C49.AGastrointestinal stromal tumor

C49.A is the ICD-10-CM diagnosis code for gastrointestinal stromal tumor. It belongs to category C49 (malignant neoplasm of other connective and soft tissue), block C45-C49 (malignant neoplasms of mesothelial and soft tissue) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within C49 (malignant neoplasm of other connective and soft tissue), C49.A is specifically for gastrointestinal stromal tumor. Related codes cover malignant neoplasm of connective and soft tissue of head, face and neck (C49.0), malignant neoplasm of connective and soft tissue of upper limb, including shoulder (C49.1), malignant neoplasm of connective and soft tissue of lower limb, including hip (C49.2), malignant neoplasm of connective and soft tissue of thorax (C49.3), malignant neoplasm of connective and soft tissue of abdomen (C49.4), malignant neoplasm of connective and soft tissue of pelvis (C49.5), malignant neoplasm of connective and soft tissue of trunk, unspecified (C49.6), malignant neoplasm of overlapping sites of connective and soft tissue (C49.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: C49.A0 (unspecified site), C49.A1 (of esophagus), C49.A2 (of stomach), C49.A3 (of small intestine), C49.A4 (of large intestine), C49.A5 (of rectum) and C49.A9 (of other sites).

It was added in FY2017, effective October 1, 2016.