Convert to ICD-10-CM: 
724.6 converts approximately to:
- 2015/16 ICD-10-CM M43.27 Fusion of spine, lumbosacral regionOr: 
- 2015/16 ICD-10-CM M43.28 Fusion of spine, sacral and sacrococcygeal regionOr: 
- 2015/16 ICD-10-CM M53.2X7 Spinal instabilities, lumbosacral regionOr: 
- 2015/16 ICD-10-CM M53.3 Sacrococcygeal disorders, not elsewhere classified
 ICD-9-CM Volume 2 Index entries containing back-references to 
724.6:
- Affection, affections - see also Disease sacroiliac (joint), old 724.6 sacroiliac (joint), old 724.6
 
- Ankylosis (fibrous) (osseous) 718.50  lumbosacral (joint) 724.6 lumbosacral (joint) 724.6
  sacroiliac (joint) 724.6 sacroiliac (joint) 724.6
 
- Backache (postural) 724.5  sacroiliac 724.6 sacroiliac 724.6
 
- Change(s) (of) - see also Removal of joint (see also Derangement, joint) 718.90 joint (see also Derangement, joint) 718.90   sacroiliac 724.6 sacroiliac 724.6
 
  sacroiliac joint 724.6 sacroiliac joint 724.6
 
- Derangement sacroiliac (old) 724.6 sacroiliac (old) 724.6  current - see Dislocation, sacroiliac current - see Dislocation, sacroiliac
 
 
- Destruction joint (see also Derangement, joint) 718.9 joint (see also Derangement, joint) 718.9   sacroiliac 724.6 sacroiliac 724.6
 
 
- Disease, diseased - see also Syndrome lumbosacral region 724.6 lumbosacral region 724.6
  sacroiliac NEC 724.6 sacroiliac NEC 724.6
 
- Dislocation (articulation) (closed) (displacement) (simple) (subluxation) 839.8  recurrent (see also Derangement, joint, recurrent) 718.3 recurrent (see also Derangement, joint, recurrent) 718.3 
  sacroiliac (joint) (ligament) (closed) 839.42 sacroiliac (joint) (ligament) (closed) 839.42 
  spine (articular process) (see also Dislocation, vertebra) (closed) 839.40 spine (articular process) (see also Dislocation, vertebra) (closed) 839.40   atlanto-axial (closed) 839.01 atlanto-axial (closed) 839.01 
  cervical, cervicodorsal, cervicothoracic (closed) (see also Dislocation, vertebrae, cervical) 839.00 cervical, cervicodorsal, cervicothoracic (closed) (see also Dislocation, vertebrae, cervical) 839.00 
  coccyx 839.41 coccyx 839.41 
  congenital 756.19 congenital 756.19 
  due to birth trauma 767.4 due to birth trauma 767.4 
  open 839.50 open 839.50 
  recurrent 724.9 recurrent 724.9 
  sacroiliac 839.42 sacroiliac 839.42 
  sacrum (sacrococcygeal) (sacroiliac) 839.42 sacrum (sacrococcygeal) (sacroiliac) 839.42 
 
 
- Disorder - see also Disease sacroiliac joint NEC 724.6 sacroiliac joint NEC 724.6
  sacrum 724.6 sacrum 724.6
 
- Displacement, displaced sacroiliac (congenital) (joint) 755.69 sacroiliac (congenital) (joint) 755.69   current injury - see Dislocation, sacroiliac current injury - see Dislocation, sacroiliac
  old 724.6 old 724.6
 
 
- Fusion, fused (congenital) lumbosacral (acquired) 724.6 lumbosacral (acquired) 724.6
  sacroiliac (acquired) (joint) 724.6 sacroiliac (acquired) (joint) 724.6
 
- Instability lumbosacral 724.6 lumbosacral 724.6
 
- Lesion(s) sacroiliac (joint) 724.6 sacroiliac (joint) 724.6
 
- Limitation of joint motion (see also Stiffness, joint) 719.5  sacroiliac 724.6 sacroiliac 724.6
 
- Pain(s) (see also Painful) 780.96  sacroiliac 724.6 sacroiliac 724.6
 
- Relaxation lumbosacral joint 724.6 lumbosacral joint 724.6
  sacroiliac (joint) 724.6 sacroiliac (joint) 724.6
 
- Sacralgia 724.6
- Sacrodynia 724.6
- Slipped, slipping sacroiliac joint 724.6 sacroiliac joint 724.6
 
- Spasm, spastic, spasticity (see also condition) 781.0  sacroiliac 724.6 sacroiliac 724.6
 
- Sprain, strain (joint) (ligament) (muscle) (tendon) 848.9  lumbosacral 846.0 lumbosacral 846.0   chronic or old 724.6 chronic or old 724.6
 
  sacroiliac (region) 846.9 sacroiliac (region) 846.9   chronic or old 724.6 chronic or old 724.6
  ligament 846.1 ligament 846.1 
  specified site NEC 846.8 specified site NEC 846.8 
 
 
- Stiffness, joint NEC 719.50  sacroiliac 724.6 sacroiliac 724.6
 
- Syndrome - see also Disease sacroiliac 724.6 sacroiliac 724.6
  Thiele 724.6 Thiele 724.6
 
- Thiele syndrome 724.6
- Unstable lumbosacral joint (congenital) 756.19 lumbosacral joint (congenital) 756.19   acquired 724.6 acquired 724.6
 
  sacroiliac 724.6 sacroiliac 724.6