ICD-10 Code C66.9

Malignant neoplasm of unspecified ureter

Version 2019 Billable Code

Valid for Submission

C66.9 is a billable code used to specify a medical diagnosis of malignant neoplasm of unspecified ureter. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

ICD-10: C66.9
Short Description:Malignant neoplasm of unspecified ureter
Long Description:Malignant neoplasm of unspecified ureter

Code Classification

  • Neoplasms (C00–D48)
    • Malignant neoplasms of urinary tract (C64-C68)
      • Malignant neoplasm of ureter (C66)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated 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

Information for Medical Professionals

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). The diagnosis code C66.9 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 656 - KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITH MCC
  • 657 - KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITH CC
  • 658 - KIDNEY AND URETER PROCEDURES FOR NEOPLASM WITHOUT CC/MCC
  • 659 - KIDNEY AND URETER PROCEDURES FOR NON-NEOPLASM WITH MCC
  • 660 - KIDNEY AND URETER PROCEDURES FOR NON-NEOPLASM WITH CC
  • 661 - KIDNEY AND URETER PROCEDURES FOR NON-NEOPLASM WITHOUT CC/MCC

Convert C66.9 to ICD-9

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

  • 189.2 - Malign neopl ureter (Approximate Flag)

Synonyms

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

  • Carcinoma of ureter
  • Malignant tumor of ureter
  • pN1: Metastasis in a single lymph node, 2 cm or less in greatest dimension
  • pN2: Metastasis in a single lymph node, more than 2 cm but not more than 5 cm in greatest dimension; or multiple lymph nodes, none more than 5 cm in greatest dimension
  • pN3: Metastasis in a lymph node, more than 5 cm in greatest dimension
  • Primary malignant neoplasm of ureter
  • pT1: Tumor invades subepithelial connective tissue
  • pT2: Tumor invades muscularis
  • pT2: Tumor invades muscularis propria
  • pT3: Tumor invades beyond muscularis into periureteric fat
  • pT4: Tumor invades adjacent organs, or through the kidney into the perinephric fat
  • pTa: Non-invasive papillary carcinoma
  • T2: Renal pelvis/ureter tumor invades the muscularis
  • T3: Ureteral tumor invades beyond muscularis into periureteric fat
  • T4: Renal pelvis/ureter tumor invades adjacent organs, or through the kidney into the perinephric fat
  • Transitional cell carcinoma of ureter

Information for Patients


Cancer

Also called: Carcinoma, Malignancy, Neoplasms, Tumor

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

NIH: National Cancer Institute

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[Learn 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 (Medical Encyclopedia)
  • Retroperitoneal fibrosis (Medical Encyclopedia)
  • Ureteral reimplantation surgery - children (Medical Encyclopedia)
  • Ureteral retrograde brush biopsy (Medical Encyclopedia)
  • Ureterocele (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
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.

  • 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.