2017/18 ICD-10-CM Diagnosis Code N12

Tubulo-interstitial nephritis, not specified as acute or chronic

Applicable To
  • Interstitial nephritis NOS
  • Pyelitis NOS
  • Pyelonephritis NOS
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as N12. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • calculous pyelonephritis (
    ICD-10-CM Diagnosis Code N20.9

    Urinary calculus, unspecified

      2016 2017 2018 Billable/Specific Code
    N20.9
    )
The following code(s) above N12 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 N12:
  • N00-N99
    2018 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
    2018 ICD-10-CM Range N10-N16

    Renal tubulo-interstitial diseases

    Includes
    • pyelonephritis
    Type 1 Excludes
    • pyeloureteritis cystica (N28.85)
    Renal tubulo-interstitial diseases
Approximate Synonyms Clinical Information ICD-10-CM N12 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert N12 to ICD-9-CM

Code History
Code annotations containing back-references to N12:

Diagnosis Index entries containing back-references to N12:

ICD-10-CM Codes Adjacent To N12
N07.7 Hereditary nephropathy, not elsewhere classified with diffuse crescentic glomerulonephritis
N07.8 Hereditary nephropathy, not elsewhere classified with other morphologic lesions
N07.9 Hereditary nephropathy, not elsewhere classified with unspecified morphologic lesions
N08 Glomerular disorders in diseases classified elsewhere
N10 Acute pyelonephritis
N11 Chronic tubulo-interstitial nephritis
N11.0 Nonobstructive reflux-associated chronic pyelonephritis
N11.1 Chronic obstructive pyelonephritis
N11.8 Other chronic tubulo-interstitial nephritis
N11.9 Chronic tubulo-interstitial nephritis, unspecified
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

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