AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2016 Issue 4; ICD-10-CM NEW/REVISED CODES

Atypical Small Acinar Proliferation

Code N42.3 has been expanded to uniquely identify unspecified dysplasia of prostate (N42.30), prostatic intraepithelial neoplasia (N42.31), atypical small acinar proliferation of prostate (N42.32), and other dysplasia of prostate (N42.39). Prior to this change, ICD-10-CM only provided code N42.3, Dysplasia of prostate; however this code did not include atypical small acinar proliferation of prostate. Atypical small acinar proliferation (ASAP) is a pathological finding of a group of small prostatic glands that are suspicious for, but not diagnostic of, malignancy. Although ASAP implies an underlying carcinoma, the condition is not diagnosable because of qualitative...

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