ICD-10 Diagnosis Code N21.8

Other lower urinary tract calculus

Diagnosis Code N21.8

ICD-10: N21.8
Short Description: Other lower urinary tract calculus
Long Description: Other lower urinary tract calculus
This is the 2017 version of the ICD-10-CM diagnosis code N21.8

Valid for Submission
The code N21.8 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the genitourinary system (N00–N99)
    • Urolithiasis (N20-N23)
      • Calculus of lower urinary tract (N21)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code N21.8 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)

  • URINARY STONES WITH ESW LITHOTRIPSY WITH CC/MCC 691
  • URINARY STONES WITH ESW LITHOTRIPSY WITHOUT CC/MCC 692
  • URINARY STONES WITHOUT ESW LITHOTRIPSY WITH MCC 693
  • URINARY STONES WITHOUT ESW LITHOTRIPSY WITHOUT MCC 694

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 594.8 - Lower urin calcul NEC

Synonyms
  • Ureteric stone
  • Urinary bladder stone
  • Vesicoureteric junction calculus

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

  • Bladder biopsy
  • Bladder outlet obstruction
  • Bladder stones
  • Cystitis - noninfectious
  • Indwelling catheter care
  • Neurogenic bladder
  • Self catheterization - female
  • Self catheterization - male
  • Urinary catheters
  • Urinary Retention - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)


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Ureteral Disorders

Your kidneys make urine by filtering wastes and extra water from your blood. The urine travels from the kidneys to the bladder in two thin tubes called ureters.

The ureters are about 8 to 10 inches long. Muscles in the ureter walls tighten and relax to force urine down and away from the kidneys. Small amounts of urine flow from the ureters into the bladder about every 10 to 15 seconds.

Sometimes the ureters can become blocked or injured. This can block the flow of urine to the bladder. If urine stands still or backs up the ureter, you may get a urinary tract infections.

Doctors diagnose problems with the ureters using different tests. These include urine tests, x-rays, and examination of the ureter 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

  • Injury - kidney and ureter
  • Retroperitoneal fibrosis
  • Ureteral retrograde brush biopsy
  • Ureterocele


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