CPT (Current Procedural Terminology) codes specific to rheumatology don’t exist as rheumatology is a medical specialty, not a procedure. However, rheumatologists commonly use certain CPT codes to bill for services. For example, code 99203 is used for a new patient’s office visit, while 99213 is for established patients. Procedure-specific codes such as 20610 or 76942 are used for joint injections & needle placements. Always check with your physician or insurance for specific codes related to your treatment.