ICD-10-CM Code N13.39

Other hydronephrosis

Version 2020 Billable Code

Valid for Submission

N13.39 is a billable code used to specify a medical diagnosis of other hydronephrosis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code N13.39 might also be used to specify conditions or terms like acquired hydronephrosis, acquired hydronephrosis due to bladder obstruction, acquired obstruction of urinary tract, hydronephrosis due to bladder obstruction, hydroureter, hydroureteronephrosis, etc

Short Description:Other hydronephrosis
Long Description:Other hydronephrosis

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code N13.39 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acquired hydronephrosis
  • Acquired hydronephrosis due to bladder obstruction
  • Acquired obstruction of urinary tract
  • Hydronephrosis due to bladder obstruction
  • Hydroureter
  • Hydroureteronephrosis
  • Pyelectasia

Clinical Information

  • HYDRONEPHROSIS-. abnormal enlargement or swelling of a kidney due to dilation of the kidney calices and the kidney pelvis. it is often associated with obstruction of the ureter or chronic kidney diseases that prevents normal drainage of urine into the urinary bladder.
  • PYONEPHROSIS-. distention of kidney with the presence of pus and suppurative destruction of the renal parenchyma. it is often associated with renal obstruction and can lead to total or nearly total loss of renal function.

Diagnostic Related Groups

The ICD-10 code N13.39 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert N13.39 to ICD-9

  • 591 - Hydronephrosis (Approximate Flag)

Code Classification

  • Diseases of the genitourinary system (N00–N99)
    • Renal tubulo-interstitial diseases (N10-N16)
      • Obstructive and reflux uropathy (N13)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients

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. It goes to your bladder, which stores the urine until you go to the bathroom.

Most kidney diseases attack the nephrons. This damage may leave kidneys unable to remove wastes. Causes can include genetic problems, injuries, or medicines. You have a higher risk of kidney disease if you have diabetes, high blood pressure, or a close family member with kidney disease. Chronic kidney disease damages the nephrons slowly over several years. Other kidney problems include

  • Cancer
  • Cysts
  • Stones
  • Infections

Your doctor can do blood and urine tests to check if you have kidney disease. If your kidneys fail, you will need dialysis or a kidney transplant.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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