Is R23 a billable ICD-10-CM code?

No. R23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does R23 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the skin and subcutaneous tissue (R20-R23).

R23

R23 — Other skin changes

Non-billable headerICD-10-CM

R23 is a non-billable header ICD-10-CM code for other skin changes. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with R23

These codes carry an Excludes1 note pointing at R23. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R23 alone.

R21Rash and other nonspecific skin eruption

Risk adjustment

R23 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 R23

7 child codes. Green means billable.

Questions about R23

Is R23 a billable ICD-10-CM code?: No. R23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does R23 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving the skin and subcutaneous tissue (R20-R23).