ICD-10-CM Codes
C00-D49 Neoplasms
C43-C4A Melanoma and other malignant neoplasms of skin
C43- Malignant melanoma of skin
2021 ICD-10-CM Diagnosis Code C43.12

2021 ICD-10-CM Diagnosis Code C43.12

Malignant melanoma of left eyelid, including canthus

2016

2017

2018

2019 - Converted to Parent Code

2020

2021

Non-Billable/Non-Specific Code

C43.12 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
The 2021 edition of ICD-10-CM C43.12 became effective on October 1, 2020.
This is the American ICD-10-CM version of C43.12 - other international versions of ICD-10 C43.12 may differ.

The following code(s) above C43.12 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 C43.12:

C00-D49
2021 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
C43
ICD-10-CM Diagnosis Code C43
Malignant melanoma of skin
Type 1 Excludes
- melanoma in situ (D03.-)
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

Approximate Synonyms

Malignant melanoma of skin of bilateral eyelids
Malignant melanoma of skin of left eyelid
Melanoma, skin of bilateral eyelids
Melanoma, skin of left eyelid

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): Deleted code
2019 (effective 10/1/2018): New code
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

ICD-10-CM Codes Adjacent To C43.12

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

C43.22 Malignant melanoma of left ear and external auricular canal

C43.3 Malignant melanoma of other and unspecified parts of face

C43.30 Malignant melanoma of unspecified part of face

C43.31 Malignant melanoma of nose

C43.39 Malignant melanoma of other parts of face

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

2021 ICD-10-CM Diagnosis Code C43.12

Malignant melanoma of left eyelid, including canthus

Neoplasms

Malignant melanoma of skin