S24.4XXA: Injury of thoracic sympathetic nervous system, initial encounter

S24.4XXA, injury of thoracic sympathetic nervous system, initial encounter, is listed as a covered diagnosis in 6 Medicare billing and coding articles that apply to 3 HCPCS Level II codes, including G0283 (Electrical stimulation (unattended), to one or more areas…), G0255 (Current perception threshold/sensory nerve conduction…), G0282 (Electrical stimulation, (unattended), to one or more…). The articles come from 5 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.

HCPCS Level II codes with S24.4XXA as a covered diagnosis

CodeDescriptionMedicare coverageDMEPOS fee 2026 (state range)Articles listing it
G0283Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of careCarrier judgment—1
G0255Current perception threshold/sensory nerve conduction test, (snct) per limb, any nerveNon-covered by MedicareNot covered5
G0282Electrical stimulation, (unattended), to one or more areas, for wound care other than described in g0281Non-covered by MedicareNot covered1

Medicare policy articles listing S24.4XXA

A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.

Other S24 diagnoses (Injury of nerves and spinal cord at thorax level)

Frequently asked questions

Does Medicare cover S24.4XXA (Injury of thoracic sympathetic nervous system, initial…)?

Medicare covers items and services, not diagnoses. 6 Medicare billing and coding articles list S24.4XXA as a covered diagnosis for 3 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.

Which HCPCS codes can be billed with ICD-10 S24.4XXA?

The Level II codes from the policies most specific to this diagnosis are G0283 (Electrical stimulation (unattended), to one or more areas…, 1 article); G0255 (Current perception threshold/sensory nerve conduction…, 5 articles); G0282 (Electrical stimulation, (unattended), to one or more…, 1 article). Code choice depends on the item supplied; check each code's descriptor.

Which Medicare policy articles list S24.4XXA?

A56034 (Billing and Coding: Nerve Blockade for Treatment of Chronic Pain and Neuropathy); A57307 (Billing and Coding: Nerve Conduction Studies and Electromyography); A57478 (Billing and Coding: Nerve Conduction Studies and Electromyography), and 3 more articles.

What is ICD-10-CM code S24.4XXA?

S24.4XXA is the ICD-10-CM code for injury of thoracic sympathetic nervous system, initial encounter, in category S24 (Injury of nerves and spinal cord at thorax level), chapter 19: Injury, poisoning and other consequences of external causes.

Next steps

Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.

Chapter 19: Injury, poisoning and other consequences of external causes · All diagnoses · HCPCS lookup