R91 — Abnormal findings on diagnostic imaging of lung
Is R91 billable?
No — R91 is a non-billable header code. R91 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 2 billable codes beneath R91.
Billable codes under this header
R91 at a glance
| Code | R91 |
|---|---|
| Description | Abnormal findings on diagnostic imaging of lung |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together — inherited from R90-R94
The conditions below can never be reported together with R91 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R91, but a patient may have both at the same time. When documentation supports it, R91 and the excluded code may both be reported.
What codes fall under R91? (2)
How long has R91 existed?
R91 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.