F41.9 ICD-10-CM Code: Anxiety disorder, unspecified
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FY 2026 Apr update / Mental, Behavioral and Neurodevelopmental disorders (F01-F99) / Anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (F40-F48)
F41.9
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAnxiety disorder, unspecified
This code is used when a patient has an anxiety disorder but the specific type cannot be determined or is not documented.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
Official- Anxiety NOS
Excludes 2
Official- anxiety in:
- acute stress reaction (F43.0)
- transient adjustment reaction (F43.2)
- neurasthenia (F48.8)
- psychophysiologic disorders (F45.-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for F41.9 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for F41.9 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for F41.9 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for F41.9 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for F41.9 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is F41.9 an HCC code?
No. F41.9 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- F41.9
- Description
- Anxiety disorder, unspecified
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
F41.9 is the ICD-10-CM diagnosis code for anxiety disorder, unspecified. This code is used when a patient has an anxiety disorder but the specific type cannot be determined or is not documented. F41.9 sits in the ICD-10-CM chapter for mental, behavioral and neurodevelopmental disorders (f01-f99), within the section covering anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders (f40-f48).
F41.9 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Avoid using this code if the specific anxiety disorder type can be identified from documentation.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for F41.9 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Avoid using this code if the specific anxiety disorder type can be identified from documentation
- •Query the provider for clarification on the type of anxiety disorder when possible