N13.73 – Vesicoureteral-reflux with reflux nephropathy with hydroureter

ICD-10-CM 2027 diagnosis code · Renal tubulo-interstitial diseases

Non-billable header

ICD-10-CM code N13.73

Code: N13.73 (claims format: N1373)
Description: Vesicoureteral-reflux with reflux nephropathy with hydroureter
Short description: Vesicoureteral-reflux w reflux nephropathy with hydroureter
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 14. Diseases of the genitourinary system (N00-N99)
Block: N10-N16 Renal tubulo-interstitial diseases
Parent codes: N13 › N13.7

Billable codes under N13.73

N13.73 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

N13 – Obstructive and reflux uropathy

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)

N13.7 – Vesicoureteral-reflux

Excludes1 (not coded here):

reflux-associated pyelonephritis (N11.0)

Block N10-N16

Includes:

pyelonephritis

Excludes1 (not coded here):

pyeloureteritis cystica (N28.85)

Related codes in N13.7

Frequently asked questions

What is ICD-10 code N13.73?

N13.73 is the ICD-10-CM code for vesicoureteral-reflux with reflux nephropathy with hydroureter, in the block N10-N16 (Renal tubulo-interstitial diseases).

Is N13.73 a billable code?

No. N13.73 is a header code with more specific child codes; report one of the billable codes listed above.

What category does N13.73 belong to?

It belongs to category N13 – Obstructive and reflux uropathy.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.