ICD code S14.144A – Brown-Sequard syndrome at C4

Key takeaways

ICD-10 Code S14.144A reports Brown-Sequard syndrome at the C4 level of the cervical spinal cord, a named incomplete cord injury with its own code.

The 7th character A covers active treatment only. Switch to D for inpatient rehab and follow-up care, and to S for late effects.

The note must name Brown-Sequard syndrome or describe the crossed-deficit pattern at C4. Vague ‘incomplete SCI’ language downcodes to S14.154A.

When a cervical vertebra fracture is also documented, S14.144A is listed first and the S12 fracture code follows it.

Pabau, the practice management platform we build, runs real-time eligibility checks and flags denied claims through its Claim.MD integration.

ICD-10 Code S14.144A: Quick reference

ICD-10 Code S14.144A is the billable ICD-10-CM code for Brown-Sequard syndrome at the C4 level of the cervical spinal cord, initial encounter. It applies while the patient receives active treatment for a hemicord injury at C4.

The code is valid in the FY2027 code set, effective October 1, 2026, per the CMS ICD-10 codes release. The table below confirms its key attributes.

Clinical presentation: Brown-Sequard syndrome at C4

Brown-Sequard syndrome is an incomplete spinal cord injury (SCI) caused by damage to one lateral half of the cord. Typical causes are penetrating trauma, disc herniation, and spinal cord contusion. At C4, it produces a crossed-deficit pattern that sets it apart from every other incomplete SCI syndrome.

The hallmark presentation pairs ipsilateral motor and proprioception loss below the lesion with contralateral loss of pain and temperature sensation. The pattern crosses because the corticospinal tract and dorsal columns stay on the same side until they cross in the brainstem. The spinothalamic tract crosses within one or two segments of where it enters the cord.

At C4, the patient presents with same-side arm and leg weakness. Pain and temperature loss sits on the opposite side, in the chest, arm, and leg below C4.

For rehabilitation planning, the ASIA Impairment Scale (AIS) grade is critical context. Brown-Sequard syndrome most commonly classifies as AIS grade C or D, because some voluntary motor function survives below the injury.

The clinician assigns the AIS grade. The coder selects S14.144A from what the physician documents and never interprets the AIS assessment independently.

Understanding the 7th character ‘A’: Initial encounter

The 7th character in S14.144A signals the episode of care, not the number of times the patient has been seen. The ICD-10-CM Official Guidelines for Coding and Reporting (Section I.C.19) allow three 7th characters for S14.144. Each one has a distinct clinical trigger.

A common error is using 7th character A for rehabilitation. Rehab is not active treatment, so inpatient rehab admissions and outpatient therapy visits take the D character. Using A on those encounters creates a mismatch that Medicare claim reviewers flag.

S14.144A code hierarchy: Parent and child codes

S14.144A sits at the most granular level of the S14 category. Understanding the hierarchy helps coders recognize when a more specific or less specific code applies.

Codes commonly confused with ICD-10 Code S14.144A

Six codes in the S14.1 series are regularly confused with ICD-10 Code S14.144A. In every case, the syndrome pattern and level the provider documents decide the code, not the severity of the injury.

The most consequential downcode error is selecting S14.154A when Brown-Sequard syndrome is documented. S14.154A still reports an incomplete cervical cord injury at C4. It lacks the named-syndrome specificity that payers and quality registries need for rehabilitation authorization and risk stratification.

The three questions below walk the same decision in the order a coder meets it in the note.

Documentation requirements for ICD-10 Code S14.144A

The provider note must contain specific elements for S14.144A to withstand audit. Vague documentation results in a downcode to S14.154A or an outright denial. Meeting clean claim requirements starts with the clinical note, not the claim form.

Required documentation elements for S14.144A:

• Named syndrome or equivalent pattern: The note must state “Brown-Sequard syndrome,” “hemicord syndrome,” or describe ipsilateral motor/proprioception loss with contralateral pain/temperature loss below the lesion. “Incomplete spinal cord injury” alone is insufficient.
• Neurological level documented as C4: The provider must identify C4 as the neurological level of injury. C3 or C5 documentation requires a different code from the S14.14 series.
• Injury classified as incomplete: The record must explicitly characterize the injury as incomplete. Preserved sensation, voluntary motor function, or sacral sparing below the level establishes this, and AIS grade C or D supports it.
• Mechanism of injury: The note should record the acute traumatic cause. Examples are a motor vehicle collision, penetrating trauma, a fall, or disc herniation with cord impingement. It establishes traumatic etiology and supports the external cause code.
• Imaging correlation: MRI or CT findings confirming cord signal change or structural compromise at C4 are not required for code assignment. Most payers still expect them when they process the claim.
• ASIA Impairment Scale assessment: AIS grading is not required for code selection. It is still the strongest evidence when payers ask for proof that the injury is incomplete. Coders never assign AIS grades. They rely on what the clinician documents.

Payer requirements and pre-authorization for S14.144A claims

Medicare and commercial payers treat cervical spinal cord injury claims as high-cost, high-scrutiny submissions. Requirements vary by payer and change each year, so check current Local Coverage Determinations (LCDs) before submitting.

Billers who route claims through dedicated claims software catch payer-rule errors before submission on complex neurological injury codes.

• Imaging documentation: Most payers require MRI (preferred) or CT confirming cord injury at the C4 level. The imaging report should document cord signal abnormality or structural compromise at the documented neurological level.
• ASIA assessment record: For inpatient rehabilitation authorization, payers typically require a completed ASIA classification in the admission assessment. The clinician completes it, not the coder.
• Acute care records: Inpatient S14.144A claims require operative notes or acute care narrative confirming the traumatic event and initial neurological exam consistent with Brown-Sequard findings.
• Pre-authorization for rehabilitation: An inpatient rehabilitation facility (IRF) admission reports S14.144D, because rehab is not active treatment. Medicare Advantage and most commercial plans require prior authorization for it. Medicare fee-for-service rules may differ, so verify current payer policy.
• Real-time eligibility verification: Cervical SCI claims often move between payers, from accident liability or workers’ compensation to commercial coverage or Medicare. Run a real-time eligibility check before each submission to confirm active coverage and the coordination-of-benefits order.

Common claim denial reasons for S14.144A

S14.144A claims deny for predictable, correctable reasons. Denial management workflows that map each denial category to a root cause cut rework time on spinal cord injury claims.

The payer states each reason on the remittance as a claim adjustment reason code. Our guide to claim denial codes explains which code points to which fix.

Official coding guidelines for S14 cervical cord injuries

The ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19, governs injury code sequencing and 7th character application across the S14 category. Several specific instructions apply directly to S14.144A claims. Refer to the CDC/NCHS ICD-10-CM web tool for the current FY tabular list and index.

• Sequencing rule, fracture present: The S12 category carries a “code first” note for any associated cervical cord injury. When a cervical fracture is documented with the cord injury, S14.144A comes first and the S12 code follows. Reversing this order is a common sequencing denial on cervical SCI claims.
• Sequencing rule, cord injury only: With no fracture documented, S14.144A is still the first-listed code. Add codes for secondary conditions, such as neurogenic bladder.
• Code to the highest degree of specificity: The ICD-10-CM guidelines require coding to the highest level of specificity the documentation supports. Selecting S14.154A when Brown-Sequard syndrome is documented violates this rule and may count as a coding quality error on audit.
• External cause codes: The guidelines encourage an external cause code from the V, W, X, or Y chapters to capture the mechanism of injury. It is not required for code validity, but many payers and some state reporting mandates expect it.
• FY2027 status: ICD-10 Code S14.144A is valid and billable in the FY2027 ICD-10-CM release, effective October 1, 2026. Check the AAPC ICD-10-CM code lookup or the CDC tool before each October 1 update for revisions.

A firm grasp of medical billing fundamentals for traumatic injuries, including sequencing priority and encounter type, reduces errors across the full S14 range.

How Pabau keeps S14.144A claims clean from the first submission

Most S14.144A denials start before the claim leaves the practice. A coverage change after the accident goes unnoticed, a rehab visit keeps the A character, or a denied claim sits unworked in a clearinghouse portal.

Pabau connects to the Claim.MD clearinghouse and turns the invoices your team already raises into electronic CMS-1500 claims. Staff run a real-time eligibility check from the patient record. A switch from auto liability to commercial coverage then shows up before the claim goes out.

Claim statuses update from the payer, and electronic remittance advice comes back into Pabau matched to each claim. Denied claims are flagged for rework, so your billing team can fix a wrong 7th character or a missing external cause code and resubmit.

Streamline spinal cord injury claims from day one

Pabau connects to Claim.MD to send ICD-10-coded claims to thousands of US payers, check eligibility in real time, and flag denials for rework. Your billing team catches S14.144A errors before the payer does.

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Conclusion

S14.144A holds on audit when two facts are in the provider’s note: the named Brown-Sequard pattern and C4 as the neurological level. Both are the provider’s to document, and neither is the coder’s to infer.

When either element is missing, query the provider before you submit. That takes minutes, while a denial and appeal can hold up payment for weeks.

Then watch the 7th character as the patient moves on, because the day active treatment ends, the same injury becomes S14.144D. Book a demo to see how Pabau checks eligibility and flags S14.144A denials before they stall your cash flow.

Continue your research

Looking for documentation standards that survive payer audits? Medical billing compliance outlines the documentation and coding practices that reduce audit risk across injury code categories.

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