Alphabetic Index FY2027

N13

Obstructive and reflux uropathy

FY2027Chapter 14: Diseases of the genitourinary system/N10–N16 Renal tubulo-interstitial diseases

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

N13 is a non-billable ICD-10-CM code category for obstructive and reflux uropathy. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are N13.0 Hydronephrosis with ureteropelvic junction obstruction; N13.1 Hydronephrosis with ureteral stricture, not elsewhere classified; N13.2 Hydronephrosis with renal and ureteral calculous obstruction; N13.3 Other and unspecified hydronephrosis and 6 more. Its coding notes include 1 Excludes1 entry and 12 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Also from chapter/block level (1 note)
Inherited from N10–N16 Renal tubulo-interstitial diseases
  • pyeloureteritis cystica (N28.85)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • 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)
Also from chapter/block level (8 notes)
Inherited from Chapter 14 Diseases of the genitourinary system
  • 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)

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (1 note)
Inherited from N10–N16 Renal tubulo-interstitial diseases
  • pyelonephritis

More specific codes under N13 10