2023 ICD-10-CM Diagnosis Code D03.9

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Melanoma in situ, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • D03.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM D03.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of D03.9 - other international versions of ICD-10 D03.9 may differ.
The following code(s) above D03.9 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 D03.9:
  • C00-D49
    2023 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).
  • D00-D09
    2023 ICD-10-CM Range D00-D09

    In situ neoplasms

    • Bowen's disease
    • erythroplasia
    • grade III intraepithelial neoplasia
    • Queyrat's erythroplasia
    In situ neoplasms
Approximate Synonyms
  • Lentigo maligna
  • Melanoma in situ
  • Melanoma in situ by body site (clinical)
Clinical Information
  • A melanoma of the skin characterized by the presence of melanoma cells in the dermal-epidermal junction only, without infiltration of the papillary or reticular dermis.
  • Abnormal melanocytes (cells that make melanin, the pigment that gives skin its color) are found in the epidermis (outer layer of the skin). These abnormal melanocytes may become cancer and spread into nearby normal tissue.
  • Stage 0 includes: tis, n0, m0. Tis: melanoma in situ. N0: no regional lymph node metastases. M0: no detectable evidence of distant metastases. (from ajcc 6th and 7th eds.)
ICD-10-CM D03.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 595 Major skin disorders with mcc
  • 596 Major skin disorders without mcc

Convert D03.9 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to D03.9:
  • Melanoma (malignant) C43.9
    ICD-10-CM Diagnosis Code C43.9

    Malignant melanoma of skin, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Malignant melanoma of unspecified site of skin
    • Melanoma (malignant) NOS

ICD-10-CM Codes Adjacent To D03.9
D03.59 Melanoma in situ of other part of trunk
D03.6 Melanoma in situ of upper limb, including shoulder
D03.60 Melanoma in situ of unspecified upper limb, including shoulder
D03.61 Melanoma in situ of right upper limb, including shoulder
D03.62 Melanoma in situ of left upper limb, including shoulder
D03.7 Melanoma in situ of lower limb, including hip
D03.70 Melanoma in situ of unspecified lower limb, including hip
D03.71 Melanoma in situ of right lower limb, including hip
D03.72 Melanoma in situ of left lower limb, including hip
D03.8 Melanoma in situ of other sites
D03.9 Melanoma in situ, unspecified
D04 Carcinoma in situ of skin
D04.0 Carcinoma in situ of skin of lip
D04.1 Carcinoma in situ of skin of eyelid, including canthus
D04.10 Carcinoma in situ of skin of unspecified eyelid, including canthus
D04.11 Carcinoma in situ of skin of right eyelid, including canthus
D04.111 Carcinoma in situ of skin of right upper eyelid, including canthus
D04.112 Carcinoma in situ of skin of right lower eyelid, including canthus
D04.12 Carcinoma in situ of skin of left eyelid, including canthus
D04.121 Carcinoma in situ of skin of left upper eyelid, including canthus
D04.122 Carcinoma in situ of skin of left lower eyelid, including canthus

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