F98.5 Adult onset fluency disorder

✓ Billable ICD-10-CM 2026
Open F98.5 in Web App →

The ICD-10-CM code for Adult onset fluency disorder is F98.5 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
F90-F98: Behavioral and emotional disorders with onset usually occurring in childhood and adolescence (F90-F98)
Category F98
11 codes (9 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F98.5:

  • Stuttering › adult onset
  • Disorder (of) › fluency › adult onset
Excludes1
Not coded here. These conditions should NOT be coded together with F98.5.
  • childhood onset fluency disorder (F80.81)
  • dysphasia (R47.02)
  • fluency disorder in conditions classified elsewhere (R47.82)
  • fluency disorder (stuttering) following cerebrovascular disease (I69. with final characters -23)
  • tic disorders (F95.-)

U.S. Hospital Utilization

  • An estimated 590 U.S. inpatient stays in 2023 included F98.5 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Pain disorders related to psychological factors (TOC entry)

a. Pain disorders related to psychological factors ..................................................................... 43

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.5.a
Psychoactive substance use disorders (TOC entry)

b. Mental and behavioral disorders due to psychoactive substance use ................................... 43

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.5.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Related Codes in F98

F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence F98.0 Enuresis not due to a substance or known physiological condition F98.1 Encopresis not due to a substance or known physiological condition F98.2 Other feeding disorders of infancy and childhood F98.21 Rumination disorder of infancy and childhood F98.29 Other feeding disorders of infancy and early childhood F98.3 Pica of infancy and childhood F98.4 Stereotyped movement disorders F98.8 Other specified behavioral and emotional disorders with onset usually occurring in childhood and adolescence F98.9 Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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