Chapter 17

Q00–Q99: Congenital Malformations, Deformations and Chromosomal Abnormalities

Congenital Malformations, Deformations and Chromosomal Abnormalities diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)

inborn errors of metabolism (E70-E88)

All Codes Billable Only

Internal Codes

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Q61.3|
Polycystic kidney, unspecified
Q61.4|
Renal dysplasia
Q61.5|
Medullary cystic kidney
Q61.8|
Other cystic kidney diseases
Q61.9|
Cystic kidney disease, unspecified
Q62|
Congenital obstructive defects of renal pelvis and congenital malformations of ureter
Q62.0|
Congenital hydronephrosis
Q62.1|
Congenital occlusion of ureter
Q62.10|
Congenital occlusion of ureter, unspecified
Q62.11|
Congenital occlusion of ureteropelvic junction
Q62.12|
Congenital occlusion of ureterovesical orifice
Q62.2|
Congenital megaureter
Q62.3|
Other obstructive defects of renal pelvis and ureter
Q62.31|
Congenital ureterocele, orthotopic
Q62.32|
Cecoureterocele
Q62.39|
Other obstructive defects of renal pelvis and ureter
Q62.4|
Agenesis of ureter
Q62.5|
Duplication of ureter
Q62.6|
Malposition of ureter
Q62.60|
Malposition of ureter, unspecified
Q62.61|
Deviation of ureter
Q62.62|
Displacement of ureter
Q62.63|
Anomalous implantation of ureter
Q62.69|
Other malposition of ureter
Q62.7|
Congenital vesico-uretero-renal reflux
Q62.8|
Other congenital malformations of ureter
Q63|
Other congenital malformations of kidney
Q63.0|
Accessory kidney
Q63.1|
Lobulated, fused and horseshoe kidney
Q63.2|
Ectopic kidney
Q63.3|
Hyperplastic and giant kidney
Q63.8|
Other specified congenital malformations of kidney
Q63.9|
Congenital malformation of kidney, unspecified
Q64|
Other congenital malformations of urinary system
Q64.0|
Epispadias
Q64.1|
Exstrophy of urinary bladder
Q64.10|
Exstrophy of urinary bladder, unspecified
Q64.11|
Supravesical fissure of urinary bladder
Q64.12|
Cloacal exstrophy of urinary bladder
Q64.19|
Other exstrophy of urinary bladder
Q64.2|
Congenital posterior urethral valves
Q64.3|
Other atresia and stenosis of urethra and bladder neck
Q64.31|
Congenital bladder neck obstruction
Q64.32|
Congenital stricture of urethra
Q64.33|
Congenital stricture of urinary meatus
Q64.39|
Other atresia and stenosis of urethra and bladder neck
Q64.4|
Malformation of urachus
Q64.5|
Congenital absence of bladder and urethra
Q64.6|
Congenital diverticulum of bladder
Q64.7|
Other and unspecified congenital malformations of bladder and urethra

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