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  2. ICD-10-CM Codes List
  3. C00–D49
  4. C76-C80
  5. Malignant neoplasm of other and ill-defined sites (C76)

Malignant neoplasm of other and ill-defined sites (C76)

The ICD-10 code section C76 covers malignant neoplasms occurring in other and ill-defined anatomical sites that do not fall into more specific cancer categories. These codes are used to document cancers in less common or anatomically ambiguous locations such as parts of the head, thorax, abdomen, pelvis, and limbs.

Specifically, C76.0 refers to malignant tumors of the head, face, and neck, including conditions also known as adenocarcinoma of the neck or malignant melanoma of head and neck. Codes like C76.1 and C76.2 address cancers in the thorax and abdomen, respectively, capturing tumors such as primary thoracic neuroblastoma or malignant melanoma of the chest wall. Lower limb and upper limb malignancies are classified under C76.4 and C76.5, with subcodes differentiating right, left, or unspecified limbs. The section also includes C76.8 for malignant neoplasms of other specified but ill-defined sites such as the trunk or flank. Using these codes helps healthcare professionals accurately identify and report rare or overlapping tumors when precise anatomical location is unclear.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • malignant neoplasm of female genitourinary tract NOS C57.9
  • malignant neoplasm of male genitourinary tract NOS C63.9
  • malignant neoplasm of lymphoid, hematopoietic and related tissue C81 C96
  • malignant neoplasm of skin C44
  • malignant neoplasm of unspecified site NOS C80.1

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Perineum

The body region lying between the genital area and the ANUS on the surface of the trunk, and to the shallow compartment lying deep to this area that is inferior to the PELVIC DIAPHRAGM. The surface area is between the VULVA and the anus in the female, and between the SCROTUM and the anus in the male.