Final answer:
The CPT code for the surgical procedure for a 49-year-old female with chronic deQuervain's disease, as described, is most likely 25000, which covers the incision and release of deQuervain's disease of the wrist.
Step-by-step explanation:
The clinical scenario provided describes a surgical procedure for a patient with chronic deQuervain's disease who has not responded to conservative treatment measures. To report the correct CPT (Current Procedural Terminology) code, we need to identify the procedure's key elements, identify the surgical steps undertaken, and apply the specific coding rules as laid out by the American Medical Association (AMA). In this case, the surgical steps include the administration of a local anesthetic, making a transverse incision over the first dorsal compartment, identification and dissection of the abductor pollicis longus and extensor pollicis brevis tendons, release of the fibrotic tissue, and then closure of the surgical site.
Considering the details of the procedure described, the CPT code that would most likely be reported in this scenario is 25000, which corresponds to the incision and release of deQuervain's disease of the wrist (extensor tendons).