ICD-10-CM Codes
N00-N99 Diseases of the genitourinary system
N10-N16 Renal tubulo-interstitial diseases
N13- Obstructive and reflux uropathy
2021 ICD-10-CM Diagnosis Code N13.6

2021 ICD-10-CM Diagnosis Code N13.6

Pyonephrosis

2016

2017

2018

2019

2020

2021

Billable/Specific Code

N13.6 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM N13.6 became effective on October 1, 2020.
This is the American ICD-10-CM version of N13.6 - other international versions of ICD-10 N13.6 may differ.

Applicable To

Conditions in
ICD-10-CM Diagnosis Code N13.0
Hydronephrosis with ureteropelvic junction obstruction
Applicable To
- Hydronephrosis due to acquired occlusion of ureteropelvic junction
Type 2 Excludes
- Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)
N13.0-
ICD-10-CM Diagnosis Code N13.5
Crossing vessel and stricture of ureter without hydronephrosis
Applicable To
- Kinking and stricture of ureter without hydronephrosis
Type 1 Excludes
- Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
N13.5
with infection
Obstructive uropathy with infection

Use Additional

Use Additional Help

Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

code (B95-B97
ICD-10-CM Range B95-B97
Bacterial and viral infectious agents
Note
- These categories are provided for use as supplementary or additional codes to identify the infectious agent(s) in diseases classified elsewhere.
- B95 Streptococcus, Staphylococcus, and Enter...
- B96 Other bacterial agents as the cause of d...
- B97 Viral agents as the cause of diseases cl...
), to identify infectious agent.

The following code(s) above N13.6 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to N13.6:

N00-N99
2021 ICD-10-CM Range N00-N99
Diseases of the genitourinary system
Type 2 Excludes
- 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)
Diseases of the genitourinary system
N10-N16
2021 ICD-10-CM Range N10-N16
Renal tubulo-interstitial diseases
Includes
- pyelonephritis
Type 1 Excludes
- pyeloureteritis cystica (N28.85)
Renal tubulo-interstitial diseases
N13
ICD-10-CM Diagnosis Code N13
Obstructive and reflux uropathy
Type 2 Excludes
- 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)
Obstructive and reflux uropathy

Clinical Information

Distention of kidney with the presence of pus and suppurative destruction of the renal parenchyma. It is often associated with renal obstruction and can lead to total or nearly total loss of renal function.

ICD-10-CM N13.6 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

689 Kidney and urinary tract infections with mcc
690 Kidney and urinary tract infections without mcc
791 Prematurity with major problems
793 Full term neonate with major problems

Convert N13.6 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Code annotations containing back-references to N13.6:

Type 1 Excludes: N13.1
, N13.2
, N13.3
, N13.4
, N13.5
, M72.8

ICD-10-CM Diagnosis Code N13.1
Hydronephrosis with ureteral stricture, not elsewhere classified
Type 1 Excludes
- Hydronephrosis with ureteral stricture with infection (N13.6)
ICD-10-CM Diagnosis Code N13.2
Hydronephrosis with renal and ureteral calculous obstruction
Type 1 Excludes
- Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
ICD-10-CM Diagnosis Code N13.3
Other and unspecified hydronephrosis
Type 1 Excludes
- hydronephrosis with infection (N13.6)
ICD-10-CM Diagnosis Code N13.4
Hydroureter
Type 1 Excludes
- congenital hydroureter (Q62.3-)
- hydroureter with infection (N13.6)
- vesicoureteral-reflux with hydroureter (N13.73-)
ICD-10-CM Diagnosis Code N13.5
Crossing vessel and stricture of ureter without hydronephrosis
Applicable To
- Kinking and stricture of ureter without hydronephrosis
Type 1 Excludes
- Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
ICD-10-CM Diagnosis Code M72.8
Other fibroblastic disorders
Applicable To
- Abscess of fascia
- Fasciitis NEC
- Other infective fasciitis
Type 1 Excludes
- diffuse (eosinophilic) fasciitis (M35.4)
- necrotizing fasciitis (M72.6)
- nodular fasciitis (M72.4)
- perirenal fasciitis NOS (N13.5)
- perirenal fasciitis with infection (N13.6)
- plantar fasciitis (M72.2)
Use Additional
- code to (B95.-, B96.-) identify causative organism

Diagnosis Index entries containing back-references to N13.6:

Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
ICD-10-CM Diagnosis Code L02.91
Cutaneous abscess, unspecified
- kidney N15.1
  ICD-10-CM Diagnosis Code N15.1
  Renal and perinephric abscess
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  - with calculus N20.0
    ICD-10-CM Diagnosis Code N20.0
    Calculus of kidney
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    Nephrolithiasis NOS
    Renal calculus
    Renal stone
    Staghorn calculus
    Stone in kidney
    - with hydronephrosis N13.6
Angulation
- ureter N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Calculus, calculi, calculous
- pyelitis (impacted) (recurrent) N20.0
  ICD-10-CM Diagnosis Code N20.0
  Calculus of kidney
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Nephrolithiasis NOS
  Renal calculus
  Renal stone
  Staghorn calculus
  Stone in kidney
  - with hydronephrosis N13.6
- pyelonephritis (impacted) (recurrent)
  - with hydronephrosis N13.6
- ureter (impacted) (recurrent) N20.1
  ICD-10-CM Diagnosis Code N20.1
  Calculus of ureter
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Calculus of the ureteropelvic junction
  Ureteric stone
  - with calculus, kidney N20.2
    ICD-10-CM Diagnosis Code N20.2
    Calculus of kidney with calculus of ureter
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    - with hydronephrosis N13.2
      ICD-10-CM Diagnosis Code N13.2
      Hydronephrosis with renal and ureteral calculous obstruction
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
      - with infection N13.6
- urinary (duct) (impacted) (passage) (tract) N20.9
  ICD-10-CM Diagnosis Code N20.9
  Urinary calculus, unspecified
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  - with hydronephrosis N13.2
    ICD-10-CM Diagnosis Code N13.2
    Hydronephrosis with renal and ureteral calculous obstruction
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Type 1 Excludes
    Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
    - with infection N13.6
Constriction - see also Stricture
- ureter N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Contraction(s)
- ureterovesical orifice (postinfectional) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Fasciitis M72.9
ICD-10-CM Diagnosis Code M72.9
Fibroblastic disorder, unspecified
Applicable To
Fasciitis NOS
Fibromatosis NOS
- perirenal (with ureteral obstruction) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Fibrosis, fibrotic
- retroperitoneal, idiopathic (with ureteral obstruction) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Hydronephrosis (atrophic) (early) (functionless) (intermittent) (primary) (secondary) N13.30
ICD-10-CM Diagnosis Code N13.30
Unspecified hydronephrosis
- with
  - obstruction (by) (of)
    - renal calculus N13.2
      ICD-10-CM Diagnosis Code N13.2
      Hydronephrosis with renal and ureteral calculous obstruction
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
      - with infection N13.6
    - ureteral NEC N13.1
      ICD-10-CM Diagnosis Code N13.1
      Hydronephrosis with ureteral stricture, not elsewhere classified
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with ureteral stricture with infection (N13.6)
      - calculus N13.2
        ICD-10-CM Diagnosis Code N13.2
        Hydronephrosis with renal and ureteral calculous obstruction
        2016 2017 2018 2019 2020 2021 Billable/Specific Code
        Type 1 Excludes
        Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
        with infection N13.6
      - with infection N13.6
    - ureteropelvic junction (congenital) Q62.11
      ICD-10-CM Diagnosis Code Q62.11
      Congenital occlusion of ureteropelvic junction
      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      - acquired N13.0
        ICD-10-CM Diagnosis Code N13.0
        Hydronephrosis with ureteropelvic junction obstruction
        2017 - New Code 2018 2019 2020 2021 Billable/Specific Code
        Applicable To
        Hydronephrosis due to acquired occlusion of ureteropelvic junction
        Type 2 Excludes
        Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)
        with infection N13.6
  - ureteral stricture NEC N13.1
    ICD-10-CM Diagnosis Code N13.1
    Hydronephrosis with ureteral stricture, not elsewhere classified
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Type 1 Excludes
    Hydronephrosis with ureteral stricture with infection (N13.6)
    - with infection N13.6
  - infection N13.6
Hydropyonephrosis N13.6
Hydroureter N13.4
- see also Hydronephrosis
ICD-10-CM Diagnosis Code N13.4
Hydroureter
Type 1 Excludes
congenital hydroureter (Q62.3-)
hydroureter with infection (N13.6)
vesicoureteral-reflux with hydroureter (N13.73-)
- with infection N13.6
Infection, infected, infective (opportunistic) B99.9
ICD-10-CM Diagnosis Code B99.9
Unspecified infectious disease
- kidney (cortex) (hematogenous) N15.9
  ICD-10-CM Diagnosis Code N15.9
  Renal tubulo-interstitial disease, unspecified
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Infection of kidney NOS
  Type 1 Excludes
  urinary tract infection NOS (N39.0)
  - with calculus N20.0
    ICD-10-CM Diagnosis Code N20.0
    Calculus of kidney
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    Nephrolithiasis NOS
    Renal calculus
    Renal stone
    Staghorn calculus
    Stone in kidney
    - with hydronephrosis N13.6
Kink, kinking
- ureter (pelvic junction) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with
    - hydronephrosis N13.1
      ICD-10-CM Diagnosis Code N13.1
      Hydronephrosis with ureteral stricture, not elsewhere classified
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with ureteral stricture with infection (N13.6)
      - with infection N13.6
Narrowing - see also Stenosis
- ureter N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Obliteration
- ureter N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6
Obstruction, obstructed, obstructive
- ureter (functional) (pelvic junction) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with
    - hydronephrosis N13.1
      ICD-10-CM Diagnosis Code N13.1
      Hydronephrosis with ureteral stricture, not elsewhere classified
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with ureteral stricture with infection (N13.6)
      - with infection N13.6
Ormond's disease (with ureteral obstruction) N13.5
ICD-10-CM Diagnosis Code N13.5
Crossing vessel and stricture of ureter without hydronephrosis
Applicable To
Kinking and stricture of ureter without hydronephrosis
Type 1 Excludes
Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
- with infection N13.6
Prolapse, prolapsed
- ureter N28.89
  ICD-10-CM Diagnosis Code N28.89
  Other specified disorders of kidney and ureter
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  - with obstruction N13.5
    ICD-10-CM Diagnosis Code N13.5
    Crossing vessel and stricture of ureter without hydronephrosis
    2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    Kinking and stricture of ureter without hydronephrosis
    Type 1 Excludes
    Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
    - with infection N13.6
Pyelitis (congenital) (uremic) - see also Pyelonephritis
- with
  - calculus
    - with hydronephrosis N13.6
- chronic N11.9
  ICD-10-CM Diagnosis Code N11.9
  Chronic tubulo-interstitial nephritis, unspecified
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Chronic interstitial nephritis NOS
  Chronic pyelitis NOS
  Chronic pyelonephritis NOS
  - with calculus
    - with hydronephrosis N13.6
Pyelonephritis - see also Nephritis, tubulo-interstitial
- with
  - calculus
    - with hydronephrosis N13.6
- calculous
  - with hydronephrosis N13.6
- chronic N11.9
  ICD-10-CM Diagnosis Code N11.9
  Chronic tubulo-interstitial nephritis, unspecified
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Chronic interstitial nephritis NOS
  Chronic pyelitis NOS
  Chronic pyelonephritis NOS
  - with calculus
    - with hydronephrosis N13.6
Pyohydronephrosis N13.6
Pyonephrosis N13.6
Stricture - see also Stenosis
- ureter (postoperative) N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with
    - hydronephrosis N13.1
      ICD-10-CM Diagnosis Code N13.1
      Hydronephrosis with ureteral stricture, not elsewhere classified
      2016 2017 2018 2019 2020 2021 Billable/Specific Code
      Type 1 Excludes
      Hydronephrosis with ureteral stricture with infection (N13.6)
      - with infection N13.6
- ureterovesical orifice N13.5
  ICD-10-CM Diagnosis Code N13.5
  Crossing vessel and stricture of ureter without hydronephrosis
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Kinking and stricture of ureter without hydronephrosis
  Type 1 Excludes
  Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
  - with infection N13.6

ICD-10-CM Codes Adjacent To N13.6

N12 Tubulo-interstitial nephritis, not specified as acute or chronic

N13 Obstructive and reflux uropathy

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

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 …… unspecified

N13.71 …… without reflux nephropathy

N13.72 Vesicoureteral-reflux with reflux nephropathy without hydroureter

N13.721 …… unilateral

N13.722 …… bilateral

N13.729 …… unspecified

N13.73 Vesicoureteral-reflux with reflux nephropathy with hydroureter

N13.731 …… unilateral

N13.732 …… bilateral

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code N13.6

Pyonephrosis

Hydronephrosis with ureteropelvic junction obstruction

Crossing vessel and stricture of ureter without hydronephrosis

Bacterial and viral infectious agents

Diseases of the genitourinary system

Renal tubulo-interstitial diseases

Obstructive and reflux uropathy

Hydronephrosis with ureteral stricture, not elsewhere classified

Hydronephrosis with renal and ureteral calculous obstruction

Other and unspecified hydronephrosis

Hydroureter

Crossing vessel and stricture of ureter without hydronephrosis

Other fibroblastic disorders

Cutaneous abscess, unspecified

Renal and perinephric abscess

Calculus of kidney

Crossing vessel and stricture of ureter without hydronephrosis

Calculus of kidney

Calculus of ureter

Calculus of kidney with calculus of ureter

Hydronephrosis with renal and ureteral calculous obstruction

Urinary calculus, unspecified

Hydronephrosis with renal and ureteral calculous obstruction

Crossing vessel and stricture of ureter without hydronephrosis

Crossing vessel and stricture of ureter without hydronephrosis

Fibroblastic disorder, unspecified

Crossing vessel and stricture of ureter without hydronephrosis

Crossing vessel and stricture of ureter without hydronephrosis

Unspecified hydronephrosis

Hydronephrosis with renal and ureteral calculous obstruction

Hydronephrosis with ureteral stricture, not elsewhere classified

Hydronephrosis with renal and ureteral calculous obstruction

Congenital occlusion of ureteropelvic junction

Hydronephrosis with ureteropelvic junction obstruction

Hydronephrosis with ureteral stricture, not elsewhere classified

Hydroureter

Unspecified infectious disease

Renal tubulo-interstitial disease, unspecified

Calculus of kidney

Crossing vessel and stricture of ureter without hydronephrosis

Hydronephrosis with ureteral stricture, not elsewhere classified

Crossing vessel and stricture of ureter without hydronephrosis

Crossing vessel and stricture of ureter without hydronephrosis

Crossing vessel and stricture of ureter without hydronephrosis

Hydronephrosis with ureteral stricture, not elsewhere classified

Crossing vessel and stricture of ureter without hydronephrosis

Other specified disorders of kidney and ureter

Crossing vessel and stricture of ureter without hydronephrosis

Chronic tubulo-interstitial nephritis, unspecified

Chronic tubulo-interstitial nephritis, unspecified

Crossing vessel and stricture of ureter without hydronephrosis

Hydronephrosis with ureteral stricture, not elsewhere classified

Crossing vessel and stricture of ureter without hydronephrosis