ICD-10 Code D41.4 – Neoplasm of uncertain behavior of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41.4 – Neoplasm of uncertain behavior of bladder
What it is
D41.4 identifies a bladder growth whose behavior cannot be determined as benign or malignant from available information. Use it when the record documents uncertain behavior, not a confirmed cancer diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Patients may have a bladder mass, cystoscopic abnormality, or pathology report stating uncertain behavior, but the code depends on the documented diagnosis, not symptoms alone.
When to use this code
Use D41.4 when the provider documents a neoplasm of uncertain behavior in the bladder, including a lesion awaiting final classification. It also fits cases where pathology or operative notes explicitly state uncertain behavior. If the record later confirms malignancy or benignity, code the final diagnosis instead.
Do not use for
Do not use this code for confirmed bladder cancer, benign bladder lesions, or nonspecific hematuria without a documented neoplasm. Check documentation if the pathology report or clinician note uses different terminology.
Coding tip
Code only when uncertain behavior is stated in the record; otherwise, query or select the final documented bladder diagnosis.