CPT coding for debridement

1.A patient presents to a physician's office for debridement of 13% of eczematous skin. The debridement was performed by the physician. What are the correct CPT code(s)

2.A patient presents to a wound clinic for debridement of infected skin (5% of body surface or 15 sq. cm.). The wound was cleansed and irrigated by the wound care nurse. Following irrigation, a scalpel was used by the wound care nurse to perform the debridement. What are the correct CPT code(s)?

3.The best definition of debridement is:

4. A patient presents for debridement of an open fracture of the elbow. The physician must debride down to and through the muscle. What are the appropriate code(s) to report for the physician's service?