ICD-10-CM Codes
C00-D49 Neoplasms
C64-C68 Malignant neoplasms of urinary tract
C66- Malignant neoplasm of ureter

2018/2019 ICD-10-CM Diagnosis Code C66.1

Malignant neoplasm of right ureter

2016

2017

2018

2019

Billable/Specific Code

C66.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2018/2019 edition of ICD-10-CM C66.1 became effective on October 1, 2018.
This is the American ICD-10-CM version of C66.1 - other international versions of ICD-10 C66.1 may differ.

The following code(s) above C66.1 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to C66.1:

C00-D49
2019 ICD-10-CM Range C00-D49
Neoplasms
Note
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Neoplasms
C66
ICD-10-CM Diagnosis Code C66
Malignant neoplasm of ureter
Type 1 Excludes
- malignant neoplasm of ureteric orifice of bladder (C67.6)
Malignant neoplasm of ureter

Approximate Synonyms

Cancer, right ureter
Primary malignant neoplasm of bilateral ureters
Primary malignant neoplasm of right ureter
Transitional cell carcinoma of bilateral ureters
Transitional cell carcinoma of right ureter
Transitional cell carcinoma, bilateral ureters
Transitional cell carcinoma, r ureter
Ureteral cancer, bilateral ureters

ICD-10-CM C66.1 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):

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
686 Kidney and urinary tract neoplasms with mcc
687 Kidney and urinary tract neoplasms with cc
688 Kidney and urinary tract neoplasms without cc/mcc

Convert C66.1 to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change

ICD-10-CM Codes Adjacent To C66.1

C63.9 Malignant neoplasm of male genital organ, unspecified

C64 Malignant neoplasm of kidney, except renal pelvis

C64.1 Malignant neoplasm of right kidney, except renal pelvis

C64.2 Malignant neoplasm of left kidney, except renal pelvis

C64.9 Malignant neoplasm of unspecified kidney, except renal pelvis

C65 Malignant neoplasm of renal pelvis

C65.1 Malignant neoplasm of right renal pelvis

C65.2 Malignant neoplasm of left renal pelvis

C65.9 Malignant neoplasm of unspecified renal pelvis

C66 Malignant neoplasm of ureter

C66.1 Malignant neoplasm of right ureter

C66.2 Malignant neoplasm of left ureter

C66.9 Malignant neoplasm of unspecified ureter

C67 Malignant neoplasm of bladder

C67.0 Malignant neoplasm of trigone of bladder

C67.1 Malignant neoplasm of dome of bladder

C67.2 Malignant neoplasm of lateral wall of bladder

C67.3 Malignant neoplasm of anterior wall of bladder

C67.4 Malignant neoplasm of posterior wall of bladder

C67.5 Malignant neoplasm of bladder neck

C67.6 Malignant neoplasm of ureteric orifice

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.