CCDS Acute Kidney Injury and Renal Documentation 3

Question 1

According to ICD-10-CM conventions, how are the terms 'acute kidney failure' and 'acute kidney injury' treated for coding purposes?

Accepted Answer

The terms are treated as equivalent and both are captured under the N17.x code category

Answer

ICD-10-CM treats 'acute kidney failure' and 'acute kidney injury' as clinically equivalent terms, both assigned to the N17.x category regardless of dialysis status.

Question 2

A CDI specialist notices a patient receiving continuous renal replacement therapy (CRRT). What documentation query is most critical if not already present?

Accepted Answer

Specification of AKI Stage 3, since initiation of renal replacement therapy is a defining KDIGO criterion

Answer

Per KDIGO criteria, initiation of any renal replacement therapy — including CRRT — automatically meets Stage 3 AKI criteria regardless of creatinine or urine output levels.

Question 3

A patient's discharge summary documents 'acute renal failure' and the medical record contains clinical evidence supporting KDIGO Stage 2 AKI. What is the appropriate CDI action?

Accepted Answer

Query the physician to specify the AKI stage for more accurate and specific code assignment

Answer

Querying the physician to specify the AKI stage enables more precise ICD-10-CM code assignment, which may affect CC/MCC classification and MS-DRG weight.

Question 4

When a nephrologist documents 'worsening renal function' without a specific diagnosis, what is the CDI specialist's most appropriate response?

Accepted Answer

Issue a compliant query to clarify whether AKI or CKD exacerbation is the clinical diagnosis

Answer

Vague descriptions like 'worsening renal function' are not codeable diagnoses; CDI specialists should issue a compliant query when clinical indicators support AKI or another specific renal condition.

Question 5

What is the primary significance of establishing a patient's baseline creatinine in AKI documentation for CDI purposes?

Accepted Answer

It establishes the reference point required to apply KDIGO AKI staging criteria accurately

Answer

KDIGO AKI staging requires comparing the current creatinine to the patient's known or estimated baseline, making baseline creatinine documentation critical for accurate staging.

CCDS - Certified Clinical Documentation Specialist Practice Test

CCDS - Certified Clinical Documentation Specialist Practice Test

CCDS Acute Kidney Injury and Renal Documentation 3