2026 ICD-10-CM Diagnosis Code N29Other disorders of kidney and ureter in diseases classified elsewhere
ICD-10-CM Codes›N00–N99›N25-N29›N29
- Billable — Valid for Submission
- Not Chronic
N29 is a billable ICD-10-CM diagnosis code for other disorders of kidney and ureter in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. The code is a manifestation code that cannot be reported as the principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of kidney and ureters.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for N29.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cortical nephrocalcinosis
- Disorder of kidney and/or ureter caused by Schistosoma haematobium
- Disorder of kidney due to lambda light chain disease
- Enamel-renal syndrome
- Familial hypomagnesemia hypercalciuria nephrocalcinosis with severe ocular involvement
- Familial hypomagnesemia-hypercalciuria
- Familial primary hypomagnesemia with hypercalciuria and nephrocalcinosis
- Familial primary hypomagnesemia with hypercalciuria and nephrocalcinosis without severe ocular involvement
- Genitourinary tract schistosomiasis
- Macroscopic nephrocalcinosis
- Medullary nephrocalcinosis
- Metabolic renal disease
- Microscopic nephrocalcinosis
- Myeloma kidney
- Neonatal nephrocalcinosis
- Neonatal renal disorder
- Nephrocalcinosis
- Renal disorder due to systemic lupus erythematosus
- Renal disorders in systemic disease
- Renal involvement in malignant disease
- Renal involvement in scleroderma
- Schistosoma haematobium infection
- Urethral stricture due to infection
- Urethral stricture due to schistosomiasis
- Urinary schistosomiasis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
Type 1 Excludes
- disorders of kidney and ureter in:
- cystinosis E72.0
- gonorrhea A54.21
- syphilis A52.75
- tuberculosis A18.11
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.
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- tuberculous - N29
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Calcification
- kidney
- tuberculous
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.Nephrocalcinosis
deposition of calcium in the renal parenchyma, resulting from high levels of calcium in the blood and/or urine.
Patient EducationClinical
Kidney Diseases
You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N29 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N29Overview
Is N29 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other disorders of kidney and ureter in diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N29 group to?
On inpatient claims, other disorders of kidney and ureter in diseases classified elsewhere maps to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N29 be a principal diagnosis?
No. This is a manifestation code: other disorders of kidney and ureter in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of N29?
Under the General Equivalence Mappings, other disorders of kidney and ureter in diseases classified elsewhere converts to ICD-9-CM 593.9 (renal & ureteral dis NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
