2022 ICD-10-CM Diagnosis Code C79.51

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2026

  1. ICD-10-CM Codes
  2. C00-D49
  3. C76-C80
  4. C79-
  5. 2026 ICD-10-CM Diagnosis Code C79.51
2026 ICD-10-CM Diagnosis Code C79.51

Secondary malignant neoplasm of bone

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code
  • C79.51 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2026 edition of ICD-10-CM C79.51 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of C79.51 - other international versions of ICD-10 C79.51 may differ.
The following code(s) above C79.51 contain annotation back-referencesAnnotation Back-ReferencesIn 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 C79.51:
  • C00-D49 2026 ICD-10-CM Range C00-D49

    NeoplasmsNote
    • 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

  • C79 ICD-10-CM Diagnosis Code C79

    Secondary malignant neoplasm of other and unspecified sites

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • secondary carcinoid tumors (C7B.-)
    • secondary neuroendocrine tumors (C7B.-)
    Secondary malignant neoplasm of other and unspecified sites
  • C79.5 ICD-10-CM Diagnosis Code C79.5

    Secondary malignant neoplasm of bone and bone marrow

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • secondary carcinoid tumors of bone (C7B.03)
    Secondary malignant neoplasm of bone and bone marrow
Approximate Synonyms
  • Cancer metastatic to bone
  • Cancer metastatic to bone, adenocarcinoma
  • Cancer metastatic to bone, small cell
  • Cancer metastatic to bone, squamous cell
  • Cancer metastatic to bone, undifferentiated large cell
  • Cancer metastatic to leg bones, adamantioma
  • Cancer metastatic to vertebra
  • Cancer of the thyroid, metastatic to bone
  • Melanoma eye, metastatic to bone
  • Melanoma, metastatic to bone
  • Secondary adenocarcinoma of bone
  • Secondary malignant melanoma of bone
  • Secondary malignant melanoma of bone from eye
  • Secondary malignant neoplasm of long bone of lower limb
  • Secondary malignant neoplasm of vertebral column
  • Secondary small cell carcinoma of bone
  • Secondary squamous cell carcinoma of bone
  • Secondary undifferentiated large cell malignant neoplasm of bone
  • Thyroid cancer metastatic to bone
Clinical Information
  • Cancer that has spread from the original (primary) tumor to the bone.
  • The spread of a malignant neoplasm from a primary site to the skeletal system. The majority of metastatic neoplasms to the bone are carcinomas.
ICD-10-CM C79.51 is grouped within Diagnostic Related Group(s) (MS-DRG v43.0):
  • 456 Spinal fusion except cervical with spinal curvature, malignancy, infection or extensive fusions with mcc
  • 457 Spinal fusion except cervical with spinal curvature, malignancy, infection or extensive fusions with cc
  • 458 Spinal fusion except cervical with spinal curvature, malignancy, infection or extensive fusions without cc/mcc
  • 542 Pathological fractures and musculoskeletal and connective tissue malignancy with mcc
  • 543 Pathological fractures and musculoskeletal and connective tissue malignancy with cc
  • 544 Pathological fractures and musculoskeletal and connective tissue malignancy without cc/mcc

Convert C79.51 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
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
  • 2026 (effective 10/1/2025): No change
ICD-10-CM Codes Adjacent To C79.51 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

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

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