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

      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)
    N13.0-
    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)
    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

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • hydronephrosis with infection (N13.6)
    ICD-10-CM Diagnosis Code N13.4

    Hydroureter

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      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)
    ICD-10-CM Diagnosis Code M72.8

    Other fibroblastic disorders

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • 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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • 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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    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

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • 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

      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
  • 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
    • 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
  • Pyelonephritis - see also Nephritis, tubulo-interstitial
    • with
    • 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
  • 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.