Final answer:
The CPT code for an open repair of a ruptured Achilles' tendon is likely 27650, and the ICD-10-CM code for a left Achilles' tendon rupture is S86.012A.
Step-by-step explanation:
The student is asking for the CPT (Current Procedural Terminology) and ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) codes for a surgical procedure of an open repair of a ruptured Achilles' tendon. For this scenario, the correct CPT code for the open repair of the Achilles' tendon is likely 27650 (Repair, primary, open or percutaneous, ruptured Achilles tendon). As for the diagnosis code, the appropriate ICD-10-CM code reflecting a left Achilles' tendon rupture is S86.012A (strain of left Achilles tendon, initial encounter). It's important that professionals who assign these codes check the latest coding manuals or online resources as codes can be updated.