A person with stage 3 chronic kidney disease (CKD) has moderate kidney damage. This stage is broken up into two: a decrease in glomerular filtration rate (GFR) for Stage 3A is 45-59 mL/min and a decrease in GFR for Stage 3B is 30-44 mL/min.
The ICD-10-CM code for Chronic Kidney Disease (CKD) Stage 3 (N18. 3) has been revised for Fiscal Year 2021.
Chronic kidney disease, stage 3a N18. 31 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM N18. 31 became effective on October 1, 2021.
Chronic kidney disease, unspecified N18. 9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM N18. 9 became effective on October 1, 2021.
Stage 3a means you have an eGFR between 45 and 59, and Stage 3b means you have an eGFR between 30 and 44.
Having stage 3 CKD doesn't mean your condition will automatically progress to kidney failure. By working with a doctor and staying on top of lifestyle changes, it's possible to prevent kidney disease from worsening.
Coding CKD. Documenting the stage of CKD—not the GFR—is vital for accurate coding. If the stage is not documented, then code 585.9, Chronic kidney disease, is assigned. If a provider documents both a stage of CKD and ESRD, then only the code for ESRD (585.6) is assigned.
9: Chronic kidney disease, unspecified.
That code is I10, Essential (primary) hypertension. As in ICD-9, this code includes “high blood pressure” but does not include elevated blood pressure without a diagnosis of hypertension (that would be ICD-10 code R03. 0).
Chronic kidney disease, stage 3 (moderate) N18. 3 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail. The 2022 edition of ICD-10-CM N18. 3 became effective on October 1, 2021.
Documenting the stage of CKD—not the GFR—is vital for accurate coding. If the stage is not documented, then code 585.9, Chronic kidney disease, is assigned. If a provider documents both a stage of CKD and ESRD, then only the code for ESRD (585.6) is assigned.
Essential (primary) hypertension: I10 That code is I10, Essential (primary) hypertension. As in ICD-9, this code includes “high blood pressure” but does not include elevated blood pressure without a diagnosis of hypertension (that would be ICD-10 code R03. 0).