C79.1
Secondary malignant neoplasm of bladder and other and unspecified urinary organs
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 9 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 2 never code together
Instructional notes 8
C00-D49chapter
Notes
- 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).C25.9
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 9 same parent — C79
C79.0 Secondary malignant neoplasm of kidney and renal pelvis category C79.2 Secondary malignant neoplasm of skin C79.3 Secondary malignant neoplasm of brain and cerebral meninges category C79.4 Secondary malig neoplasm of and unsp parts of nervous sys category C79.5 Secondary malignant neoplasm of bone and bone marrow category C79.6 Secondary malignant neoplasm of ovary category C79.7 Secondary malignant neoplasm of adrenal gland category C79.8 Secondary malignant neoplasm of other specified sites category C79.9 Secondary malignant neoplasm of unspecified site
Subordinate codes 3
Medications 4
108 Urinary Bladder Diseases drugs 25 Urinary Bladder Neoplasms drugs 9 Urinary Bladder, Neurogenic drugs 24 Urinary Bladder Neck Obstruction drugs
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.