Final answer:
The coding rule that applies to this case is the International Classification of Diseases, Tenth Revision (ICD-10) coding system.
Step-by-step explanation:
The coding rule that applies to this case is the International Classification of Diseases, Tenth Revision (ICD-10) coding system. In this case, the final diagnosis of acute renal failure and hypertension would need to be coded using the appropriate ICD-10 codes. Acute renal failure would be coded using N17, and hypertension would be coded using I10. These codes ensure accurate and standardized reporting of diagnoses in medical records and healthcare systems.