FY2018
Effective from
- Inherited rules changed
Hydronephrosis with ureteropelvic junction obstruction
Billable diagnosis code
CDC/NCHS · FY2018pyeloureteritis cystica (N28.85)
Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)
Coverage depends on the payer, service and applicable policy. A billable code does not guarantee payment.
For US diagnosis claims covered by HIPAA, ICD-10-CM is required from October 1, 2015.
Use the service date for outpatient/professional claims and the discharge date for hospital inpatient claims. Earlier encounters use ICD-9-CM; each individual code must also be valid for the applicable date.
Official coding guidelines → · CMS ↗Grouping depends on the complete encounter and CMS grouper logic.
2026-04-01 – 2026-09-30
CMS · MS-DRG 43.1First observed · 2016-10-01
Latest recorded change · FY2018
Effective from
Hydronephrosis with ureteropelvic junction obstruction
Billable diagnosis code
CDC/NCHS · FY2018| All editions | Effective from | Code history |
|---|---|---|
| FY2017 | 2016-10-01 | Added |
| FY2018 | 2017-10-01 | Inherited rules changed |
| FY2019 | 2018-10-01 | No tabular change |
| FY2020 | 2019-10-01 | No tabular change |
| FY2020 · April | 2020-04-01 | No tabular change |
| FY2021 | 2020-10-01 | No tabular change |
| FY2021 · 01-01 | 2021-01-01 | No tabular change |
| FY2022 | 2021-10-01 | No tabular change |
| FY2022 · 04-01 | 2022-04-01 | No tabular change |
| FY2023 | 2022-10-01 | No tabular change |
| FY2023 · 04-01 | 2023-04-01 | No tabular change |
| FY2024 | 2023-10-01 | No tabular change |
| FY2024 · 04-01 | 2024-04-01 | No tabular change |
| FY2025 | 2024-10-01 | No tabular change |
| FY2025 · 04-01 | 2025-04-01 | No tabular change |
| FY2026 | 2025-10-01 | No tabular change |
| FY2026 · April | 2026-04-01 | No tabular change |
| FY2027 | 2026-10-01 | No tabular change |
Historical mapping only; not an automatic code substitution.
Hydronephrosis due to acquired occlusion of ureteropelvic junction
Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)
pyelonephritis
pyeloureteritis cystica (N28.85)
Historical assignments from the CDC conversion table support data retrieval. They do not authorize substituting a previous code for the current code.
Previous assignment: N13.1
Other entries in the same category; these are not automatic substitutes.
| Code | Description | Category · further specificity required |
|---|---|---|
| N13.1 | Hydronephrosis with ureteral stricture, not elsewhere classified | Billable / specific |
| N13.2 | Hydronephrosis with renal and ureteral calculous obstruction | Billable / specific |
| N13.3 | Other and unspecified hydronephrosis | Category · further specificity required |
| N13.4 | Hydroureter | Billable / specific |
| N13.5 | Crossing vessel and stricture of ureter without hydronephrosis | Billable / specific |
| N13.6 | Pyonephrosis | Billable / specific |
| N13.7 | Vesicoureteral-reflux | Category · further specificity required |
| N13.8 | Other obstructive and reflux uropathy | Billable / specific |
| N13.9 | Obstructive and reflux uropathy, unspecified | Billable / specific |
Official titles and instructions are preserved in their source language. Official sources ↗