2026 ICD-10-CM Diagnosis Code Q63.8Other specified congenital malformations of kidney

ICD-10-CM Codes›Q00-Q99›Q60-Q64›Q63

ICD-10-CM Q63.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q63.8 is a billable ICD-10-CM diagnosis code for other specified congenital malformations of kidney. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary congenital anomalies.

Code Identity

ICD-10-CM Code
Q63.8
Billable Status
Yes — Valid for Submission
Code Describes
Other specified congenital malformations of kidney
Short Description
Other specified congenital malformations of kidney
Same as the full description in the CMS dataset.
Parent Code
Q63
Other congenital malformations of kidney

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ60-Q64Congenital malformations of the urinary system
CategoryQ63Other congenital malformations of kidney
This CodeQ63.8Other specified congenital malformations of kidney

Present on Admission (POA)Billing

Q63.8 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accessory kidney
  • Acrorenal field defect, ectodermal dysplasia, and lipoatrophic diabetes
  • Bilateral congenital primary hydronephrosis
  • Bilateral hydronephrosis
  • Congenital abnormal shape of kidney
  • Congenital asymmetry of kidneys
  • Congenital calculus of kidney
  • Congenital calyceal diverticulum
  • Congenital dilatation of renal pelvis
  • Congenital hydrocalicosis
  • Congenital hydronephrosis
  • Congenital megacalycosis
  • Congenital megacalycosis of bilateral kidneys
  • Congenital membranous nephropathy due to maternal anti-neutral endopeptidase alloimmunization
  • Diffuse hyperplastic perilobular nephroblastomatosis
  • Dilatation of calyx
  • Dilatation of renal pelvis
  • Diverticulum of renal calyx
  • Inequality in size of kidneys
  • Infundibulopelvic stenosis multicystic kidney syndrome
  • Megacalycosis
  • Nodular renal blastema
  • PELVIS syndrome
  • Prominent renal pelvis
  • Renal caliceal diverticuli and deafness syndrome
  • Trifid kidney
  • Trifid pelvis of kidney
  • Triple kidney with triple pelvis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Congenital renal calculi

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anomaly, anomalous(congenital) (unspecified type)
      • kidney (s) (calyx) (pelvis)
        • specified NEC
    • Anomaly, anomalous(congenital) (unspecified type)
      • renal
        • pelvis
          • specified NEC
    • Bifid(congenital)
      • kidney
    • Bifurcation(congenital)
      • kidney pelvis
    • Bifurcation(congenital)
      • renal pelvis
    • Calculus, calculi, calculous
      • kidney (impacted) (multiple) (pelvis) (recurrent) (staghorn)
        • congenital
    • Contraction(s), contracture, contracted
      • kidney (granular) (secondary)
        • congenital
    • Defect, defective
      • renal pelvis
    • Floating
      • kidney
        • congenital
    • L-shaped kidney
    • Malformation(congenital)
      • kidney
        • specified type NEC
    • Movable
      • kidney
        • congenital
    • Ramifying renal pelvis
    • Ren
      • mobile, mobilis
        • congenital
    • Trifid
      • kidney (pelvis)
    • Wandering
      • kidney, congenital

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR MAL003
Genitourinary congenital anomalies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Congenital Hydronephrosis

    collection of urine in the renal pelvis that results in dilatation of the renal pelvis and calyces that is present at birth.

  • Megacalycosis

    isolated enlargement of renal calyces without obstruction.

Patient EducationClinical

Kidney Diseases

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Q63.8 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
753.3 Kidney anomaly NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Q63.8Overview

Is Q63.8 (Other congenital malformations of kidney) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified congenital malformations of kidney on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Q63.8 group to?

When other specified congenital malformations of kidney is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q63.8 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other specified congenital malformations of kidney on inpatient claims.

What is the ICD-9 equivalent of Q63.8?

Under the General Equivalence Mappings, other specified congenital malformations of kidney converts to ICD-9-CM 753.3 (kidney anomaly NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.