Alphabetic Index FY2027

F98.1

Encopresis not due to a substance or known physiological condition

FY2027Chapter 5: Mental, Behavioral and Neurodevelopmental disorders/F90–F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence

BillableComplete code, valid to report
Care settingsHome Health Primary · Behavioral HealthIPF Primary · MS-DRG 886

F98.1 (also written F981) is a billable ICD-10-CM diagnosis code for encopresis not due to a substance or known physiological condition. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 9 codes in category F98 (Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence). The Alphabetic Index lists it under 5 entries. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 6 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code to identify the cause of any coexisting constipation.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from F98 Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence
  • 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.-)
Also from chapter/block level (1 note)
Inherited from Chapter 5 Mental, Behavioral and Neurodevelopmental disorders
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Behavioral Health clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

IPF Primary

IPF MS-DRG adjustment. A principal diagnosis of this code groups to this MS-DRG:

MS-DRGDescriptionFactor
886Behavioral & developmental disorders1.07
A principal diagnosis that groups to none of the 19 designated MS-DRGs gets no MS-DRG adjustment. Otherwise the claim still receives the federal per diem base rate and the other adjustments.

Source: CMS IPF PPS FY 2027 final rule (CMS-1847-F), Addendum A; code lists from the CMS MS-DRG Definitions Manual v44; effective for discharges on or after October 1, 2026

Includes

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

Also from chapter/block level (1 note)
Inherited from Chapter 5 Mental, Behavioral and Neurodevelopmental disorders
  • disorders of psychological development

Inclusion terms

Conditions classified to this code.

This code
  • Functional encopresis
  • Incontinence of feces of nonorganic origin
  • Psychogenic encopresis

Notes

Also from chapter/block level (1 note)
Inherited from 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

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 5 entries