Hereditary vitamin D-dependent rickets (type 1) (type 2)

This code represents hereditary forms of vitamin D-dependent rickets, which are genetic disorders characterized by impaired vitamin D metabolism or action, leading to defective bone mineralization. These conditions result in skeletal deformities, muscle weakness, and hypocalcemia, despite adequate dietary vitamin D intake.

Use this code for patients diagnosed with either Type 1 or Type 2 hereditary vitamin D-dependent rickets. Documentation should clearly specify the genetic origin of the rickets and differentiate it from nutritional vitamin D deficiency or other forms of rickets. This code is appropriate when genetic testing or clinical presentation confirms one of these specific hereditary types.

• Differentiate carefully from nutritional vitamin D deficiency (E55.0) or other specified rickets (E55.9).
• Ensure documentation specifies "hereditary" and ideally the type (1 or 2) to support this specific code.
• Do not use for acquired forms of rickets or osteomalacia due to other causes.