N99.521 — Infection of incontinent external stoma of urinary tract
Is N99.521 billable?
Yes — N99.521 is billable for FY2027. N99.521 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. N99.521 may be submitted for encounters from October 1, 2026 through September 30, 2027.
N99.521 at a glance
| Code | N99.521 |
|---|---|
| Description | Infection of incontinent external stoma of urinary tract |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does N99.521 group to?
N99.521 sits in MDC 11 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 698Other Kidney and Urinary Tract Diagnoses with MCCmedical
- 699Other Kidney and Urinary Tract Diagnoses with CCmedical
- 700Other Kidney and Urinary Tract Diagnoses without CC/MCCmedical
How is N99.521 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N99.521. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Complication › stoma › urinary tract › infection (s) (from) (of)
- Complication › stoma › urinary tract › incontinent › infection (s) (from) (of)
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N99.521, but a patient may have both at the same time. When documentation supports it, N99.521 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Excludes2 — not included here — inherited from N99
The conditions below are not part of N99.521, but a patient may have both at the same time. When documentation supports it, N99.521 and the excluded code may both be reported.
Excludes2 — not included here — inherited from N99.5
The conditions below are not part of N99.521, but a patient may have both at the same time. When documentation supports it, N99.521 and the excluded code may both be reported.
- mechanical complication of urinary catheter (T83.0-)
How long has N99.521 existed?
N99.521 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2018Infection of other external stoma of urinary tractInfection of incontinent external stoma of urinary tract
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
What other codes are in the N99.52 family? (5)
- N99.520Hemorrhage of incontinent external stoma of urinary tract
- N99.522Malfunction of incontinent external stoma of urinary tract
- N99.523Herniation of incontinent stoma of urinary tract
- N99.524Stenosis of incontinent stoma of urinary tract
- N99.528Other complication of incontinent external stoma of urinary tract