ICD-10-CM 2027
ICD-10 code for renal anomaly
From the official ICD-10-CM alphabetic index entry “Anomaly, anomalous (congenital) (unspecified type) › renal”. Page updated September 29, 2026.
About coding renal anomaly
The ICD-10-CM code for renal anomaly is Q63.9 (Congenital malformation of kidney, unspecified). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Q63.9.
Within Q63, choose Q63.9 (Congenital malformation of kidney, unspecified) only when documentation doesn't support a more specific option: accessory kidney (Q63.0), Lobulated, fused and horseshoe kidney (Q63.1), ectopic kidney (Q63.2), hyperplastic and giant kidney (Q63.3) and other specified congenital malformations of kidney (Q63.8).
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 renal anomaly codes (official index)
Common questions about renal anomaly ICD-10 codes
What is the ICD-10 code for renal anomaly?
- Q63.9 — Congenital malformation of kidney, unspecified. More specific codes apply when the documentation supports them: Q27.2, Q63.9, Q63.8.
What is the ICD-10 code for artery renal anomaly?
- Q27.2 — Other congenital malformations of renal artery.
What is the ICD-10 code for pelvis renal anomaly?
- Q63.9 — Congenital malformation of kidney, unspecified.
Is Q63.9 billable?
- Yes. Q63.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q63.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q63.9 as a principal diagnosis.
Is Q63.9 a CC or MCC?
- No. Q63.9 is neither a CC nor an MCC under MS-DRG v44.0.