C79.8 is the authoritative medical code for Secondary malignant neoplasm of other specified sites. This classification is used in medical billing and clinical recording to specify the clinical criteria for secondary malignant neoplasm of other specified sites (ICD-10-CM C79.8), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Secondary malignant neoplasm of other specified sites is a non-billable ICD-10-CM category code C79.8. A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): secondary carcinoid tumors C7B.-; secondary neuroendocrine tumors C7B.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C79.8 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- secondary carcinoid tumors C7B.-
- secondary neuroendocrine tumors C7B.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can C79.8 be billed directly?
No. C79.8 (Secondary malignant neoplasm of other specified sites) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
What can't be coded together with C79.8?
Per Excludes1 instructions, C79.8 must not be reported with: secondary carcinoid tumors (C7B.-); secondary neuroendocrine tumors (C7B.-).
Codes in This Family (32)
Official ICD-10-CM classifications in the same code family as C79.8, with their registry titles.
- C79 — Secondary malignant neoplasm of other and unspecified sites
- C79.0 — Secondary malignant neoplasm of kidney and renal pelvis
- C79.00 — Secondary malignant neoplasm of unspecified kidney and renal pelvis
- C79.01 — Secondary malignant neoplasm of right kidney and renal pelvis
- C79.02 — Secondary malignant neoplasm of left kidney and renal pelvis
- C79.1 — Secondary malignant neoplasm of bladder and other and unspecified urinary organs
- C79.10 — Secondary malignant neoplasm of unspecified urinary organs
- C79.11 — Secondary malignant neoplasm of bladder
- C79.19 — Secondary malignant neoplasm of other urinary organs
- C79.2 — Secondary malignant neoplasm of skin
- C79.3 — Secondary malignant neoplasm of brain and cerebral meninges
- C79.31 — Secondary malignant neoplasm of brain
- C79.32 — Secondary malignant neoplasm of cerebral meninges
- C79.4 — Secondary malignant neoplasm of other and unspecified parts of nervous system
- C79.40 — Secondary malignant neoplasm of unspecified part of nervous system
- C79.49 — Secondary malignant neoplasm of other parts of nervous system
- C79.5 — Secondary malignant neoplasm of bone and bone marrow
- C79.51 — Secondary malignant neoplasm of bone
- C79.52 — Secondary malignant neoplasm of bone marrow
- C79.6 — Secondary malignant neoplasm of ovary
- C79.60 — Secondary malignant neoplasm of unspecified ovary
- C79.61 — Secondary malignant neoplasm of right ovary
- C79.62 — Secondary malignant neoplasm of left ovary
- C79.63 — Secondary malignant neoplasm of bilateral ovaries
- C79.7 — Secondary malignant neoplasm of adrenal gland
- C79.70 — Secondary malignant neoplasm of unspecified adrenal gland
- C79.71 — Secondary malignant neoplasm of right adrenal gland
- C79.72 — Secondary malignant neoplasm of left adrenal gland
- C79.81 — Secondary malignant neoplasm of breast
- C79.82 — Secondary malignant neoplasm of genital organs
- C79.89 — Secondary malignant neoplasm of other specified sites
- C79.9 — Secondary malignant neoplasm of unspecified site
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, abdomen, abdominal — Malignant, Secondary
- Neoplasm, neoplastic, abdomen, abdominal, cavity — Malignant, Secondary
- Neoplasm, neoplastic, abdomen, abdominal, organ — Malignant, Secondary
- Neoplasm, neoplastic, abdomen, abdominal, viscera — Malignant, Secondary
- Neoplasm, neoplastic, abdomen, abdominal, wall, connective tissue — Malignant, Secondary
- Neoplasm, neoplastic, abdominopelvic — Malignant, Secondary
- Neoplasm, neoplastic, alveolar, ridge or process, carcinoma — Malignant, Secondary
- Neoplasm, neoplastic, alveolar, ridge or process, carcinoma, lower — Malignant, Secondary
- Neoplasm, neoplastic, alveolar, ridge or process, carcinoma, upper — Malignant, Secondary
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 C75.8
Malignant neoplasm with pluriglandular involvement, unspecified
ICD Code C76.8
Malignant neoplasm of other specified ill-defined sites
ICD Code C77.8
Secondary and unspecified malignant neoplasm of lymph nodes of multiple regions
ICD Code C78.8
Secondary malignant neoplasm of other and unspecified digestive organs