The ICD-10-CM code for anxiety, unspecified, is F41.9. Generalized anxiety disorder is F41.1 and panic disorder is F41.0. The other billable codes in the category are F41.3 (other mixed anxiety disorders) and F41.8 (other specified anxiety disorders). There is no F41.2 in the U.S. code set. Phobias, including social anxiety disorder, are coded in category F40.
Anxiety ICD-10 codes: quick reference
| Code | Description | Billable | When to use |
| F41.0 | Panic disorder [episodic paroxysmal anxiety] | Yes | Recurrent, unexpected panic attacks without agoraphobia |
| F41.1 | Generalized anxiety disorder | Yes | Persistent, hard-to-control worry about many life areas |
| F41.3 | Other mixed anxiety disorders | Yes | Provider documents a mixed anxiety disorder |
| F41.8 | Other specified anxiety disorders | Yes | Specified type not listed elsewhere, incl. mixed anxiety and depressive disorder |
| F41.9 | Anxiety disorder, unspecified | Yes | “Anxiety” documented with no specific disorder identified |
| F41 | Other anxiety disorders (category) | No | Never bill; always use a 4th character |
| F40.10 | Social phobia, unspecified | Yes | Social anxiety disorder (coded in F40, not F41) |
Anxiety disorders are among the most common mental health conditions. The World Health Organization estimates that about 4% of the world’s population has an anxiety disorder at any given time. For practices that treat them, from primary care to psychiatry, choosing the right ICD-10-CM code affects whether claims are paid and whether the diagnosis supports ongoing treatment.
This guide explains each billable code in the F41 category, where related conditions such as phobias and adjustment disorders are coded, and how to document and bill anxiety claims correctly.
Understanding Anxiety Disorders
Anxiety disorders involve fear or worry that is excessive, persistent, and hard to control, to the point that it affects daily life. The main types, and where each is coded, are:
- Generalized anxiety disorder (GAD): ongoing worry about many areas of life, with restlessness, fatigue, poor concentration, irritability, muscle tension, or sleep problems. Coded F41.1.
- Panic disorder: recurrent, unexpected panic attacks with palpitations, sweating, trembling, or shortness of breath, followed by worry about further attacks. Coded F41.0.
- Social anxiety disorder: marked fear of social situations and of being judged. Coded F40.10 or F40.11.
- Specific phobias: intense fear of a specific object or situation. Coded in subcategory F40.2-.
- Agoraphobia: fear and avoidance of places where escape may be difficult. Coded F40.00–F40.02.
Diagnosis is made through clinical evaluation against DSM-5-TR criteria. Screening tools such as the GAD-7 help measure severity and track progress, and the score is useful supporting documentation.
Overview of ICD-10 Coding
U.S. providers bill with ICD-10-CM, the clinical modification of the WHO’s ICD-10 maintained by CMS and CDC. The two versions are not identical, which is why some online sources list codes that do not exist in the U.S. set (F41.2 is the most common example). Read more about the role of ICD-10 and CPT codes in billing.
Anxiety codes sit in Chapter 5 (F01–F99), in the block F40–F48: anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders. Category F41 holds “other anxiety disorders”; category F40 holds phobic anxiety disorders. The ICD-10-CM code set is updated every October 1, so always check the current year’s tabular list.
ICD-11 is in use in other countries, but the U.S. still bills with ICD-10-CM. See our article on the ICD-11 transition and U.S. medical billing.
Detailed Breakdown of Anxiety Disorder ICD-10 Codes
F41.0: Panic Disorder
What it covers
Use F41.0 (Panic disorder [episodic paroxysmal anxiety]) for recurrent, unexpected panic attacks followed by at least one month of persistent worry about additional attacks or behavior changes related to them. The code also covers panic attack and panic state.
Coding notes
Panic disorder with agoraphobia is excluded from F41.0; code it as F40.01. Document the frequency of attacks, the physical symptoms, and any avoidance behavior.
F41.1: Generalized Anxiety Disorder
What it covers
Use F41.1 when the patient experiences excessive anxiety and worry more days than not for at least six months and has difficulty controlling the worry. It also covers anxiety neurosis, anxiety reaction, anxiety state, and overanxious disorder.
Coding notes
Document symptom duration, the specific symptoms present, the impact on functioning, and a GAD-7 score where available. F41.1 ranks among the most frequently billed mental health diagnoses, so clear documentation helps support the claim if a payer reviews the record.
F41.3: Other Mixed Anxiety Disorders
Use F41.3 when the provider documents a mixed anxiety disorder. Do not use F41.3 for mixed anxiety and depressive disorder; the ICD-10-CM index directs you to F41.8.
Where Are Phobias and Social Anxiety Disorder Coded? (F40)
Phobic anxiety disorders have their own category, F40. Commonly used codes include:
- F40.00–F40.02: agoraphobia (unspecified, with panic disorder, without panic disorder).
- F40.10 / F40.11: social phobia, unspecified / generalized (social anxiety disorder).
- F40.2-: specific phobias, coded by type, for example F40.210 (arachnophobia), F40.240 (claustrophobia), F40.241 (acrophobia), and F40.243 (fear of flying).
- F40.9: phobic anxiety disorder, unspecified.
Document the feared object or situation, because the specific phobia codes depend on it.
F41.8: Other Specified Anxiety Disorders
What it covers
F41.8 is used for a specified anxiety disorder that does not fit another F41 code. The ICD-10-CM index directs anxiety depression (mild or not persistent), anxiety hysteria, and mixed anxiety and depressive disorder to this code.
Coding notes
Make sure the note names the specific presentation. “Other specified” means the provider has specified something; if nothing is specified, F41.9 is the correct code.
F41.9: Anxiety Disorder, Unspecified
What it covers
F41.9 is the default code when “anxiety” is documented without a specific disorder. It is common in emergency, urgent care, and primary care visits, where there is not yet enough information for a specific diagnosis.
Coding notes
F41.9 is billable, but it should not stay on a patient’s record once a specific diagnosis has been made. For ongoing therapy or medication management, a specific code better supports medical necessity.
Related Anxiety Codes Outside F41
Anxiety that is caused by another condition or event is coded outside F41. Check these before choosing an F41 code:
| Code | Description | Use when |
| F06.4 | Anxiety disorder due to known physiological condition | Anxiety is caused by a medical condition (code the condition first) |
| F43.0 | Acute stress reaction | Anxiety follows a recent, specific stressful event |
| F43.10 | Post-traumatic stress disorder, unspecified | PTSD is diagnosed |
| F43.22 | Adjustment disorder with anxiety | Anxiety is a reaction to an identifiable life stressor |
| F43.23 | Adjustment disorder with mixed anxiety and depressed mood | Adjustment reaction with both anxiety and low mood |
| F93.0 | Separation anxiety disorder of childhood | Separation anxiety in a child |
For depression codes commonly reported alongside anxiety, see our F32.9 and F33.9 depression coding guide. For another common co-occurring diagnosis, ADHD, see our ADHD ICD-10 guide.
Clinical Implications of Anxiety Disorders
Health Implications
Anxiety disorders can have profound effects on physical health, increasing the risk of chronic conditions such as cardiovascular disease, gastrointestinal issues, and immune system dysfunction. Understanding these implications is crucial for comprehensive patient care.
Treatment Approaches
Treatment for anxiety disorders often involves a multi-faceted approach, combining psychotherapy, pharmacotherapy, and lifestyle modifications. Personalized treatment plans should consider the patient’s unique symptoms and circumstances to enhance effectiveness.
The Role of Healthcare Providers
Healthcare providers play a vital role in the diagnosis, management, and support of individuals with anxiety disorders. Ongoing education, collaboration with mental health specialists, and compassionate care are essential components of effective treatment.
Anxiety Disorder ICD-10 Codes-Coding Guidelines and Best Practices
Code to the highest specificity documented. Use F41.1 or F41.0 when the provider documents them; do not default to F41.9.
Check Excludes notes. F41 excludes anxiety in acute stress reaction (F43.0), transient adjustment reaction (F43.2-), psychophysiologic disorders (F45.-), and separation anxiety (F93.0).
Code co-existing conditions. List depression, substance use, or other diagnoses the provider addresses, with the main reason for the visit first.
Support the diagnosis in the note. Symptoms, duration, functional impact, screening scores, and the treatment plan should all be documented.
Update annually. Review EHR diagnosis pick-lists and templates every October 1 when the new ICD-10-CM code set takes effect.
Billing Anxiety Disorder Claims: Common CPT Pairings
The diagnosis code has to match the service billed. Common anxiety treatment pairings appear below. For complete details, see our psychotherapy CPT code billing guide.
| CPT code | Service |
| 90791 | Psychiatric diagnostic evaluation (initial assessment) |
| 90832 / 90834 / 90837 | Individual psychotherapy, about 30 / 45 / 60 minutes |
| 99202–99215 + 90833 / 90836 / 90838 | E/M visit for medication management with add-on psychotherapy |
| 96127 | Brief emotional/behavioral assessment, such as a GAD-7 screening |
Telehealth visits need the correct place of service code and any modifier the payer requires; rules differ by payer, so check each contract. See our guide to telehealth billing compliance. Common causes of denied anxiety claims include an unspecified diagnosis on long-term therapy claims, missing prior authorization for higher-frequency sessions, and time documentation that does not support the psychotherapy code billed. Learn more about the challenges of mental health billing.
Recent Trends and Future Directions in Anxiety Disorder Management
Advances in Research
Ongoing research into anxiety disorders continues to shed light on underlying causes, treatment efficacy, and long-term outcomes, guiding healthcare providers in evidence-based practice.
Role of Technology
The integration of technology in mental health care, including telehealth services, has expanded access to treatment for individuals with anxiety disorders. Understanding coding for telehealth visits is crucial for accurate billing.
Importance of Awareness and Education
Promoting awareness of anxiety disorders among healthcare providers and the public can improve early diagnosis, reduce stigma, and enhance access to effective treatment.
Frequently Asked Questions
Anxiety Disorder ICD-10 Codes
What is the ICD-10 code for anxiety?
When a provider documents “anxiety” without naming a specific disorder, the ICD-10-CM code is F41.9, Anxiety disorder, unspecified. If the provider documents a specific diagnosis, use the matching code instead, such as F41.1 for generalized anxiety disorder or F41.0 for panic disorder.
What is the ICD-10 code for generalized anxiety disorder?
Generalized anxiety disorder is coded F41.1. It is a billable code and also covers terms such as anxiety neurosis, anxiety reaction, anxiety state, and overanxious disorder.
What is the difference between F41.1 and F41.9?
Use F41.1 when the provider diagnoses generalized anxiety disorder. Use F41.9 when the provider documents anxiety but does not identify a specific anxiety disorder. Once an evaluation confirms a specific disorder, the more specific code should replace F41.9.
What is the difference between F41.0 and F41.1?
F41.0 is panic disorder, marked by recurrent, unexpected panic attacks. F41.1 represents generalized anxiety disorder, which involves ongoing, difficult-to-control worry about multiple areas of life. Code panic disorder with agoraphobia as F40.01, not F41.0.
Is there an F41.2 code in ICD-10-CM?
No. The U.S. ICD-10-CM code set used for billing has no F41.2. The WHO’s international ICD-10 uses F41.2 for mixed anxiety and depressive disorder, whereas ICD-10-CM indexes the condition to F41.8.
What is the ICD-10 code for social anxiety disorder?
Social anxiety disorder (social phobia) is coded in category F40, not F41. Use F40.10 for social phobia, unspecified, or F40.11 for generalized social phobia.
What is the ICD-10 code for anxiety with depression?
Code mild or non-persistent anxiety with depression, including mixed anxiety and depressive disorder, as F41.8. If the provider diagnoses a separate depressive disorder and a separate anxiety disorder, code each one. Adjustment disorder with mixed anxiety and depressed mood is F43.23.
Can F41.9 be billed for psychotherapy?
Yes, F41.9 is a billable code. However, for ongoing therapy, many payers expect providers to document a more specific diagnosis after evaluating the patient, and a specific code better supports medical necessity. Update the diagnosis as soon as the provider documents one.
Final Thoughts
F41.9, F41.1, and F41.0 cover most anxiety diagnoses, but correct coding depends on knowing what sits outside the F41 category: phobias in F40, stress and adjustment reactions in F43, and anxiety due to medical conditions in F06.4. Code to the most specific diagnosis documented, keep notes that support it, and review your code set every October 1.
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