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G54.3 ICD-10-CA code: Thoracic root disorders, not elsewhere classified

G54.3 is the ICD-10-CA code for “Thoracic root disorders, not elsewhere classified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

G54.3

Thoracic root disorders, not elsewhere classified

Short description: Thoracic root disorders NEC

ICD-10-CA · Canada · Also written G543

Index terms

Entries in CIHI’s alphabetical index that lead to G54.3. Searching the index by the condition the note names is how coders reach this code.

  • Disorder (of), thoracic root (nerve) NEC
  • Lesion (nontraumatic), thoracic root (nerve) NEC

Notes for G54.3

As CIHI prints them, with any note G54.3 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Current traumatic nerve root and plexus disorders - see nerve injury by body regionintervertebral disc disorders (M50-M51)neuralgia or neuritis NOS (M79.2)neuritis or radiculitis:• brachial NOS (M54.1)• lumbar NOS (M54.1)• lumbosacral NOS (M54.1)• thoracic NOS (M54.1)radiculitis NOS (M54.1)radiculopathy NOS (M54.1)spondylosis (M47.-)From G54 Nerve root and plexus disorders
  • Current traumatic nerve, nerve root and plexus disorders - see nerve injury by body regionneuralgia NOS (M79.2)neuritis NOS (M79.2)peripheral neuritis in pregnancy (O26.8)radiculitis NOS (M54.1)From G50-G59 Nerve, nerve root and plexus disorders
  • Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 6: Diseases of the nervous system (G00-G99)

Where G54.3 sits

  1. 1ChapterChapter 6: Diseases of the nervous system (G00-G99)
  2. 2Block G50-G59Nerve, nerve root and plexus disorders
  3. 3Category G54Nerve root and plexus disorders
  4. 4Valid code G54.3Thoracic root disorders, not elsewhere classified

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See G54.3 in the CIHI source

Frequently asked questions

What does ICD-10-CA code G54.3 mean?

G54.3 is the ICD-10-CA code for “Thoracic root disorders, not elsewhere classified” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is G54.3 in ICD-10-CA?

G54.3 sits under G54 Nerve root and plexus disorders, within G50-G59 Nerve, nerve root and plexus disorders, within Chapter 6: Diseases of the nervous system (G00-G99).

What coding notes apply to G54.3?

ICD-10-CA lists Excludes notes for G54.3, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside G54.3

G54.0Brachial plexus disordersG54.1Lumbosacral plexus disordersG54.2Cervical root disorders, not elsewhere classifiedG54.4Lumbosacral root disorders, not elsewhere classifiedG54.5Neuralgic amyotrophyG54.6Phantom limb syndrome with painG54.7Phantom limb syndrome without painG54.8Other nerve root and plexus disordersG54.9Nerve root and plexus disorder, unspecified