ICD-10-CM Code N13.9

Obstructive and reflux uropathy, unspecified

Version 2020 Billable Code

Valid for Submission

N13.9 is a billable code used to specify a medical diagnosis of obstructive and reflux uropathy, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code N13.9 might also be used to specify conditions or terms like acquired obstruction of urinary tract, acute renal failure due to obstruction, azotemia, complete obstruction of the urinary tract, congenital cleft hand, fetal lower urinary tract obstruction, etc

Short Description:Obstructive and reflux uropathy, unspecified
Long Description:Obstructive and reflux uropathy, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code N13.9:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Urinary tract obstruction NOS

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 N13.9 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 obstruction of urinary tract
  • Acute renal failure due to obstruction
  • Azotemia
  • Complete obstruction of the urinary tract
  • Congenital cleft hand
  • Fetal lower urinary tract obstruction
  • Fetal lower urinary tract obstruction
  • Fetal lower urinary tract obstruction due to anterior urethral valve
  • Fetal lower urinary tract obstruction due to posterior urethral valve
  • Lower urinary tract obstructive syndrome
  • Nephropathy due to acquired urinary tract obstruction
  • Partial obstruction of the urinary tract
  • Postrenal azotemia
  • Post-renal renal failure
  • Reflux of urine
  • Split hand, obstructive uropathy, spina bifida, diaphragmatic defect syndrome
  • Upper urinary tract dilatation and obstruction
  • Urinary outflow obstruction
  • Urinary tract obstruction

Diagnostic Related Groups

The ICD-10 code N13.9 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 N13.9 to ICD-9

  • 592.9 - Urinary calculus NOS (Approximate Flag)
  • 593.73 - Vscourtl rflx w npht NOS (Approximate Flag)
  • 599.60 - Urinary obstruction NOS (Approximate Flag)
  • 599.69 - Urinary obstruction NEC (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

Bladder Diseases

The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are

  • Cystitis - inflammation of the bladder, often from an infection
  • Urinary incontinence - loss of bladder control
  • Overactive bladder - a condition in which the bladder squeezes urine out at the wrong time
  • Interstitial cystitis - a chronic problem that causes bladder pain and frequent, urgent urination
  • Bladder cancer

Doctors diagnose bladder diseases using different tests. These include urine tests, x-rays, and an examination of the bladder wall with a scope called a cystoscope. Treatment depends on the cause of the problem. It may include medicines and, in severe cases, surgery.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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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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