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  6. 2025 ICD-10-CM Code F40.00

2025 ICD-10-CM Diagnosis Code F40.00

Agoraphobia, unspecified

ICD-10-CM Code:
F40.00
ICD-10 Code for:
Agoraphobia, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

F40.00 is a billable diagnosis code used to specify a medical diagnosis of agoraphobia, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.

Unspecified diagnosis codes like F40.00 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Code Classification

  • Mental and behavioural disorders
    F01–F99
    • Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
      F40-F48
      • Phobic anxiety disorders
        F40

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

  • Agoraphobia
  • Fear of going out
  • Fear of open spaces

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Anxiety and fear-related disorders

CCSR Code: MBD005

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Agoraphobia

    obsessive, persistent, intense fear of places or situations from which escape might be difficult or embarrassing.

  • Agoraphobia

    an anxiety disorder characterized by an intense, irrational fear of venturing out into open places or situations in which help (or escape) might not be available should excessive anxiety or panic symptoms develop.

  • Agoraphobia without a History of Panic Disorder

    an anxiety disorder characterized by agoraphobia in the absence of a history of panic attacks; the individual fears incapacitation or humiliation in open, public places or situations due to panic-like symptoms rather than a full-blown panic attack.

  • Panic Disorder with Agoraphobia

    a disorder in which an individual experiences recurrent, unexpected panic attacks and persistent concern about having additional panic attacks. agoraphobia is a component of this disorder.

  • Panic Disorder without Agoraphobia

    a disorder in which an individual experiences recurrent, unexpected panic attacks and persistent concern about having additional panic attacks. agoraphobia is not a component of this disorder.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert F40.00 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Agoraphobia w/o panic

ICD-9-CM: 300.22

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Patient Education


Phobias

A phobia is a type of anxiety disorder. It is a strong, irrational fear of something that poses little or no real danger.

There are many specific phobias. Acrophobia is a fear of heights. 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

Phobias usually start in children or teens, and continue into adulthood. The causes of specific phobias are not known, but they sometimes run in families.

Treatment helps most people with phobias. Options include medicines, therapy or both.

NIH: National Institute of Mental Health


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.