R50 — Fever of other and unknown origin
Is R50 billable?
No — R50 is a non-billable header code. R50 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 R50.
R50 at a glance
| Code | R50 |
|---|---|
| Description | Fever of other and unknown origin |
| 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 R50 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 — inherited from Chapter 18
The conditions below are not part of R50, but a patient may have both at the same time. When documentation supports it, R50 and the excluded code may both be reported.
What codes fall under R50? (3)
How long has R50 existed?
R50 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 R50?
ICD-10-CM declares these codes mutually exclusive with R50 — exactly one of each pair can be correct for a given encounter.