2026 ICD-10-CM Diagnosis Code Q62.0Congenital hydronephrosis

ICD-10-CM Codes›Q00-Q99›Q60-Q64›Q62

ICD-10-CM Q62.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q62.0 is a billable ICD-10-CM diagnosis code for congenital hydronephrosis. 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
Q62.0
Billable Status
Yes — Valid for Submission
Code Describes
Congenital hydronephrosis
Short Description
Congenital hydronephrosis
Same as the full description in the CMS dataset.
Parent Code
Q62
Congenital obstructive defects of renal pelvis and congenital malformations of ureter

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ60-Q64Congenital malformations of the urinary system
CategoryQ62Congenital obstructive defects of renal pelvis and congenital malformations of ureter
This CodeQ62.0Congenital hydronephrosis

Present on Admission (POA)Billing

Q62.0 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.

  • Bilateral congenital primary hydronephrosis
  • Bilateral hydronephrosis
  • Congenital hydronephrosis
  • Congenital hydronephrosis due to ureteral obstruction
  • Congenital hydronephrosis due to ureteral orifice obstruction
  • Congenital hydronephrosis due to urinary bladder obstruction
  • Congenital megacalycosis
  • Congenital obstruction of ureter
  • Congenital obstruction of ureteral orifice
  • Congenital secondary hydronephrosis
  • Dilatation of calyx
  • Megacalycosis
  • Obstruction of ureteral orifice

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.

    • Hydronephrosis(atrophic) (early) (functionless) (intermittent) (primary) (secondary) NEC
      • congenital
    • Malformation(congenital)
      • kidney
        • hydronephrosis

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 Q62.0 to ICD-9-CMHistory

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

ICD-9-CM
753.29 Obst def ren plv&urt 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 Q62.0Overview

Is Q62.0 a billable code?

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

What MS-DRG does Q62.0 group to?

When congenital hydronephrosis 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 Q62.0 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 congenital hydronephrosis on inpatient claims.

What is the ICD-9 equivalent of Q62.0?

Under the General Equivalence Mappings, congenital hydronephrosis converts to ICD-9-CM 753.29 (obst def ren plv&urt 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.