CCDS Acute Kidney Injury and Renal Documentation 5

Question 1

A patient on vancomycin for MRSA bacteremia develops creatinine rise from 0.8 to 2.1 mg/dL. The physician documents 'drug-induced nephropathy.' What additional documentation should the CDS seek?

Accepted Answer

The specific drug name and whether it is an adverse effect or poisoning

Answer

Accurate coding requires identifying the specific causative drug and classifying the encounter as an adverse effect (drug taken correctly) versus a poisoning or underdosing, as this affects the T-code selection paired with the nephropathy code.

Question 2

Which clinical scenario best supports documentation of 'pre-renal AKI' for coding and clinical purposes?

Accepted Answer

BUN/Cr ratio >20:1 with rapid creatinine normalization after IV fluid resuscitation

Answer

A BUN-to-creatinine ratio >20:1 combined with prompt creatinine normalization following fluid administration is the hallmark clinical picture of pre-renal AKI due to volume depletion or reduced renal perfusion.

Question 3

A CDS review identifies that a patient had continuous renal replacement therapy (CRRT) for 4 days but the record only documents 'electrolyte management.' What is the appropriate CDS action?

Accepted Answer

Query the physician to document the reason for CRRT and whether AKI or CKD Stage 5 was the indication

Answer

CRRT is a significant procedure that requires physician documentation of the clinical indication (typically AKI Stage 3 or ESRD) to support accurate diagnosis coding and appropriate DRG assignment.

Question 4

Under the Uniform Hospital Discharge Data Set (UHDDS) guidelines, when should AKI be coded as a secondary diagnosis?

Accepted Answer

When it affects patient care, requires clinical evaluation, or prolongs the length of stay

Answer

UHDDS defines additional diagnoses as conditions that affect patient care in terms of requiring clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of stay, or increased nursing care and monitoring.

Question 5

A patient is admitted with AKI and recovers renal function before discharge. The discharge summary states 'resolved AKI.' How should this be coded?

Accepted Answer

Code AKI as a secondary diagnosis because it was present and treated during the encounter

Answer

Conditions that are diagnosed and treated during the hospitalization are coded even if resolved at discharge, as they affected patient care and management during the encounter.

CCDS - Certified Clinical Documentation Specialist Practice Test

CCDS - Certified Clinical Documentation Specialist Practice Test

CCDS Acute Kidney Injury and Renal Documentation 5