The correct ICD-10-PCS (International Classification of Diseases, Tenth Revision, Procedure Coding System) code for the procedure described, which involves the diagnostic needle aspiration of the right knee joint, would likely be 0SRC0JZ.
Breaking it down:
0SRC: This represents the root operation of "Extraction." It signifies the taking or letting out of solid, gaseous, or liquid material by a variety of methods.
0JZ: This identifies the body part being involved, which is the "Right Knee Joint."
The third character in the code is for the approach, which is not explicitly mentioned in the provided information and would be needed for a more precise code selection.