C43.9 – Malignant melanoma of skin, unspecified
ICD-10-CM 2027 diagnosis code · Melanoma and other malignant neoplasms of skin
ICD-10-CM code
C43.9
- Code
C43.9(claims format:C439)- Description
- Malignant melanoma of skin, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- C43-C44 Melanoma and other malignant neoplasms of skin
- Parent codes
- C43
Notes for C43.9
Applicable to:
- Malignant melanoma of unspecified site of skin
- Melanoma (malignant) NOS
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C43 – Malignant melanoma of skin
Excludes1 (not coded here):
- melanoma in situ (D03.-)
Index terms for C43.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in C43
- C43.0 – Malignant melanoma of lipBillable
- C43.1 – Malignant melanoma of eyelid, including canthusHeader
- C43.2 – Malignant melanoma of ear and external auricular canalHeader
- C43.3 – Malignant melanoma of other and unspecified parts of faceHeader
- C43.4 – Malignant melanoma of scalp and neckBillable
- C43.5 – Malignant melanoma of trunkHeader
- C43.6 – Malignant melanoma of upper limb, including shoulderHeader
- C43.7 – Malignant melanoma of lower limb, including hipHeader
- C43.8 – Malignant melanoma of overlapping sites of skinBillable
Frequently asked questions
What is ICD-10 code C43.9?
C43.9 is the ICD-10-CM code for malignant melanoma of skin, unspecified, in the block C43-C44 (Melanoma and other malignant neoplasms of skin).
Is C43.9 a billable code?
Yes. C43.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does C43.9 belong to?
It belongs to category C43 – Malignant melanoma of skin.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.