N25.89
Other disorders resulting from impaired renal tubular function
N25.89 (also written N2589) is a billable ICD-10-CM diagnosis code for other disorders resulting from impaired renal tubular function. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 5 codes in category N25 (Disorders resulting from impaired renal tubular function). The Alphabetic Index lists it under 19 entries. Its coding notes include 9 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (9 notes)
- disorders of kidney and ureter with urolithiasis (N20-N23)
- 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)
Care settings
How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.
Home Health Primary
Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Gastrointestinal tract and Genitourinary system clinical group.
Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026Inclusion terms
Conditions classified to this code.
- Hypokalemic nephropathy
- Lightwood-Albright syndrome
- Renal tubular acidosis NOS
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 19 entries
- Acidosis (lactic), kidney, tubular
- Acidosis (lactic), renal (hyperchloremic) (tubular)
- Depletion, potassium, nephropathy
- Disease, diseased, Lightwood's (renal tubular acidosis)
- Disorder (of), impaired renal tubular function, specified NEC
- Disorder (of), kidney, tubular function, specified NEC
- Disorder (of), tubulo-renal function, impaired, specified NEC
- Impaired, impairment (function), kidney, disorder resulting from, specified NEC
- Impaired, impairment (function), renal (acute) (chronic), disorder resulting from, specified NEC
- Lightwood's disease or syndrome (renal tubular acidosis)
- Lightwood-Albright syndrome
- Nephropathy, hypercalcemic