Non-follic lymphoma, unsp, nodes of axilla and upper limb

This code signifies a diagnosis of non-follicular lymphoma, which is a type of non-Hodgkin lymphoma characterized by diffuse growth patterns rather than distinct follicles. The specific anatomical location of this lymphoma is limited to the lymph nodes found in the axilla and upper limb. The "unspecified" nature indicates that further histological subtyping of the non-follicular lymphoma is not documented.

Apply this code when documentation confirms a diagnosis of diffuse non-follicular lymphoma affecting the lymph nodes of the armpit or upper extremity, and the specific subtype of non-follicular lymphoma is not identified. This code is appropriate when pathology reports confirm diffuse lymphoma in these regions but lack further detail on the specific cell type (e.g., diffuse large B-cell lymphoma, peripheral T-cell lymphoma).

• Ensure the documentation explicitly states "non-follicular" or "diffuse" lymphoma and specifies involvement of axillary or upper limb lymph nodes.
• Avoid using this code if a more specific histological subtype of non-follicular lymphoma is identified; instead, use the appropriate sub-code.
• Always sequence this code as a primary diagnosis when it is the reason for the encounter, unless another condition is clearly the primary reason for admission or visit.