Non-Billable / Non-Specific Code
ICD-10-CM C79.5 is the diagnosis code for Secondary malignant neoplasm of bone and bone marrow. This code falls under the section "Malignant neoplasms of ill-defined, other secondary and unspecified sites" within Chapter 2 — Neoplasms (C00-D49). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as C79.5. They are mutually exclusive:
Understanding where C79.5 sits in the ICD-10-CM classification helps ensure proper coding:
No, C79.5 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
C79.5 is the ICD-10-CM diagnosis code for "Secondary malignant neoplasm of bone and bone marrow". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of C79.5 is C79 ("Secondary malignant neoplasm of other and unspecified sites"). C79.5 provides a more specific classification within this category.
C79.5 is located in Section C76-C80 — "Malignant neoplasms of ill-defined, other secondary and unspecified sites" within Chapter 2 of the ICD-10-CM Tabular List.
C79.5 has 2 sub-code(s) that provide more specific detail: C79.51, C79.52.
Use C79.5 when the patients documented diagnosis matches "Secondary malignant neoplasm of bone and bone marrow" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Secondary malignant neoplasm of bone and bone marrow is C79.5.
No, C79.5 is non-billable. Use a more specific sub-code for primary diagnosis billing.
C79.5 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C79.5 include: secondary carcinoid tumors of bone (C7B.03).
Yes, C79.5 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.