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ICD-10-CM 2027 diagnosis code

F41.1Generalized anxiety disorder

✓ Billable / specific

F41.1 is a valid, billable ICD-10-CM code for generalized anxiety disorder. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS, effective October 1, 2026. Updated September 29, 2026. About our data

About F41.1

F41.1 is the ICD-10-CM diagnosis code for generalized anxiety disorder. It belongs to category F41 (other anxiety disorders), block F40-F48 (anxiety, dissociative, stress-related, somatoform and other nonpsychotic mental disorders) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F41 (other anxiety disorders), F41.1 is specifically for generalized anxiety disorder. Related codes cover panic disorder [episodic paroxysmal anxiety] (F41.0), other mixed anxiety disorders (F41.3), other specified anxiety disorders (F41.8) and anxiety disorder, unspecified (F41.9).

The conditions in its Excludes2 note aren't part of F41.1, but may be coded alongside it if the patient has both: neurasthenia (F48.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction, relative weight 0.9306), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 300.02 (generalized anxiety disorder).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Anxiety neurosis
  • Anxiety reaction
  • Anxiety state
  • Overanxious disorder
Excludes2Not included here — may be reported together if both conditions exist

Notes that apply from higher levels

Instructions written at a parent level also apply to F41.1.

› From F41 Other anxiety disorders
Excludes2
  • anxiety in:
  • acute stress reaction (F43.0)
  • transient adjustment reaction (F43.2)
  • neurasthenia (F48.8)
  • psychophysiologic disorders (F45.-)
  • separation anxiety (F93.0)

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

12 entries

Terms in the official ICD-10-CM index that lead to F41.1.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 300.02Generalized anxiety disorderexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about F41.1

Is F41.1 billable?

Yes. F41.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F41.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F41.1 as a principal diagnosis.

Is F41.1 a CC or MCC?

No. F41.1 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F41.1 group to?

F41.1 is used in the MS-DRG v44.0 logic for MS-DRG 880 (Acute Adjustment Reaction and Psychosocial Dysfunction). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for F41.1?

The CMS General Equivalence Mappings map F41.1 to ICD-9-CM 300.02.