N28.85 — Pyeloureteritis cystica
Is N28.85 billable?
Yes — N28.85 is billable for FY2027. N28.85 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. N28.85 may be submitted for encounters from October 1, 2026 through September 30, 2027.
N28.85 at a glance
| Code | N28.85 |
|---|---|
| Description | Pyeloureteritis cystica |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does N28.85 group to?
N28.85 sits in MDC 11 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 689Kidney and Urinary Tract Infections with MCCmedical
- 690Kidney and Urinary Tract Infections without MCCmedical
As a secondary diagnosis, N28.85 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG. It also carries Hospital-Acquired Condition category 06.
How is N28.85 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to N28.85. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Pyeloureteritis cystica
- Infection, infected, infective › kidney › pelvis and ureter (opportunistic)
- Infection, infected, infective › renal › pelvis and ureter (opportunistic)
Excludes1 — never code together — inherited from N28.8
The conditions below can never be reported together with N28.85 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N28.85, but a patient may have both at the same time. When documentation supports it, N28.85 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 N25-N29
The conditions below are not part of N28.85, but a patient may have both at the same time. When documentation supports it, N28.85 and the excluded code may both be reported.
- disorders of kidney and ureter with urolithiasis (N20-N23)
How long has N28.85 existed?
N28.85 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.