Coxa magna, right hip

This code describes an abnormally enlarged femoral head and/or acetabulum of the right hip joint. This condition results in an increased articular surface area, which can lead to altered biomechanics and potential degenerative changes. It is often a sequela of childhood hip disorders such as Legg-Calvé-Perthes disease or slipped capital femoral epiphysis.

Use this code when documentation specifies an enlarged femoral head and/or acetabulum affecting the right hip. This diagnosis is typically confirmed by imaging studies such as X-rays, MRI, or CT scans demonstrating the characteristic anatomical changes. Clinical notes should describe the laterality and the finding of coxa magna.

• Ensure laterality (right hip) is clearly documented.
• Distinguish from coxa valga or coxa vara, which describe altered femoral neck-shaft angles rather than overall size.
• Consider coding any underlying or associated conditions, such as osteoarthritis, if documented as a consequence of the coxa magna.