F89 — Unspecified disorder of psychological development
Is F89 billable?
Yes, but F89 is an unspecified code. F89 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, F89 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting F89.
F89 at a glance
| Code | F89 |
|---|---|
| Description | Unspecified disorder of psychological development |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does F89 group to?
F89 sits in MDC 19 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 886Behavioral and Developmental Disordersmedical
How is F89 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to F89. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Disorder › developmental (of)
- Disorder › neurodevelopmental (of)
Inclusion terms
Alternative wording in documentation that is classified to F89.
- Developmental disorder NOS
- Neurodevelopmental disorder NOS
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F89, but a patient may have both at the same time. When documentation supports it, F89 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
How long has F89 existed?
F89 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with F89?
ICD-10-CM declares these codes mutually exclusive with F89 — exactly one of each pair can be correct for a given encounter.