ICD-10-CM 2027
ICD-10 code for kidney atrophy
From the official ICD-10-CM alphabetic index entry “Atrophy, atrophic (of) › kidney (senile) (terminal)”. Page updated September 29, 2026.
About coding kidney atrophy
The ICD-10-CM code for kidney atrophy is N26.1 (Atrophy of kidney (terminal)). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on N26.1.
Within N26 (unspecified contracted kidney), N26.1 is specifically for atrophy of kidney (terminal). Related codes cover Page kidney (N26.2) and renal sclerosis, unspecified (N26.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific kidney atrophy codes (official index)
Common questions about kidney atrophy ICD-10 codes
What is the ICD-10 code for kidney atrophy?
- N26.1 — Atrophy of kidney (terminal). More specific codes apply when the documentation supports them: Q60.5, Q60.4, Q60.3.
What is the ICD-10 code for congenital or infantile kidney atrophy?
- Q60.5 — Renal hypoplasia, unspecified.
Is N26.1 billable?
- Yes. N26.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N26.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N26.1 as a principal diagnosis.
Is N26.1 a CC or MCC?
- No. N26.1 is neither a CC nor an MCC under MS-DRG v44.0.