C4A.1 Merkel cell carcinoma of eyelid, including canthus

Non-billable header with 3 child codes.

Codes under C4A.1

• C4A.10 Merkel cell carcinoma of unspecified eyelid, including canthus
• C4A.11 Merkel cell carcinoma of right eyelid, including canthus
• C4A.12 Merkel cell carcinoma of left eyelid, including canthus

Code annotations containing back-references to C4A.1

Back-references to C4A

• Type 2 Excludes: C43 Malignant melanoma of skin ("Merkel cell carcinoma (C4A.-)")
• Type 1 Excludes: C44 Other and unspecified malignant neoplasm of skin ("Merkel cell carcinoma (C4A.-)")
• Type 2 Excludes: C7A Malignant neuroendocrine tumors ("Merkel cell carcinoma (C4A.-)")

Diagnosis Index entries for C4A.1

• Carcinoma (malignant) › Merkel cell › canthus
• Carcinoma (malignant) › Merkel cell › eyelid, including canthus

Nearby codes

• C4A Merkel cell carcinoma
• C4A.0 Merkel cell carcinoma of lip
• C4A.1 Merkel cell carcinoma of eyelid, including canthus (this code)
• C4A.10 Merkel cell carcinoma of unspecified eyelid, including canthus
• C4A.11 Merkel cell carcinoma of right eyelid, including canthus
• C4A.111 Merkel cell carcinoma of right upper eyelid, including canthus
• C4A.112 Merkel cell carcinoma of right lower eyelid, including canthus
• C4A.12 Merkel cell carcinoma of left eyelid, including canthus