F40-F48
Medium Complexity
Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders
Primary Specialty: Psychiatry
Last Updated: 2025-09-10
ICD-10 Codes (60)
60 billable0 category headers
F41Billable
F41.0Billable
F41.1Billable
F41.3Billable
F41.8Billable
F41.9Billable
F42Billable
F42.2Billable
F42.3Billable
F42.4Billable
F42.8Billable
F42.9Billable
F43Billable
F43.0Billable
F43.1Billable
F43.10Billable
F43.11Billable
F43.12Billable
F43.2Billable
F43.20Billable
F43.21Billable
F43.22Billable
F43.23Billable
F43.24Billable
F43.25Billable
F43.29Billable
F43.8Billable
F43.81Billable
F43.89Billable
F43.9Billable
F44Billable
F44.0Billable
F44.1Billable
F44.2Billable
F44.4Billable
F44.5Billable
F44.6Billable
F44.7Billable
F44.8Billable
F44.81Billable
F44.89Billable
F44.9Billable
F45Billable
F45.0Billable
F45.1Billable
F45.2Billable
F45.20Billable
F45.21Billable
F45.22Billable
F45.29Billable
F45.4Billable
F45.41Billable
F45.42Billable
F45.8Billable
F45.9Billable
F48Billable
F48.1Billable
F48.2Billable
F48.8Billable
F48.9Billable
Updates & Changes
FY 2026 Updates
Current Year
New Codes (2)
F10.288
Alcohol use disorder with other alcohol-induced disorder, severe
F11.288
Opioid use disorder with other opioid-induced disorder, severe
Revised Codes (2)
F11.10
Opioid abuse, uncomplicated - updated to align with DSM-5-TR criteria
F12.10
Cannabis abuse, uncomplicated - updated terminology and criteria
Deleted Codes
No codes deleted in this range for FY 2026
Historical Changes
- •FY 2025: Routine maintenance updates with minor terminology clarifications
- •FY 2024: Enhanced specificity requirements for certain code ranges
- •FY 2023: Updated documentation guidelines for improved clarity
Upcoming Changes
- •Proposed updates pending review by Coordination and Maintenance Committee
- •Under consideration: Enhanced digital health integration codes
Implementation Guidance
- •Review all FY 2026 updates for F40-F48 codes before implementation
- •Always verify the most current codes in the ICD-10-CM manual
- •Ensure clinical documentation supports the selected diagnosis codes
- +3 more guidance items...
Range Overview
high priority
The ICD-10 code range F40-F48 pertains to Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders. This range includes various types of anxiety disorders, phobic disorders, obsessive-compulsive disorder, stress-related disorders, somatoform disorders, and other nonpsychotic mental disorders. These codes are used to document diagnoses related to these mental health conditions.
Key Usage Points:
- •F40-F48 codes are used for diagnoses of nonpsychotic mental disorders.
- •These codes cover a wide range of conditions, from generalized anxiety to somatoform disorders.
- •Each code specifies the type of disorder and, in some cases, the severity or frequency of symptoms.
- •F43 codes, for example, are used for reactions to severe stress and adjustment disorders.
- •F45 codes are used for somatoform disorders, which are characterized by physical symptoms that suggest physical illness or injury.
Coding Guidelines
When to Use:
- ✓When a patient is diagnosed with a specific anxiety disorder.
- ✓When a patient is diagnosed with a stress-related disorder.
- ✓When a patient is diagnosed with a somatoform disorder.
- ✓When a patient is diagnosed with a dissociative disorder.
- ✓When a patient is diagnosed with another specific nonpsychotic mental disorder.
When NOT to Use:
- ✗When a patient has symptoms of anxiety but has not been diagnosed with a specific disorder.
- ✗When a patient's stress-related symptoms are better explained by another diagnosis.
- ✗When a patient's physical symptoms are confirmed to be due to a physical illness or injury, not a somatoform disorder.
- ✗When a patient's dissociative symptoms are part of another mental disorder, such as schizophrenia.
- ✗When a patient's mental disorder is psychotic, not nonpsychotic.
Code Exclusions
Always verify exclusions with the patient's specific diagnosis and the ICD-10 guidelines.
Documentation Requirements
Documentation for F40-F48 codes should clearly specify the type of disorder, the severity or frequency of symptoms, and any relevant features of the disorder. The documentation should also include any relevant history, such as previous diagnoses or treatments.
Clinical Information:
- •Specific diagnosis
- •Severity or frequency of symptoms
- •Relevant features of the disorder
- •Relevant history
- •Results of any relevant assessments or tests
Supporting Evidence:
- •Clinical notes
- •Psychiatric evaluations
- •Results of psychological tests
- •Records of previous treatments or hospitalizations
Good Documentation Example:
Patient diagnosed with generalized anxiety disorder, with severe, daily symptoms. History of previous hospitalization for panic attacks.
Poor Documentation Example:
Patient reports feeling anxious.
Common Documentation Errors:
- âš Not specifying the type of disorder
- âš Not indicating the severity or frequency of symptoms
- âš Not including relevant history
- âš Not providing supporting evidence
Range Statistics
7
Total Codes
60
Billable
Complexity:
Medium
Primary Use:Clinical Documentation
Chapter:5
Coding Complexity
Medium
Complexity Rating
Coding for F40-F48 can be complex due to the variety of disorders covered by this range. Coders must be able to differentiate between similar disorders and specify the type and severity of the disorder. They must also be aware of conditions that are better classified under other codes.
Key Factors:
- â–¸The variety of disorders covered by this range
- â–¸The need to specify the type and severity of the disorder
- â–¸The need to differentiate between similar disorders
- â–¸The need to exclude conditions better classified under other codes
Specialty Focus
F40-F48 codes are primarily used by psychiatrists and other mental health professionals. They may also be used by primary care providers when diagnosing or treating mental health conditions.
Primary Specialties:
Psychiatry
70%
Primary Care
30%
Clinical Scenarios:
- • A patient with a history of panic attacks is diagnosed with panic disorder.
- • A patient with persistent and excessive worry about various things is diagnosed with generalized anxiety disorder.
- • A patient with physical symptoms that cannot be explained by a medical condition is diagnosed with a somatoform disorder.
- • A patient who experienced a traumatic event develops post-traumatic stress disorder.
- • A patient with persistent and intrusive thoughts and repetitive behaviors is diagnosed with obsessive-compulsive disorder.
Resources & References
Resources for coding F40-F48 include the ICD-10 guidelines, clinical reference materials, and educational resources.
Official Guidelines:
- ICD-10-CM Official Guidelines for Coding and Reporting
- American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders (DSM-5)
- World Health Organization: International Classification of Diseases (ICD-10)
Clinical References:
- American Psychiatric Association: Practice Guidelines
- National Institute of Mental Health: Mental Health Information
Educational Materials:
- American Health Information Management Association: ICD-10-CM Coding Resources
- American Academy of Professional Coders: ICD-10-CM Code Set Training
Frequently Asked Questions
What is the difference between F41.1 (Generalized anxiety disorder) and F41.9 (Anxiety disorder, unspecified)?
F41.1 is used when the diagnosis is specifically generalized anxiety disorder, while F41.9 is used when an anxiety disorder is diagnosed but the specific type is not documented.