Alphabetic Index FY2027

F89

Unspecified disorder of psychological development

FY2027Chapter 5: Mental, Behavioral and Neurodevelopmental disorders/F80–F89 Pervasive and specific developmental disorders

BillableComplete code, valid to report
Care settingsIPF Primary · MS-DRG 886

F89 is a billable ICD-10-CM diagnosis code for unspecified disorder of psychological development. It is part of the FY2027 code set, effective October 1, 2026. The Alphabetic Index lists it under 2 entries. Its coding notes include 1 Excludes2 entry.

Excludes2

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

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.

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
  • Developmental disorder NOS
  • Neurodevelopmental disorder NOS

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 2 entries