Unspecified kidney failure (N19) ICD-10-CM
The N19 code range covers unspecified kidney failure with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Uremia NOS
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.
Codes in the N19 Range 1 codes · 1 billable
- N19 Unspecified kidney failure
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the N19 range.
Calciphylaxis
Condition of induced systemic hypersensitivity in which tissues respond to appropriate challenging agents with a sudden local calcification.
Hyperphosphatemia
A condition of abnormally high level of PHOSPHATES in the blood, usually significantly above the normal range of 0.84-1.58 mmol per liter of serum.
Hyperuricemia
Excessive URIC ACID or urate in blood as defined by its solubility in plasma at 37 degrees C; greater than 0.42mmol per liter (7.0mg/dL) in men or 0.36mmol per liter (6.0mg/dL) in women. This condition is caused by overproduction of uric acid or impaired renal clearance. Hyperuricemia can be acquired, drug-induced or genetically determined (LESCH-NYHAN SYNDROME). It is associated with HYPERTENSION and GOUT.
Hypoxanthine Phosphoribosyltransferase
An enzyme that catalyzes the conversion of 5-phosphoribosyl-1-pyrophosphate and hypoxanthine, guanine, or MERCAPTOPURINE to the corresponding 5'-mononucleotides and pyrophosphate. The enzyme is important in purine biosynthesis as well as central nervous system functions. Complete lack of enzyme activity is associated with the LESCH-NYHAN SYNDROME, while partial deficiency results in overproduction of uric acid. EC 2.4.2.8.
Lesch-Nyhan Syndrome
An inherited disorder transmitted as a sex-linked trait and caused by a deficiency of an enzyme of purine metabolism; HYPOXANTHINE PHOSPHORIBOSYLTRANSFERASE. Affected individuals are normal in the first year of life and then develop psychomotor retardation, extrapyramidal movement disorders, progressive spasticity, and seizures. Self-destructive behaviors such as biting of fingers and lips are seen frequently. Intellectual impairment may also occur but is typically not severe. Elevation of uric acid in the serum leads to the development of renal calculi and gouty arthritis. (Menkes, Textbook of Child Neurology, 5th ed, pp127)
Phosphates
Inorganic salts of phosphoric acid.
Restless Legs Syndrome
A disorder characterized by aching or burning sensations in the lower and rarely the upper extremities that occur prior to sleep or may awaken the patient from sleep.
Uremia
A clinical syndrome associated with the retention of renal waste products or uremic toxins in the blood. It is usually the result of RENAL INSUFFICIENCY. Most uremic toxins are end products of protein or nitrogen CATABOLISM, such as UREA or CREATININE. Severe uremia can lead to multiple organ dysfunctions with a constellation of symptoms.
Uremic Toxins
Biological solutes retained and accumulated due to kidney impairment that contribute to uremia/chronic kidney disease.
About the N19 Code Range
The ICD-10 code N19 is used to classify cases of unspecified kidney failure, encompassing a range of kidney dysfunctions where detailed cause or type is not specified. This code covers various kidney failure conditions including chronic and acute forms when exact diagnosis details are unavailable.
Unspecified kidney failure (N19) includes conditions commonly known by several synonyms, such as renal failure syndrome, chronic progressive renal failure, and uremia. It also applies to complications like anemia, neuropathy, and platelet function disorders due to kidney failure. Practitioners may encounter terms like dependence on renal dialysis, benign hypertensive renal disease, and uremic encephalopathy, all of which fall under this code when specific renal failure type is not recorded. Using the ICD-10 code for unspecified kidney failure ensures accurate coding when the nature of kidney impairment is unclear, aiding medical coding professionals in classifying a broad spectrum of renal failure-related conditions without exact specification.
Questions About This Page
How many billable codes are in the N19 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the N19 range classify?
The range classifies unspecified kidney failure. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
