2018/2019 ICD-10-CM Diagnosis Code C43.1

Malignant melanoma of eyelid, including canthus

The following code(s) above C43.1 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 C43.1:
  • C00-D49
    2019 ICD-10-CM Range C00-D49


    • 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).
  • C43
    ICD-10-CM Diagnosis Code C43

    Malignant melanoma of skin

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-)
    • Merkel cell carcinoma (C4A.-)
    • sites other than skin-code to malignant neoplasm of the site
    Malignant melanoma of skin
Code History
Code annotations containing back-references to C43.1:

Diagnosis Index entries containing back-references to C43.1:

ICD-10-CM Codes Adjacent To C43.1
C40.92 Malignant neoplasm of unspecified bones and articular cartilage of left limb
C41 Malignant neoplasm of bone and articular cartilage of other and unspecified sites
C41.0 Malignant neoplasm of bones of skull and face
C41.1 Malignant neoplasm of mandible
C41.2 Malignant neoplasm of vertebral column
C41.3 Malignant neoplasm of ribs, sternum and clavicle
C41.4 Malignant neoplasm of pelvic bones, sacrum and coccyx
C41.9 Malignant neoplasm of bone and articular cartilage, unspecified
C43 Malignant melanoma of skin
C43.0 Malignant melanoma of lip
C43.1 Malignant melanoma of eyelid, including canthus
C43.10 Malignant melanoma of unspecified eyelid, including canthus
C43.11 Malignant melanoma of right eyelid, including canthus
C43.111 Malignant melanoma of right upper eyelid, including canthus
C43.112 Malignant melanoma of right lower eyelid, including canthus
C43.12 Malignant melanoma of left eyelid, including canthus
C43.121 Malignant melanoma of left upper eyelid, including canthus
C43.122 Malignant melanoma of left lower eyelid, including canthus
C43.2 Malignant melanoma of ear and external auricular canal
C43.20 Malignant melanoma of unspecified ear and external auricular canal
C43.21 Malignant melanoma of right ear and external auricular canal

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