M54.42 Lumbago with sciatica, left side
ICD-10-CM · CMS code reference
M54.42 is low back pain (lumbago) with sciatica, pain along the sciatic nerve, on the left side. If only the sciatica is documented, without low back pain, use M54.32 instead.
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Excludes1
Not coded together with this code. The exception is when the two conditions are unrelated to each other.
- intervertebral disc degeneration, lumbar region with discogenic back pain and lower extremity pain (M51.362)
- intervertebral disc degeneration, lumbosacral region with discogenic back pain and lower extremity pain (M51.372)
- lumbago with sciatica due to intervertebral disc disorder (M51.1-)
- psychogenic dorsalgia (F45.41)
- current injury - see injury of spine by body region
- discitis NOS (M46.4-)
Related codes
M54.31Sciatica, right side ICD-10-CMM54.32Sciatica, left side ICD-10-CMM54.40Lumbago with sciatica, unspecified side ICD-10-CMM54.41Lumbago with sciatica, right side ICD-10-CMM54.50Low back pain, unspecified ICD-10-CMM54.51Vertebrogenic low back pain ICD-10-CMM54.59Other low back pain ICD-10-CMM54.6Pain in thoracic spine ICD-10-CM
Common questions
Is M54.42 a billable code?
Yes. M54.42 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.