Is R91 a billable ICD-10-CM code?

No. R91 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R91 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94).

R91

R91 — Abnormal findings on diagnostic imaging of lung

Non-billable headerICD-10-CM

R91 is a non-billable header ICD-10-CM code for abnormal findings on diagnostic imaging of lung. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

R91 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead R91

2 child codes. Green means billable.

R91.1Solitary pulmonary nodule
R91.8Other nonspecific abnormal finding of lung field

Questions about R91

Is R91 a billable ICD-10-CM code?: No. R91 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R91 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94).