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  3. N00–N99
  4. N25-N29
  5. Other disorders of kidney and ureter in diseases classified elsewhere (N29)

Other disorders of kidney and ureter in diseases classified elsewhere (N29)

The ICD-10 code N29 is used to classify unusual kidney and ureter problems that occur as part of other diseases rather than primary kidney disorders. These codes cover a range of kidney and urinary tract issues linked to systemic conditions or infections.

N29 includes kidney and ureter disorders caused by diseases like systemic lupus erythematosus, scleroderma, or malignancies. It also covers conditions referred to by synonyms such as metabolic renal disease, enamel-renal syndrome, and nephrocalcinosis (microscopic, macroscopic, cortical, or medullary). Additionally, ICD-10 N29 addresses renal problems linked to infections like genitourinary tract schistosomiasis or urinary schistosomiasis and their complications, including urethral strictures. Familial primary hypomagnesemia with hypercalciuria and nephrocalcinosis; sometimes associated with severe ocular involvement; is another key condition within this category. For healthcare coding professionals and others searching for the ICD-10 code for kidney disorders arising in systemic diseases, N29 helps specify these complex cases where kidney issues are secondary to other illnesses or infections.

Instructional Notations

Code First

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.

  • underlying disease, such as:
  • amyloidosis E85
  • nephrocalcinosis E83.59
  • schistosomiasis B65.0 B65.9

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Nephrocalcinosis

A condition characterized by calcification of the renal tissue itself. It is usually seen in distal RENAL TUBULAR ACIDOSIS with calcium deposition in the DISTAL KIDNEY TUBULES and the surrounding interstitium. Nephrocalcinosis causes RENAL INSUFFICIENCY.