DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C79 Secondary malignant neoplasm of other and unspecified sites

  • Header · not billable

C79 is not billable. The category heads 25 billable codes in FY2027, grouped under 10 subdivisions.

FY2027 changes under C79: 1 billable code added. All FY2027 changes.

Index → code

  • Krukenberg'stumor → C79.6-
  • TumorKrukenberg's → C79.6-
  • Disease, diseasedmetastatic → C79.9

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C76-C80 Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80)
  3. C79 Secondary malignant neoplasm of other and unspecified sites
Billable codes
25
Subdivisions
10
CC / MCC codes
25 / 0
HCC V28 codes
24
New FY2027
1
Index entries
7

Codes in C79

  1. C79.0
    Secondary malignant neoplasm of kidney and renal pelvis
    Header
  2. C79.00
    Secondary malignant neoplasm of unspecified kidney and renal pelvis
    BillableCC17
  3. C79.01
    Secondary malignant neoplasm of right kidney and renal pelvis
    BillableCC17
  4. C79.02
    Secondary malignant neoplasm of left kidney and renal pelvis
    BillableCC17
  5. C79.1
    Secondary malignant neoplasm of bladder and other and unspecified urinary organs
    Header
  6. C79.10
    Secondary malignant neoplasm of unspecified urinary organs
    BillableCC18
  7. C79.11
    Secondary malignant neoplasm of bladder
    BillableCC18
    Excludes2 1

    Excludes2

    • lymph node metastases (C77.0) C77.0
  8. C79.19
    Secondary malignant neoplasm of other urinary organs
    BillableCC18
  9. C79.2
    Secondary malignant neoplasm of skin
    BillableCC18
    Excludes1 1

    Excludes1

    • secondary Merkel cell carcinoma (C7B.1) C7B.1
  10. C79.3
    Secondary malignant neoplasm of brain and cerebral meninges
    Header
  11. C79.31
    Secondary malignant neoplasm of brain
    BillableCC17
  12. C79.32
    Secondary malignant neoplasm of cerebral meninges
    BillableCC17
  13. C79.4
    Secondary malignant neoplasm of other and unspecified parts of nervous system
    Header
  14. C79.40
    Secondary malignant neoplasm of unspecified part of nervous system
    BillableCC17
  15. C79.49
    Secondary malignant neoplasm of other parts of nervous system
    BillableCC17
  16. C79.5
    Secondary malignant neoplasm of bone and bone marrow
    Header
    Excludes1 1

    Excludes1

    • secondary carcinoid tumors of bone (C7B.03) C7B.03
  17. C79.51
    Secondary malignant neoplasm of bone
    BillableCC18
  18. C79.52
    Secondary malignant neoplasm of bone marrow
    BillableCC18
  19. C79.6
    Secondary malignant neoplasm of ovary
    Header
  20. C79.60
    Secondary malignant neoplasm of unspecified ovary
    BillableCC18
  21. C79.61
    Secondary malignant neoplasm of right ovary
    BillableCC18
  22. C79.62
    Secondary malignant neoplasm of left ovary
    BillableCC18
  23. C79.63
    Secondary malignant neoplasm of bilateral ovaries
    BillableCC18
  24. C79.7
    Secondary malignant neoplasm of adrenal gland
    Header
  25. C79.70
    Secondary malignant neoplasm of unspecified adrenal gland
    BillableCC17
  26. C79.71
    Secondary malignant neoplasm of right adrenal gland
    BillableCC17
  27. C79.72
    Secondary malignant neoplasm of left adrenal gland
    BillableCC17
  28. C79.8
    Secondary malignant neoplasm of other specified sites
    Header
  29. C79.81
    Secondary malignant neoplasm of breast
    BillableCC18
  30. C79.82
    Secondary malignant neoplasm of genital organs
    BillableCC18
  31. C79.83
    Secondary malignant neoplasm of oral cavity New FY2027
    BillableCC
  32. C79.89
    Secondary malignant neoplasm of other specified sites
    BillableCC18
  33. C79.9
    Secondary malignant neoplasm of unspecified site
    BillableCC18
    Inclusion terms 2, Excludes1 3

    Inclusion terms

    • Metastatic cancer NOS
    • Metastatic disease NOS

    Excludes1

    • carcinomatosis NOS (C80.0) C80.0
    • generalized cancer NOS (C80.0) C80.0
    • malignant (primary) neoplasm of unspecified site (C80.1) C80.1

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At C79

Excludes1

  • secondary carcinoid tumors (C7B.-) C7B
  • secondary neuroendocrine tumors (C7B.-) C7B

Notes that also apply

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Krukenberg'stumor → C79.6-
  • TumorKrukenberg's → C79.6-
  • Disease, diseasedmetastatic → C79.9
  • Metastasis, metastaticdisease → C79.9
  • Melanoma (malignant)metastaticbreast → C79.81
  • Melanoma (malignant)metastaticgenital organ → C79.82
  • Melanoma (malignant)metastaticspecified site NEC → C79.89

NCHS Alphabetic Index. Index first, then the Tabular List.

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