ICD-10-CM 2027
ICD-10 code for kidney accessory
From the official ICD-10-CM alphabetic index entry “Accessory (congenital) › kidney”. Page updated September 29, 2026.
About coding kidney accessory
The ICD-10-CM code for kidney accessory is Q63.0 (Accessory kidney).
Within Q63 (other congenital malformations of kidney), Q63.0 is specifically for accessory kidney. Related codes cover Lobulated, fused and horseshoe kidney (Q63.1), ectopic kidney (Q63.2), hyperplastic and giant kidney (Q63.3), other specified congenital malformations of kidney (Q63.8) and congenital malformation of kidney, unspecified (Q63.9).
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.
Common questions about kidney accessory ICD-10 codes
What is the ICD-10 code for kidney accessory?
- Q63.0 — Accessory kidney.
Is Q63.0 billable?
- Yes. Q63.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q63.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q63.0 as a principal diagnosis.
Is Q63.0 a CC or MCC?
- No. Q63.0 is neither a CC nor an MCC under MS-DRG v44.0.