N21
N21 — Calculus of lower urinary tract
Non-billable headerICD-10-CM
N21 is a non-billable header ICD-10-CM code for calculus of lower urinary tract. It cannot be billed on its own: choose one of the more specific child codes below.
Includes
Conditions this code covers.
- calculus of lower urinary tract with cystitis and urethritis
Risk adjustment
N21 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 N21
4 child codes. Green means billable.
Questions about N21
- Is N21 a billable ICD-10-CM code?
- No. N21 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does N21 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Urolithiasis (N20-N23).