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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Article Overview
This article is for coders, auditors, and clinical documentation staff who need to understand an ICD-10-CM change related to prostate dysplasia terminology. It summarizes the scope of the code expansion, places atypical small acinar proliferation in a clinical context, and explains why the update matters for accurate documentation and diagnosis reporting.
Why This Topic Matters
The article highlights a terminology update that changes how certain prostate pathology findings are represented in ICD-10-CM. Understanding the change helps support more precise documentation review and consistent diagnosis coding.
What You Will Learn
- How an ICD-10-CM prostate dysplasia code was expanded
- What broad clinical context surrounds atypical small acinar proliferation
- Why terminology precision matters for prostate pathology reporting
- How the article frames the relationship between the update and documentation accuracy
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation integrity specialists
- Urology practice staff
- Revenue cycle professionals
Codes Discussed
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