N99.518 — Other cystostomy complication
N99.518 is a billable, specific ICD-10-CM code for other cystostomy complication. It is valid for submission on a claim.
Risk adjustment
N99.518 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.
Medicare coverage
N99.518 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56421Billing and Coding: CT of the Abdomen and Pelvis
How N99.518 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to N99.518.
- Complication›cystostomy(stoma)
- Complication›cystostomy›specified type NEC
Related codes at this level
Codes that share N99.51. If N99.518 is not quite right, the correct code is usually one of these.
Questions about N99.518
- Is N99.518 a billable ICD-10-CM code?
- Yes. N99.518 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does N99.518 sit in the tabular list?
- Diseases of the genitourinary system (N00-N99), in the block Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified (N99).