ICD-10-CM F41.9
ICD-10 Code F41.9: Anxiety disorder, unspecified
F41.9 is the ICD-10-CM code for anxiety disorder, unspecified. DSM-5-TR uses it for unspecified anxiety disorder - clinically significant anxiety that does not meet full criteria for a specific anxiety disorder, or where there is not yet enough information.
- Official description
- Anxiety disorder, unspecified
- Billable
- Yes
- Parent category
- F41 · Other anxiety disorders
- DSM-5-TR name
- Unspecified anxiety disorder
Verified against the FY2027 ICD-10-CM code set (CDC/NCHS and CMS), effective October 1, 2026 - September 30, 2027, on . Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99).
Coding notes for F41.9
- Move to a specific code such as F41.1 once the diagnosis is clear
- Other specified anxiety disorder is F41.8
- Some payers look harder at unspecified codes used over many sessions
What to document for medical necessity
Payers look for a record that supports the diagnosis and the level of care. For anxiety and obsessive-compulsive disorders that usually means:
- The specific symptoms, triggers, and how long they have been present
- A scored measure where one fits, such as the GAD-7 or a panic or OCD severity scale
- Avoidance, safety behaviors, or rituals and the time they take
- Functional impairment the anxiety causes
- Treatment plan goals tied to measurable change in those symptoms
CPT codes often billed with F41.9
The ICD-10 code says why you are treating the client and the CPT code says what you did. These are the service codes most often paired with F41.9:
Free templates for this diagnosis
Related ICD-10 codes
Frequently asked questions
Is F41.9 billable?
Yes. F41.9 is a billable ICD-10-CM code. Some payers question it when it stays on a claim for a long course of treatment, so update it when you can be more specific.
What is the difference between F41.9 and F41.8?
F41.8 is other specified anxiety disorders, used when you name the specific reason criteria are not met. F41.9 is unspecified, used when you do not.
This page is a coding reference, not clinical, diagnostic, billing, or legal advice. The diagnosis is the treating clinician's call, and payer rules vary - always confirm against the current ICD-10-CM code set and official guidelines and your payer's policy. See the full mental health ICD-10 code list.