ICD-10-CM 2027
ICD-10 code for renal pelvis defect
From the official ICD-10-CM alphabetic index entry “Defect, defective › renal pelvis”. Page updated September 29, 2026.
About coding renal pelvis defect
The ICD-10-CM code for renal pelvis defect is Q63.8 (Other specified congenital malformations of kidney). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Q63.8.
Within Q63, choose Q63.8 (Other specified congenital malformations of kidney) 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 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.
More specific renal pelvis defect codes (official index)
- obstructive Q62.39 — Other obstructive defects of renal pelvis and ureter
Common questions about renal pelvis defect ICD-10 codes
What is the ICD-10 code for renal pelvis defect?
- Q63.8 — Other specified congenital malformations of kidney. More specific codes apply when the documentation supports them: Q62.39.
What is the ICD-10 code for obstructive renal pelvis defect?
- Q62.39 — Other obstructive defects of renal pelvis and ureter.
Is Q63.8 billable?
- Yes. Q63.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q63.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q63.8 as a principal diagnosis.
Is Q63.8 a CC or MCC?
- No. Q63.8 is neither a CC nor an MCC under MS-DRG v44.0.