2020 ICD-10-CM Diagnosis Code C79.2

Secondary malignant neoplasm of skin

    2016 2017 2018 2019 2020 Billable/Specific Code
  • C79.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM C79.2 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of C79.2 - other international versions of ICD-10 C79.2 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as C79.2. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • secondary Merkel cell carcinoma (
    ICD-10-CM Diagnosis Code C7B.1

    Secondary Merkel cell carcinoma

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Merkel cell carcinoma nodal presentation
    • Merkel cell carcinoma visceral metastatic presentation
    C7B.1
    )
The following code(s) above C79.2 contain annotation back-references
Annotation Back-References
In 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 C79.2:
  • C00-D49
    2020 ICD-10-CM Range C00-D49

    Neoplasms

    Note
    • 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 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • secondary carcinoid tumors (C7B.-)
    • secondary neuroendocrine tumors (C7B.-)
    Secondary malignant neoplasm of other and unspecified sites
Approximate Synonyms
  • Cancer metastatic to skin
  • Cancer metastatic to skin undifferentiated lg cell
  • Cancer metastatic to skin, adenocarcinoma
  • Cancer metastatic to skin, small cell
  • Cancer metastatic to skin, squamous
  • Melanoma eye, metastatic to skin
  • Melanoma, metastatic to skin
  • Secondary adenocarcinoma of skin
  • Secondary malignant melanoma of skin
  • Secondary malignant melanoma of skin from eye
  • Secondary small cell carcinoma of skin
  • Secondary squamous cell carcinoma of skin
  • Secondary undifferentiated large cell malignant neoplasm of skin
Clinical Information
  • The spread of the cancer to the skin. This may be from a primary skin cancer, or from a cancer at a distant site.
ICD-10-CM C79.2 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 582 Mastectomy for malignancy with cc/mcc
  • 583 Mastectomy for malignancy without cc/mcc
  • 597 Malignant breast disorders with mcc
  • 598 Malignant breast disorders with cc
  • 599 Malignant breast disorders without cc/mcc

Convert C79.2 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
ICD-10-CM Codes Adjacent To C79.2
C78.89 Secondary malignant neoplasm of other digestive organs
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

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