Chronic kidney disease, stage 3b

This code represents a moderate to severe reduction in kidney function, specifically chronic kidney disease (CKD) where the estimated glomerular filtration rate (eGFR) is between 30 and 44 mL/min/1.73 m². It indicates a significant and persistent decline in the kidneys' ability to filter waste products from the blood.

Use this code when a patient has a confirmed diagnosis of CKD with an eGFR consistently falling within the 30-44 mL/min/1.73 m² range, as documented by the physician. This stage often involves monitoring for complications and potential interventions to slow disease progression.

• Always sequence this code after any underlying cause of the CKD (e.g., diabetes, hypertension).
• Ensure the medical record clearly documents the eGFR value and the physician's assessment of CKD stage 3b.
• Do not use this code if the documentation specifies CKD stage 3a (eGFR 45-59 mL/min/1.73 m²) or stage 4 (eGFR 15-29 mL/min/1.73 m²).