AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2020 Issue 4; New/Revised ICD-10-CM Codes
Stage 3 Chronic Kidney Disease
Code N18.3, Chronic kidney disease, stage 3 (moderate), has been expanded to capture additional stage 3 detail and differentiate chronic kidney disease (CKD) stage 3 unspecified (N18.30), CKD stage 3a (N18.31), and CKD stage 3b (N18.32).Current clinical practice for renal function monitoring is to calculate estimated glomerular filtration rate (eGFR), using inputs of serum creatinine concentration and several other parameters including height, weight, gender, and ethnicity. Stage 3 CKD involves an eGFR between 30 and 59. Stage 3 is further subdivided based on the eGFR into stage 3a (eGFR between 45 and 59) and...
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Article Overview
This article covers stage 3 chronic kidney disease within ICD-10-CM, including how the diagnosis is divided into more specific stage 3 categories and the general clinical basis for kidney function staging. It is intended for coders, clinical documentation specialists, and other healthcare professionals who need to understand how the updated diagnostic detail is reflected in documentation and code selection. The article also places the coding update in the context of eGFR-based renal monitoring and provider documentation.
Why This Topic Matters
Stage 3 chronic kidney disease is commonly documented in clinical records, and greater specificity affects diagnostic clarity and coding accuracy. Understanding the expanded stage 3 structure helps support consistent documentation and appropriate code assignment.
What You Will Learn
- How stage 3 chronic kidney disease is categorized in ICD-10-CM
- How renal function staging relates to eGFR-based assessment
- What kinds of documentation detail are relevant to stage 3 CKD specificity
- How the article frames the transition from general stage 3 documentation to more specific stage 3 subcategories
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation improvement specialists
- Healthcare providers
- Revenue cycle professionals
Codes Discussed
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