N13.6 Pyonephrosis

BillableNo payment HCCChapter 14

Check coverage with this diagnosis

Instructional notes

Chapter 14

Excludes2Not included here: the patient may have both; report both when both are present.

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)

Section N10-N16

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

pyeloureteritis cystica (N28.85)

Includes

pyelonephritis

N13

Excludes2Not included here: the patient may have both; report both 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)

This code

Use additional codeAdd a second code for the full picture.

code (B95-B97), to identify infectious agent.

Inclusion terms

Conditions in N13.0-N13.5 with infection
Obstructive uropathy with infection

Chapter 14: Diseases of the genitourinary system · N10-N16 Renal tubulo-interstitial diseases (N10-N16)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.