A physician performed an aspiration via thoracentesis on a patient in observation status in the hosptial. The patient has advanced lung cancer with malignant pleural effusion. Later the same day, due to continued accumulation of fluid, the patient was returned to the procedure room and the same physician performed a repeat thoracentesis.

Do not code observation status.

two diagnosis codes: two CPT codes are needed``

To determine the correct diagnosis codes and CPT codes for this scenario, we need to consider the information provided.

1. Diagnosis Codes:
The patient has advanced lung cancer with a malignant pleural effusion. To code these conditions, we will need two diagnosis codes:
- Advanced lung cancer: The specific code will depend on the type and stage of lung cancer. For example, if it's non-small cell lung cancer in an advanced stage, you might use code C34.81.
- Malignant pleural effusion: The code for this condition can be found in the ICD-10-CM under category J91.8.

2. CPT Codes:
Two thoracentesis procedures were performed - first, an aspiration via thoracentesis, and later, a repeat thoracentesis. The appropriate CPT codes for these procedures would be:
- Aspiration via thoracentesis: The CPT code for this procedure is 32421.
- Repeat thoracentesis: If the second procedure is considered a repeat thoracentesis, you would use CPT code 32422. However, if it is performed for a different reason or by a different method, a different CPT code may be appropriate.

These codes are provided as examples, and it's important to consult the current versions of the ICD-10-CM and CPT code books or online resources for the most accurate and up-to-date codes specific to the patient's condition. Additionally, it's always recommended to follow any applicable coding guidelines and instructions provided by the medical coding authorities or healthcare organization.