Is R94 a billable ICD-10-CM code?

No. R94 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R94 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).

R94

R94 — Abnormal results of function studies

Non-billable headerICD-10-CM

R94 is a non-billable header ICD-10-CM code for abnormal results of function studies. It cannot be billed on its own: choose one of the more specific child codes below.

Includes

Conditions this code covers.

abnormal results of radionuclide [radioisotope] uptake studies
abnormal results of scintigraphy

Other codes that can never be billed with R94

These codes carry an Excludes1 note pointing at R94. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R94 alone.

R94.131Abnormal electromyogram [EMG]
T88.7Unspecified adverse effect of drug or medicament
T88.7XXAUnspecified adverse effect of drug or medicament, initial encounter
T88.7XXDUnspecified adverse effect of drug or medicament, subsequent encounter
T88.7XXSUnspecified adverse effect of drug or medicament, sequela

Risk adjustment

R94 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 R94

9 child codes. Green means billable.

Questions about R94

Is R94 a billable ICD-10-CM code?: No. R94 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R94 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).