M51.1 vs M54.3
M51.1 and M54.3 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on M51.1
sciatica NOS (M54.3)
M51.1
Thoracic, thoracolumbar and lumbosacral intervertebral disc disorders with radiculopathy
Not billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M50-M54
Use when the record says
- Sciatica due to intervertebral disc disorder
M54.3
Sciatica
Not billable
- Chapter 13
- Diseases of the musculoskeletal system and connective tissue
- Section
- M50-M54
Indexed under
- Sciatica (infective)
- Sciatica › wallet (infective)
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027