ICD-10-CM C44: Other and unspecified malignant neoplasm of skin

ICD-10-CM Diagnosis Code (2025)

Official Description for C44

Other and unspecified malignant neoplasm of skin

Coding Notes & Guidelines for C44

Includes Notes
  • malignant neoplasm of sebaceous glands
  • malignant neoplasm of sweat glands
Excludes1: Not Coded Here
  • Kaposi's sarcoma of skin (C46.0)
  • malignant melanoma of skin (C43.-)
  • malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2)
  • Merkel cell carcinoma (C4A.-)
Excludes1: Not Coded Here

malignant neoplasm of lip (C00.-)

Excludes1: Not Coded Here

connective tissue of eyelid (C49.0)

Excludes1: Not Coded Here

connective tissue of ear (C49.0)

Excludes1: Not Coded Here
  • anus NOS (C21.0)
  • scrotum (C63.2)
Inclusion Terms
  • Unspecified malignant neoplasm of anal margin
  • Unspecified malignant neoplasm of perianal skin
Inclusion Terms
  • Basal cell carcinoma of anal margin
  • Basal cell carcinoma of perianal skin
Inclusion Terms
  • Squamous cell carcinoma of anal margin
  • Squamous cell carcinoma of perianal skin
Inclusion Terms
  • Other specified malignant neoplasm of anal margin
  • Other specified malignant neoplasm of perianal skin
Inclusion Terms

Malignant neoplasm of unspecified site of skin

Child Codes (More Specific Codes for C44):

C44.0 - Other and unspecified malignant neoplasm of skin of lip C44.00 - Unspecified malignant neoplasm of skin of lip C44.01 - Basal cell carcinoma of skin of lip C44.02 - Squamous cell carcinoma of skin of lip C44.09 - Other specified malignant neoplasm of skin of lip C44.1 - Other and unspecified malignant neoplasm of skin of eyelid, including canthus C44.10 - Unspecified malignant neoplasm of skin of eyelid, including canthus C44.101 - Unspecified malignant neoplasm of skin of unspecified eyelid, including canthus C44.102 - Unspecified malignant neoplasm of skin of right eyelid, including canthus C44.1021 - Unspecified malignant neoplasm of skin of right upper eyelid, including canthus C44.1022 - Unspecified malignant neoplasm of skin of right lower eyelid, including canthus C44.109 - Unspecified malignant neoplasm of skin of left eyelid, including canthus C44.1091 - Unspecified malignant neoplasm of skin of left upper eyelid, including canthus C44.1092 - Unspecified malignant neoplasm of skin of left lower eyelid, including canthus C44.11 - Basal cell carcinoma of skin of eyelid, including canthus C44.111 - Basal cell carcinoma of skin of unspecified eyelid, including canthus C44.112 - Basal cell carcinoma of skin of right eyelid, including canthus C44.1121 - Basal cell carcinoma of skin of right upper eyelid, including canthus C44.1122 - Basal cell carcinoma of skin of right lower eyelid, including canthus C44.119 - Basal cell carcinoma of skin of left eyelid, including canthus C44.1191 - Basal cell carcinoma of skin of left upper eyelid, including canthus C44.1192 - Basal cell carcinoma of skin of left lower eyelid, including canthus C44.12 - Squamous cell carcinoma of skin of eyelid, including canthus C44.121 - Squamous cell carcinoma of skin of unspecified eyelid, including canthus C44.122 - Squamous cell carcinoma of skin of right eyelid, including canthus C44.1221 - Squamous cell carcinoma of skin of right upper eyelid, including canthus C44.1222 - Squamous cell carcinoma of skin of right lower eyelid, including canthus C44.129 - Squamous cell carcinoma of skin of left eyelid, including canthus C44.1291 - Squamous cell carcinoma of skin of left upper eyelid, including canthus C44.1292 - Squamous cell carcinoma of skin of left lower eyelid, including canthus C44.13 - Sebaceous cell carcinoma of skin of eyelid, including canthus C44.131 - Sebaceous cell carcinoma of skin of unspecified eyelid, including canthus C44.132 - Sebaceous cell carcinoma of skin of right eyelid, including canthus C44.1321 - Sebaceous cell carcinoma of skin of right upper eyelid, including canthus C44.1322 - Sebaceous cell carcinoma of skin of right lower eyelid, including canthus C44.139 - Sebaceous cell carcinoma of skin of left eyelid, including canthus C44.1391 - Sebaceous cell carcinoma of skin of left upper eyelid, including canthus C44.1392 - Sebaceous cell carcinoma of skin of left lower eyelid, including canthus C44.19 - Other specified malignant neoplasm of skin of eyelid, including canthus C44.191 - Other specified malignant neoplasm of skin of unspecified eyelid, including canthus C44.192 - Other specified malignant neoplasm of skin of right eyelid, including canthus C44.1921 - Other specified malignant neoplasm of skin of right upper eyelid, including canthus C44.1922 - Other specified malignant neoplasm of skin of right lower eyelid, including canthus C44.199 - Other specified malignant neoplasm of skin of left eyelid, including canthus C44.1991 - Other specified malignant neoplasm of skin of left upper eyelid, including canthus C44.1992 - Other specified malignant neoplasm of skin of left lower eyelid, including canthus C44.2 - Other and unspecified malignant neoplasm of skin of ear and external auricular canal C44.20 - Unspecified malignant neoplasm of skin of ear and external auricular canal C44.201 - Unspecified malignant neoplasm of skin of unspecified ear and external auricular canal C44.202 - Unspecified malignant neoplasm of skin of right ear and external auricular canal C44.209 - Unspecified malignant neoplasm of skin of left ear and external auricular canal C44.21 - Basal cell carcinoma of skin of ear and external auricular canal C44.211 - Basal cell carcinoma of skin of unspecified ear and external auricular canal C44.212 - Basal cell carcinoma of skin of right ear and external auricular canal C44.219 - Basal cell carcinoma of skin of left ear and external auricular canal C44.22 - Squamous cell carcinoma of skin of ear and external auricular canal C44.221 - Squamous cell carcinoma of skin of unspecified ear and external auricular canal C44.222 - Squamous cell carcinoma of skin of right ear and external auricular canal C44.229 - Squamous cell carcinoma of skin of left ear and external auricular canal C44.29 - Other specified malignant neoplasm of skin of ear and external auricular canal C44.291 - Other specified malignant neoplasm of skin of unspecified ear and external auricular canal C44.292 - Other specified malignant neoplasm of skin of right ear and external auricular canal C44.299 - Other specified malignant neoplasm of skin of left ear and external auricular canal C44.3 - Other and unspecified malignant neoplasm of skin of other and unspecified parts of face C44.30 - Unspecified malignant neoplasm of skin of other and unspecified parts of face C44.300 - Unspecified malignant neoplasm of skin of unspecified part of face C44.301 - Unspecified malignant neoplasm of skin of nose C44.309 - Unspecified malignant neoplasm of skin of other parts of face C44.31 - Basal cell carcinoma of skin of other and unspecified parts of face C44.310 - Basal cell carcinoma of skin of unspecified parts of face C44.311 - Basal cell carcinoma of skin of nose C44.319 - Basal cell carcinoma of skin of other parts of face C44.32 - Squamous cell carcinoma of skin of other and unspecified parts of face C44.320 - Squamous cell carcinoma of skin of unspecified parts of face C44.321 - Squamous cell carcinoma of skin of nose C44.329 - Squamous cell carcinoma of skin of other parts of face C44.39 - Other specified malignant neoplasm of skin of other and unspecified parts of face C44.390 - Other specified malignant neoplasm of skin of unspecified parts of face C44.391 - Other specified malignant neoplasm of skin of nose C44.399 - Other specified malignant neoplasm of skin of other parts of face C44.4 - Other and unspecified malignant neoplasm of skin of scalp and neck C44.40 - Unspecified malignant neoplasm of skin of scalp and neck C44.41 - Basal cell carcinoma of skin of scalp and neck C44.42 - Squamous cell carcinoma of skin of scalp and neck C44.49 - Other specified malignant neoplasm of skin of scalp and neck C44.5 - Other and unspecified malignant neoplasm of skin of trunk C44.50 - Unspecified malignant neoplasm of skin of trunk C44.500 - Unspecified malignant neoplasm of anal skin C44.501 - Unspecified malignant neoplasm of skin of breast C44.509 - Unspecified malignant neoplasm of skin of other part of trunk C44.51 - Basal cell carcinoma of skin of trunk C44.510 - Basal cell carcinoma of anal skin C44.511 - Basal cell carcinoma of skin of breast C44.519 - Basal cell carcinoma of skin of other part of trunk C44.52 - Squamous cell carcinoma of skin of trunk C44.520 - Squamous cell carcinoma of anal skin C44.521 - Squamous cell carcinoma of skin of breast C44.529 - Squamous cell carcinoma of skin of other part of trunk C44.59 - Other specified malignant neoplasm of skin of trunk C44.590 - Other specified malignant neoplasm of anal skin C44.591 - Other specified malignant neoplasm of skin of breast C44.599 - Other specified malignant neoplasm of skin of other part of trunk C44.6 - Other and unspecified malignant neoplasm of skin of upper limb, including shoulder C44.60 - Unspecified malignant neoplasm of skin of upper limb, including shoulder C44.601 - Unspecified malignant neoplasm of skin of unspecified upper limb, including shoulder C44.602 - Unspecified malignant neoplasm of skin of right upper limb, including shoulder C44.609 - Unspecified malignant neoplasm of skin of left upper limb, including shoulder C44.61 - Basal cell carcinoma of skin of upper limb, including shoulder C44.611 - Basal cell carcinoma of skin of unspecified upper limb, including shoulder C44.612 - Basal cell carcinoma of skin of right upper limb, including shoulder C44.619 - Basal cell carcinoma of skin of left upper limb, including shoulder C44.62 - Squamous cell carcinoma of skin of upper limb, including shoulder C44.621 - Squamous cell carcinoma of skin of unspecified upper limb, including shoulder C44.622 - Squamous cell carcinoma of skin of right upper limb, including shoulder C44.629 - Squamous cell carcinoma of skin of left upper limb, including shoulder C44.69 - Other specified malignant neoplasm of skin of upper limb, including shoulder C44.691 - Other specified malignant neoplasm of skin of unspecified upper limb, including shoulder C44.692 - Other specified malignant neoplasm of skin of right upper limb, including shoulder C44.699 - Other specified malignant neoplasm of skin of left upper limb, including shoulder C44.7 - Other and unspecified malignant neoplasm of skin of lower limb, including hip C44.70 - Unspecified malignant neoplasm of skin of lower limb, including hip C44.701 - Unspecified malignant neoplasm of skin of unspecified lower limb, including hip C44.702 - Unspecified malignant neoplasm of skin of right lower limb, including hip C44.709 - Unspecified malignant neoplasm of skin of left lower limb, including hip C44.71 - Basal cell carcinoma of skin of lower limb, including hip C44.711 - Basal cell carcinoma of skin of unspecified lower limb, including hip C44.712 - Basal cell carcinoma of skin of right lower limb, including hip C44.719 - Basal cell carcinoma of skin of left lower limb, including hip C44.72 - Squamous cell carcinoma of skin of lower limb, including hip C44.721 - Squamous cell carcinoma of skin of unspecified lower limb, including hip C44.722 - Squamous cell carcinoma of skin of right lower limb, including hip C44.729 - Squamous cell carcinoma of skin of left lower limb, including hip C44.79 - Other specified malignant neoplasm of skin of lower limb, including hip C44.791 - Other specified malignant neoplasm of skin of unspecified lower limb, including hip C44.792 - Other specified malignant neoplasm of skin of right lower limb, including hip C44.799 - Other specified malignant neoplasm of skin of left lower limb, including hip C44.8 - Other and unspecified malignant neoplasm of overlapping sites of skin C44.80 - Unspecified malignant neoplasm of overlapping sites of skin C44.81 - Basal cell carcinoma of overlapping sites of skin C44.82 - Squamous cell carcinoma of overlapping sites of skin C44.89 - Other specified malignant neoplasm of overlapping sites of skin C44.9 - Other and unspecified malignant neoplasm of skin, unspecified C44.90 - Unspecified malignant neoplasm of skin, unspecified C44.91 - Basal cell carcinoma of skin, unspecified C44.92 - Squamous cell carcinoma of skin, unspecified C44.99 - Other specified malignant neoplasm of skin, unspecified

About ICD-10-CM Code C44 (Other and unspecified malignant neoplasm of skin)

ICD-10-CM code C44 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM C44 became effective on October 1, 2024.

This page provides detailed information about C44 - Other and unspecified malignant neoplasm of skin. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other and unspecified malignant neoplasm of skin.