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Oncology & Hematology Coding Alert

Oncology/Hematology Coding:

Be Certain With Uncertain Behavior Code Assignment

Published on Mon Nov 02, 2026

Question: I am still very unsure about when to use an uncertain behavior or an unspecified behavior diagnosis code. What advice can you give that will help me get this right? Revenue Cycle Insider Subscriber Answer: Simply stated, ICD-10-CM tells you neoplasms of uncertain behavior are neoplasms of “a specific histology type that the pathologist identifies when a neoplasm is [...]
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