F91 — Conduct disorders
Is F91 billable?
No — F91 is a non-billable header code. F91 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 6 billable codes beneath F91.
F91 at a glance
| Code | F91 |
|---|---|
| Description | Conduct disorders |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with F91 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here
The conditions below are not part of F91, but a patient may have both at the same time. When documentation supports it, F91 and the excluded code may both be reported.
Excludes2 — not included here — inherited from Chapter 5
The conditions below are not part of F91, but a patient may have both at the same time. When documentation supports it, F91 and the excluded code may both be reported.
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
What codes fall under F91? (6)
How long has F91 existed?
F91 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 F91?
ICD-10-CM declares these codes mutually exclusive with F91 — exactly one of each pair can be correct for a given encounter.