ICD-10 Code D48.62 – Neoplasm of uncertain behavior of left breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D48.62 – Neoplasm of uncertain behavior of left breast
What it is
D48.62 identifies a breast lesion in the left breast whose behavior is uncertain. Use it when the record shows a mass or growth that is not clearly documented as benign or malignant.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a palpable breast mass, imaging abnormality, or biopsy result that does not yet establish definite malignant behavior.
When to use this code
Use this code when the provider documents an uncertain or indeterminate neoplasm of the left breast. It is appropriate when pathology, imaging, or clinical assessment leaves the lesion behavior unresolved. Do not infer malignancy or benignity unless the record states it.
Do not use for
Do not use this code for clearly benign left breast lesions, confirmed malignant breast neoplasms, or unspecified breast masses without a neoplasm diagnosis. Check documentation if the lesion type is not explicit.
Coding tip
Verify laterality and the exact wording of the pathology or assessment before assigning D48.62.