Established patient seen in PCP's office for LLQ pain, diagnosis appendicitis, level 2 E/M, arrangements for surgery made and patient heading to hospital. Assign code with appropriate modifier.

Apply the ICD-10-CM Official Guidelines for Coding and Reporting of the Principal Diagnosis for Inpatient Care (Guidelines I A- J) to identify the principal diagnosis in the following scenario.

The patient was admitted to the hospital for a total right knee replacement for osteoarthritis of the knee. During the patient's preoperative preparation, the patient began having chest pain. The patient's knee surgery was canceled, and the patient had extensive testing to determine the source of the chest pain, which was determined to be due to hypertensive heart disease.

Apply the ICD-10-CM Official Guidelines for Coding and Reporting of the Principal Diagnosis for Inpatient Care (Guidelines II A-J) to identify the principal diagnosis in the following scenarios.

Patient was admitted to the hospital with acute pyelonephritis and acute cystitis. Both infections were evaluated and treated with IV antibiotic therapy. THe patient was discharged home to continue taking oral medications.

According to the Section IV: Diagnostic coding and reporting guideline for Outpatient Services, how does the first-listed diagnosis in the outpatient setting differ from the selection of the principal diagnosis in the Inpatient Setting?