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ICD-10 Code M54.40: Lumbago with sciatica, unspecified side

M54.40 is a billable ICD-10 diagnosis code used to classify Lumbago with sciatica, unspecified side in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the musculoskeletal system and connective tissue (M00-M99).

When is it used?

  • May be used when a clinician documents lumbago with sciatica, unspecified side in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
13Diseases of the musculoskeletal system and connective tissue (M00-M99)
block
M40-M54Dorsopathies
block
M50-M54Other dorsopathies
category
M54Dorsalgia
category
M54.4Lumbago with sciatica
currentM54.4

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Orthopedic SpecialistRheumatologist

Coverage-related procedures and services

CPT 64416high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; BRACHIAL PLEXUS, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64448high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; FEMORAL NERVE, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance
CPT 64449high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; LUMBAR PLEXUS, POSTERIOR APPROACH, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT)
Source: CMS coverage guidance
CPT 64446high
INJECTION(S), ANESTHETIC AGENT(S) AND/OR STEROID; SCIATIC NERVE, CONTINUOUS INFUSION BY CATHETER (INCLUDING CATHETER PLACEMENT), INCLUDING IMAGING GUIDANCE, WHEN PERFORMED
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
M54.40

Common synonyms

Lumbago with sciatica, unspecified sideLumbago with sciatica

Frequently asked questions

Code details

CodeM54.40
SystemICD10
Display nameLumbago with sciatica, unspecified side
ChapterDiseases of the musculoskeletal system and connective tissue (M00-M99)
BlockOther dorsopathies

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code M54.40 for Lumbago with sciatica, unspecified side | HealthAssure