ICD-9 Code 236.91

Neoplasm of uncertain behavior of kidney and ureter

Not Valid for Submission

236.91 is a legacy non-billable code used to specify a medical diagnosis of neoplasm of uncertain behavior of kidney and ureter. This code was replaced on September 30, 2015 by its ICD-10 equivalent.

ICD-9: 236.91
Short Description:Unc behav neo kidney
Long Description:Neoplasm of uncertain behavior of kidney and ureter

Convert 236.91 to ICD-10

The following crosswalk between ICD-9 to ICD-10 is based based on the General Equivalence Mappings (GEMS) information:

  • D41.00 - Neoplasm of uncertain behavior of unspecified kidney
  • D41.20 - Neoplasm of uncertain behavior of unspecified ureter

Code Classification

  • Neoplasms (140–239)
    • Neoplasms of uncertain behavior (235-238)
      • 236 Neoplasm of uncertain behavior of genitourinary organs

Information for Medical Professionals

Index to Diseases and Injuries

References found for the code 236.91 in the Index of Diseases and Injuries:


Information for Patients


Kidney Diseases

Also called: Renal disease

Your kidneys are two bean-shaped organs, each about the size of your fists. They are located near the middle of your back, just below the rib cage. Inside each kidney about a million tiny structures called nephrons filter blood. They remove waste products and extra water, which become urine. The urine flows through tubes called ureters 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 are at greater risk for 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 run tests to find out if you have kidney disease. If your kidneys fail completely, a kidney transplant or dialysis can replace the work your kidneys normally do.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • 24-hour urine protein
  • Abdominal MRI
  • Abdominal tap
  • ACE inhibitors
  • Acid loading test (pH)
  • Acute nephritic syndrome
  • Albumin - serum
  • Analgesic nephropathy
  • Atheroembolic renal disease
  • Bartter syndrome
  • Basic metabolic panel
  • Bilateral hydronephrosis
  • BUN
  • Congenital nephrotic syndrome
  • Creatinine - urine
  • Distal renal tubular acidosis
  • Focal segmental glomerulosclerosis
  • Glomerular filtration rate
  • Glomerulonephritis
  • Goodpasture syndrome
  • IgA nephropathy
  • Injury - kidney and ureter
  • Interstitial nephritis
  • Kidney biopsy
  • Kidney removal
  • Kidney removal - discharge
  • Medicines and Kidney Disease - NIH (National Kidney Disease Education Program)
  • Membranoproliferative GN I
  • Membranous nephropathy
  • Microalbuminuria test
  • Minimal change disease
  • Nephrocalcinosis
  • Nephrotic syndrome
  • Obstructive uropathy
  • Perirenal abscess
  • Protein urine test
  • Proximal renal tubular acidosis
  • Reflux nephropathy
  • Renal arteriography
  • Renal papillary necrosis
  • Renal perfusion scintiscan
  • Renal scan
  • Renal vein thrombosis
  • Renal venogram
  • Total protein
  • Unilateral hydronephrosis
  • Urinary casts

[Read More]

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

[Read More]

ICD-9 Footnotes

General Equivalence Map Definitions
The ICD-9 and ICD-10 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.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

  • And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
  • Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
  • Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • Type 1 Excludes Notes - A type 1 Excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
  • Inclusion terms - List of terms is included under some codes. 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.
  • NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
  • NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
  • See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
  • See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
  • 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
  • With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.