C65.9 is the authoritative medical code for Malignant neoplasm of unspecified renal pelvis. This classification is used in medical billing and clinical recording to specify the clinical criteria for malignant neoplasm of unspecified renal pelvis (ICD-10-CM C65.9), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Malignant neoplasm of unspecified renal pelvis is a billable ICD-10-CM diagnosis code C65.9. Includes: malignant neoplasm of pelviureteric junction; malignant neoplasm of renal calyces.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C65.9 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- malignant neoplasm of pelviureteric junction
- malignant neoplasm of renal calyces
Codes in This Family (3)
Official ICD-10-CM classifications in the same code family as C65.9, with their registry titles.
- C65 — Malignant neoplasm of renal pelvis
- C65.1 — Malignant neoplasm of right renal pelvis
- C65.2 — Malignant neoplasm of left renal pelvis
Neoplasm Table Sites (9)
Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.
- Neoplasm, neoplastic, calyx, renal — Malignant, Primary
- Neoplasm, neoplastic, junction, pelviureteric — Malignant, Primary
- Neoplasm, neoplastic, kidney (parenchymal), calyx — Malignant, Primary
- Neoplasm, neoplastic, kidney (parenchymal), hilus — Malignant, Primary
- Neoplasm, neoplastic, kidney (parenchymal), pelvis — Malignant, Primary
- Neoplasm, neoplastic, pelvis, pelvic, renal — Malignant, Primary
- Neoplasm, neoplastic, renal, calyx — Malignant, Primary
- Neoplasm, neoplastic, renal, hilus — Malignant, Primary
- Neoplasm, neoplastic, renal, pelvis — Malignant, Primary
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code C62.9
Malignant neoplasm of testis, unspecified whether descended or undescended
ICD Code C64.9
Malignant neoplasm of unspecified kidney, except renal pelvis