I am in Oklahoma and 724.2 is a covered diagnosis for a trigger point in the lumbar spine. There are only a handful of covered diagnoses but another one I use is 729.1 myalgia and myositis, unspecified. Neck pain 723.1 is usually covered. I have one doctor who insists on using the 728.85 for muscle spasm and Medicare will not cover that dx. 724.1, thoracic pain is generally covered. Here is a good list but keep in mind that every payable code is carrier specific. I worked in pain management for a long time and we actually got reimbursed using the 338 series for chronic pain. Good luck to you!
729.1 Myalgia and myositis, unspecified
720.1 Spinal enthesopathy
724.2 Lumbago
728.85 Spasm of muscle
723.1 Cervicalgia
724.5 Backache, unspecified
723.9 Unspecified musculoskeletal disorders and symptoms...
726.5 Enthesopathy of hip region
719.41 Pain in joint; shoulder region
724.4 Thoracic or lumbosacral neuritis or radiculitis, u...
726.19 Rotator cuff syndrome of shoulder and allied disor...
726.90 Enthesopathy of unspecified site
727.03 Trigger finger (acquired)
729.5 Pain in limb
722.52 Degeneration of thoracic or lumbar intervertebral ...
726.10 Disorders of bursae and tendons in shoulder region
724.3 Sciatica
719.45 Pain in joint; pelvic region and thigh
729.0 Rheumatism, unspecified and fibrositis
729.2 Neuralgia, neuritis, and radiculitis, unspecified
721.3 Lumbosacral spondylosis without myelopathy
724.1 Pain in thoracic spine
720.2 Sacroiliitis, not elsewhere classified
847.0 Sprains and strains of other and unspecified parts...
719.46 Pain in joint; lower leg
724.02 Spinal stenosis, lumbar region