Skip to content
Dx

ICD-10-CM 2027 diagnosis code

F89Unspecified disorder of psychological development

✓ Billable / specific

F89 is a valid, billable ICD-10-CM code for unspecified disorder of psychological development. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Developmental disorder, ICD-10 code for Neurodevelopmental disorder.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F89

F89 is the ICD-10-CM diagnosis code for unspecified disorder of psychological development. It belongs to block F80-F89 (pervasive and specific developmental 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.

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 886 (Behavioral and Developmental Disorders, relative weight 1.8678), 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 315.9 (unspecified delay in development).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Developmental disorder NOS
  • Neurodevelopmental disorder NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to F89.

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

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to F89.

Codes whose notes reference F89

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.

MDC 19 · Mental Diseases and Disorders

ICD-9-CM equivalent

Converter →
  • 315.9Unspecified delay in developmentapproximate

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 F89

Is F89 billable?

Yes. F89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F89 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F89 as a principal diagnosis.

Is F89 a CC or MCC?

No. F89 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F89 group to?

F89 is used in the MS-DRG v44.0 logic for MS-DRG 886 (Behavioral and Developmental Disorders). 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 F89?

The CMS General Equivalence Mappings map F89 to ICD-9-CM 315.9.