but be unable to go above the 5th floor of an office building. Agoraphobia is a fear of public places, and claustrophobia is a fear of closed-in places. If you become anxious and extremely self-conscious in everyday social situations, you could have a social phobia. Other common phobias involve tunnels, highway driving, water, flying, animals and blood. People with phobias try to avoid what they are afraid of. If they cannot, they may experience
    • panic and fear
    • rapid heartbeat
    • shortness of breath
    • trembling
    • a strong desire to get away
    treatment helps most people with phobias. Options include medicines, therapy or both.
  • An anxiety disorder characterized by an intense, irrational fear of an object, activity, or situation. The individual seeks to avoid the object, activity, or situation. In adults, the individual recognizes that the fear is excessive or unreasonable.
  • An extreme, irrational, fear of something that may cause a person to panic. Examples of common phobias include fear of spiders, flying in an airplane, elevators, heights, enclosed rooms, crowded public places, and embarrassing oneself in front of other people.
  • Anxiety disorder characterized by intense, unrealistic, persistent fear and avoidance of an object, activity, or situation.
  • Anxiety disorders in which the essential feature is persistent and irrational fear of a specific object, activity, or situation that the individual feels compelled to avoid. The individual recognizes the fear as excessive or unreasonable.
  • Continuous irrational fear about certain object, situation, or activity
  • Disorders characterized by persistent, unrealistic, intense fear of an object, activity, or situation.
ICD-10-CM F40.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 882 Neuroses except depressive

Convert F40.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to F40.9:
  • Disorder (of) - see also Disease
    • anxiety F41.9
      ICD-10-CM Diagnosis Code F41.9

      Anxiety disorder, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Anxiety NOS
    • psychogenic NOS F45.9
      - see also condition
      ICD-10-CM Diagnosis Code F45.9

      Somatoform disorder, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Psychosomatic disorder NOS
      • phobic F40.9
  • Fear complex or reaction F40.9
  • Neurosis, neurotic F48.9
    ICD-10-CM Diagnosis Code F48.9

    Nonpsychotic mental disorder, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Neurosis NOS
    • phobic F40.9
  • Phobia, phobic F40.9
    • reaction F40.9
    • state F40.9
  • Reaction - see also Disorder
    • fear F40.9
    • phobic F40.9
  • State (of)
    • phobic F40.9

ICD-10-CM Codes Adjacent To F40.9
F40.240 Claustrophobia
F40.241 Acrophobia
F40.242 Fear of bridges
F40.243 Fear of flying
F40.248 Other situational type phobia
F40.29 Other specified phobia
F40.290 Androphobia
F40.291 Gynephobia
F40.298 Other specified phobia
F40.8 Other phobic anxiety disorders
F40.9 Phobic anxiety disorder, unspecified
F41 Other anxiety disorders
F41.0 Panic disorder [episodic paroxysmal anxiety]
F41.1 Generalized anxiety disorder
F41.3 Other mixed anxiety disorders
F41.8 Other specified anxiety disorders
F41.9 Anxiety disorder, unspecified
F42 Obsessive-compulsive disorder
F42.2 Mixed obsessional thoughts and acts
F42.3 Hoarding disorder
F42.4 Excoriation (skin-picking) disorder

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.