2027 ICD-10-CM Diagnosis Code F98.9Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence

ICD-10-CM Codes›F01–F99›F90-F98›F98

ICD-10-CM F98.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

F98.9 is a billable ICD-10-CM diagnosis code for unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 886. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Miscellaneous mental and behavioral disorders/conditions.

Code Identity

ICD-10-CM Code
F98.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence
Short Description
Unsp behav/emotn disord w onst usly occur in chldhd and adol
Parent Code
F98
Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Code Classification

ChapterF01–F99Mental and behavioural disorders
SectionF90-F98Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
CategoryF98Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence
This CodeF98.9Unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adolescent behavior alteration
  • Axis II diagnosis
  • Axis IV diagnosis
  • Axis V diagnosis
  • Behavioral and emotional disorder with onset in childhood
  • Childhood disorder of conduct and emotion
  • Chronic mental disorder
  • Conduct disorder, childhood-onset type
  • Deferred diagnosis on Axis II
  • Deferred diagnosis on Axis IV
  • Hypersomnia disorder related to another mental disorder
  • Insomnia disorder related to another mental disorder
  • Mental disorder
  • Mental disorder in adolescence
  • Mental disorder in childhood
  • On severe mental illness register
  • Psychiatric behavioral disability
  • Psychiatric treatment changed
  • Psychiatric treatment started

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to F98.9: its own notes plus those printed at F98, block F90-F98, and Chapter 5. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • disorders of psychological development

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence applies to 9 codes
  • breath-holding spells (R06.89)
  • gender identity disorder of childhood (F64.2)
  • Kleine-Levin syndrome (G47.13)
  • obsessive-compulsive disorder (F42.-)
  • sleep disorders not due to a substance or known physiological condition (F51.-)
From Chapter 5 (F01-F99) Mental and behavioural disorders applies to 872 codes
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Notes

General instructions on how these codes are used.

From Block F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence applies to 33 codes
  • Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name F98.9, its category, or a range that includes it.

Notes 1

These notes mention F98.9.

  • Block F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
    Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood names F90-F98, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MBD013
Miscellaneous mental and behavioral disorders/conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Child Behavior Disorders

All kids misbehave some times. And some may have temporary behavior problems due to stress. For example, the birth of a sibling, a divorce, or a death in the family may cause a child to act out. Behavior disorders are more serious. They involve a pattern of hostile, aggressive, or disruptive behaviors for more than 6 months.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert F98.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
313.9 Emotional dis child NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About F98.9Overview

Is F98.9 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does F98.9 group to?

When unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence is the principal diagnosis on an inpatient stay, it groups to MS-DRG 886 (behavioral and Developmental Disorders), which carries a relative weight of 1.6455. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of F98.9?

Under the General Equivalence Mappings, unspecified behavioral and emotional disorders with onset usually occurring in childhood and adolescence converts to ICD-9-CM 313.9 (emotional dis child NOS). The mapping is approximate, so confirm the match fits the documentation.