Final answer:
Chapter 12: Diseases of the Skin and Subcutaneous Tissue contains codes for diseases and disorders of the nails as it covers the integumentary system, including the nails.
Step-by-step explanation:
The chapter that contains codes for diseases and disorders of the nails is Chapter 12: Diseases of the Skin and Subcutaneous Tissue. This is because the integumentary system, which encompasses the skin, hair, and nails, is covered in this chapter. Specific sections within this chapter, such as 13.4 in some textbooks, directly address the anatomy and pathology associated with hair and nails. Understanding these conditions is crucial for diagnosing and treating nail-related disorders.