N99.521 Infection of incontinent external stoma of urinary tract

Billable ICD-10-CM code, FY2026.

Applies from N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified

Excludes2 (not included here)

• irradiation cystitis (N30.4-)
• postoophorectomy osteoporosis with current pathological fracture (M80.8-)
• postoophorectomy osteoporosis without current pathological fracture (M81.8)

Applies from N99.5 Complications of stoma of urinary tract

Excludes2 (not included here)

• mechanical complication of urinary catheter (T83.0-)

Risk adjustment (HCC)

• CMS-HCC V22: HCC 176 — Complications of Specified Implanted Device or Graft
• ESRD V24: HCC 176

MS-DRG index

Defines the logic of DRG(s) 698-700 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 997.5 Urinary complications, not elsewhere classified (approximate)

Code annotations containing back-references to N99.521

Back-references to N99.5

• Type 2 Excludes: T81 Complications of procedures, not elsewhere classified ("ostomy complications (J95.0-, K94.-, N99.5-)")
• Type 2 Excludes: T83.0 Mechanical complication of urinary catheter ("complications of stoma of urinary tract (N99.5-)")
• Type 2 Excludes: T83.51 Infection and inflammatory reaction due to urinary catheter ("complications of stoma of urinary tract (N99.5-)")
• Type 1 Excludes: Z43 Encounter for attention to artificial openings ("complications of external stoma (J95.0-, K94.-, N99.5-)")
• Type 1 Excludes: Z93 Artificial opening status ("complications of external stoma (J95.0-, K94.-, N99.5-)")

Back-references to N99

• Type 2 Excludes: T81 Complications of procedures, not elsewhere classified ("intraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-)")

Diagnosis Index entries for N99.521

• Complication (s) (from) (of) › stoma › urinary tract › incontinent › infection
• Complication (s) (from) (of) › stoma › urinary tract › infection

Nearby codes

• N99.511 Cystostomy infection
• N99.512 Cystostomy malfunction
• N99.518 Other cystostomy complication
• N99.52 Complication of incontinent external stoma of urinary tract
• N99.520 Hemorrhage of incontinent external stoma of urinary tract
• N99.521 Infection of incontinent external stoma of urinary tract (this code)
• N99.522 Malfunction of incontinent external stoma of urinary tract
• N99.523 Herniation of incontinent stoma of urinary tract
• N99.524 Stenosis of incontinent stoma of urinary tract
• N99.528 Other complication of incontinent external stoma of urinary tract
• N99.53 Complication of continent stoma of urinary tract