N13.1 is the authoritative medical code for Hydronephrosis with ureteral stricture, not elsewhere classified. This classification is used in medical billing and clinical recording to specify the clinical criteria for hydronephrosis with ureteral stricture, not elsewhere classified (ICD-10-CM N13.1), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Hydronephrosis with ureteral stricture, not elsewhere classified is a billable ICD-10-CM diagnosis code N13.1. Includes: pyelonephritis. Excludes1 (not coded here): Hydronephrosis with ureteral stricture with infection N13.6; pyeloureteritis cystica N28.85. Excludes2 (not included here): calculus of kidney and ureter without hydronephrosis N20.-; congenital obstructive defects of renal pelvis and ureter Q62.0-Q62.3; hydronephrosis with ureteropelvic junction obstruction Q62.11; obstructive pyelonephritis N11.1.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for N13.1 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- Hydronephrosis with ureteral stricture with infection N13.6
- pyeloureteritis cystica N28.85
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- calculus of kidney and ureter without hydronephrosis N20.-
- congenital obstructive defects of renal pelvis and ureter Q62.0-Q62.3
- hydronephrosis with ureteropelvic junction obstruction Q62.11
- obstructive pyelonephritis N11.1
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with N13.1?
Per Excludes1 instructions, N13.1 must not be reported with: Hydronephrosis with ureteral stricture with infection (N13.6); pyeloureteritis cystica (N28.85).
Can N13.1 be reported alongside related conditions?
Per Excludes2 instructions, N13.1 and the following may both be reported when both are present: calculus of kidney and ureter without hydronephrosis (N20.-); congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3); hydronephrosis with ureteropelvic junction obstruction (Q62.11); obstructive pyelonephritis (N11.1).
Codes in This Family (22)
Official ICD-10-CM classifications in the same code family as N13.1, with their registry titles.
- N13 — Obstructive and reflux uropathy
- N13.0 — Hydronephrosis with ureteropelvic junction obstruction
- N13.2 — Hydronephrosis with renal and ureteral calculous obstruction
- N13.3 — Other and unspecified hydronephrosis
- N13.30 — Unspecified hydronephrosis
- N13.39 — Other hydronephrosis
- N13.4 — Hydroureter
- N13.5 — Crossing vessel and stricture of ureter without hydronephrosis
- N13.6 — Pyonephrosis
- N13.7 — Vesicoureteral-reflux
- N13.70 — Vesicoureteral-reflux, unspecified
- N13.71 — Vesicoureteral-reflux without reflux nephropathy
- N13.72 — Vesicoureteral-reflux with reflux nephropathy without hydroureter
- N13.721 — Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
- N13.722 — Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
- N13.729 — Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
- N13.73 — Vesicoureteral-reflux with reflux nephropathy with hydroureter
- N13.731 — Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
- N13.732 — Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
- N13.739 — Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
- N13.8 — Other obstructive and reflux uropathy
- N13.9 — Obstructive and reflux uropathy, unspecified
Indexed Clinical Terms (5)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Hydronephrosis NEC (atrophic) (early) (functionless) (intermittent) (primary) (secondary), with, obstruction (by) (of), ureteral NEC
- Hydronephrosis NEC (atrophic) (early) (functionless) (intermittent) (primary) (secondary), with, ureteral stricture NEC
- Kink, kinking, ureter (pelvic junction), with, hydronephrosis
- Obstruction, obstructed, obstructive, ureter NEC (functional) (pelvic junction), with, hydronephrosis
- Stricture, ureter (postoperative), with, hydronephrosis
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code N14.1
Nephropathy induced by other drugs, medicaments and biological substances