RADIATING
  724.2 Lumbago

RADICULAR
  724.2 Lumbago
  847 Sprains and strains of other and unspecified parts of back
  847.2 Lumbar

REPETITIVE
  354.0 Carpal tunnel syndrome

REST
  722.1 Displacement of thoracic or lumbar intervertebral disc without myelopathy
  724.2 Lumbago
  847 Sprains and strains of other and unspecified parts of back
  847.2 Lumbar

RUPTURE
  722.1 Displacement of thoracic or lumbar intervertebral disc without myelopathy