Valid for Submission
C66.9 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of unspecified ureter. The code C66.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code C66.9 might also be used to specify conditions or terms like 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, etc.
Unspecified diagnosis codes like C66.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
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
Diagnostic Related Groups - MS-DRG Mapping
Convert C66.9 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code C66.9 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
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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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
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