Explanation
It is appropriate to code the pneumonia in this scenario because the condition is still present and being treated at the time of admission to the long-term care facility. According to the ICD-10-CM Official Guidelines for Coding and Reporting, a diagnosis is reportable if it is documented as "present on admission" or "active" by the provider, or if it requires or affects patient care treatment or management 2. In this case, the pneumonia is still active and requires IV antibiotics and a repeat x-ray, which indicates that it affects the patient care treatment and management. Therefore, the pneumonia should be coded as J18.9, Pneumonia, unspecified organism, which is the default code for pneumonia when no causal organism is identified 3. In addition, the code Z79.2, Long term (current) use of antibiotics, should be coded to indicate that the patient is receiving long term antibiotic therapy as part of the treatment plan 4.
References: 1: AHIMA CDIP Exam Prep, Fourth Edition, p. 138 5 2: ICD-10-CM Official Guidelines for Coding and Reporting FY 2021, Section I.B.14 3: ICD-10-CM Code J18.9 - Pneumonia, unspecified organism 4: ICD-10-CM Code Z79.2 - Long term (current) use of antibiotics