ICD-10 Code S14.118S: Complete lesion at C8, sequela

Key takeaways

ICD-10 Code S14.118S covers a complete lesion at the C8 level of the cervical spinal cord, coded as a sequela encounter.

The 7th character S is what makes the code billable. The parent code S14.118 cannot be submitted without it.

Use S14.118S when the visit treats a late effect, and S14.118D while the injury is still healing.

Code the residual condition first and list S14.118S second, so the claim shows what is being treated and why.

Practice management software like Pabau submits ICD-10 coded claims electronically through its Claim.MD integration.

S14.118S: definition and billable status

ICD-10 Code S14.118S is a billable ICD-10-CM diagnosis code for a complete lesion at the C8 level of the cervical spinal cord, sequela. The code has been in the classification since October 1, 2015, when ICD-10-CM took effect for FY2016.

Use it when the encounter treats a condition that is a late effect of an earlier cervical cord injury. The code sits in category S14, which covers injuries to the nerves and spinal cord at the neck level. It is specific to complete lesions, rather than incomplete ones, at the C8 spinal cord level.

The trailing S marks a sequela encounter. Without that 7th character, the parent code S14.118 is non-billable, so medical billing teams see it rejected at the payer’s first edit.

What does S14.118S mean?

S14.118S means a complete cervical cord lesion at C8 that is now being treated as a late effect. Each character of the code carries part of that meaning.

• S14 – Category for injuries to the nerves and spinal cord at the neck level
• .1 – Subcategory for injury to the cervical spinal cord itself, rather than the nerve roots
• .11 – Complete lesion of the cervical spinal cord
• 8 – The C8 spinal cord level, the lowest of the eight cervical cord segments
• S – 7th character for a sequela encounter, meaning a late effect of a prior injury

The International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM) is maintained by the Centers for Medicare and Medicaid Services (CMS). It requires coders to pick a 7th character that reflects the encounter, not the original injury. S14.118S is only correct when the visit treats a direct consequence of a previous C8 cord injury.

Understanding the 7th character: A, D, and S

Confusing D (subsequent encounter) with S (sequela) is one of the most common errors in spinal cord injury coding. The phase of the patient’s care decides which one applies.

Fracture codes carry a longer set of 7th characters, as S52.042Q shows for a malunion. Cord injury codes in category S14 use only A, D, and S.

The ICD-10-CM Official Guidelines for Coding and Reporting also set the sequencing. The sequela code goes after the code for the residual condition being treated.

Say a patient presents with neurogenic bladder that developed after a complete C8 cord injury. The neurogenic bladder code is listed first. S14.118S follows as a secondary diagnosis, identifying the injury that caused it.

Clinical description: complete lesion at C8

A complete lesion at the C8 spinal cord level means total disruption of motor and sensory pathways through the cord at that point. There is no eighth cervical vertebra. C8 names a cord segment, and its nerve root exits between the C7 and T1 vertebrae.

Functional consequences of a complete C8 spinal cord injury (SCI) typically include:

• Preserved hand and finger function (C8 innervates the finger flexors and intrinsic hand muscles, though strength varies)
• Loss of trunk and lower limb motor control (tetraplegia, also called quadriplegia, rather than paraplegia)
• Impaired sensation below the C8 dermatome, which covers the little finger and medial forearm
• Autonomic dysfunction including neurogenic bowel and bladder
• Risk of autonomic dysreflexia, which follows cervical and high-thoracic injuries

The complete or incomplete distinction matters for coding. A complete lesion, coded under S14.11x, is ASIA A on the American Spinal Injury Association Impairment Scale. No motor or sensory function is preserved in the sacral segments S4 and S5.

Incomplete lesions run from S14.12x to S14.15x, depending on the syndrome the record names.

When to use S14.118S

A sequela encounter happens when the visit treats a condition caused by a prior injury. The original injury is no longer in an active healing phase, so what remains is the secondary condition it left behind. The chart below maps each phase of care to its code.

Use S14.118S when all of the following apply:

1. The patient has a documented history of a complete cervical spinal cord injury at C8
2. The original injury is no longer being actively treated
3. The current visit is for a condition that injury caused, such as neurogenic bladder, spasticity, pressure injuries, or chronic pain
4. Clinical documentation explicitly links the current condition to the original C8 cord injury

Do not use S14.118S while the patient is still in active rehabilitation for the original injury. Active rehab stays under S14.118D until the injury is medically stable and the focus shifts to residual conditions. That boundary is where revenue cycle management teams in rehabilitation facilities lose the most time to rework.

Documentation requirements for S14.118S

Missing a single documentation element is enough to trigger a denial for S14.118S. Payers audit sequela claims closely, because the 7th character S has to be backed by evidence that the encounter treats a late effect.

The medical record must contain all of the following to support S14.118S:

• Original injury documentation: a clear record of the prior traumatic cervical cord injury at C8. Include the date of injury, and imaging that confirms the level and completeness
• ASIA classification: documentation identifying the lesion as complete (ASIA A) at C8, which separates it from an incomplete lesion
• Causal linkage: an explicit clinician note tying the presenting condition to the prior C8 injury, such as neurogenic bladder secondary to a complete C8 SCI
• Active condition being treated: the residual condition is the reason for the visit and is coded first on the claim
• Encounter type justification: evidence that the original injury is no longer in an active treatment phase

Solid documentation also supports medical billing compliance audits and lowers the risk of a retrospective recoupment request from Medicare or a commercial payer. The CDC ICD-10-CM tool carries the official tabular list and index, so you can check the record against the code’s own descriptors.

A record that names the residual condition and its cause is also what gets the claim through scrubbing on the first attempt. That is the difference between clean claims and a queue of rework.

Related codes for cervical cord injuries

S14.118S belongs to a structured family of cervical spinal cord injury codes. Knowing the parent and sibling codes helps you pick the right level of specificity.

Parent and child codes

Neighboring codes turn up in the same records. S12.131D covers a cervical vertebral injury still under active care, and S60.152S puts the same sequela character on a far smaller injury.

Billing and claims considerations

Sequela codes carry billing rules that differ from initial and subsequent encounter codes. Getting them right protects revenue and cuts audit exposure.

Present on admission (POA) status

S14.118S is exempt from POA reporting requirements. Under CMS POA reporting guidelines, sequela codes are assigned a POA indicator of exempt. Facilities do not have to determine whether the condition was present on admission. A sequela is a consequence of an earlier injury, not a newly acquired condition.

On inpatient hospital claims, failing to apply the exemption correctly can trigger an edit at the payer. The AAPC code lookup lists POA exempt status on each code page. When a claim does come back, denial management is where a billing team recovers the money.

Common billing pitfalls

• Using S14.118S for an active rehab encounter: if the patient is still in inpatient rehabilitation for the original injury, the encounter is S14.118D
• Sequencing the injury code first: the residual condition, such as neurogenic bladder or spastic tetraplegia, is the first-listed diagnosis, and S14.118S follows it
• Omitting the causal link: with no statement tying the current condition to the prior C8 injury, S14.118S has no clinical support. Auditors query it
• Using the parent code: S14.118 without a 7th character is not billable and will be rejected by payer claim edits

Practices submitting S14.118S claims electronically can route them through the Claim.MD integration, the US clearinghouse Pabau submits through. Claim.MD validates codes against payer rules before submission, so a truncated or invalid code gets flagged before it reaches the payer.

Rejections still happen, and the remittance tells you why. Reading the reason codes against a list of common denial codes is faster than resubmitting blind.

How Pabau supports sequela coding and claim submission

In most rehabilitation practices the coder reads the note in the chart, then retypes the diagnosis into a separate billing tool. Each retype is another chance to drop the 7th character or reverse the sequencing.

Pabau keeps the record and the claim in one system. The codes attached to the visit carry into the claim without re-entry, and claims management software tracks what the payer sends back.

Pabau does not decide the code for you. It moves what your clinician documented to the payer without a second transcription, which is where most sequela errors start.

Long-term C8 caseloads mostly sit with physical therapy and occupational therapy teams, who bill the same sequela code month after month. One record per patient keeps the causal link in front of whoever codes the visit.

Manage ICD-10 coding and claims in one place

Pabau submits, tracks, and reconciles ICD-10 coded claims through the Claim.MD clearinghouse, so your team never switches systems mid-claim. Sequela codes travel with the record, and remittances land back against the same patient.

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Conclusion

The judgment call on S14.118S is about timing. Once the cord injury itself is stable, the visit stops being injury care and starts being management of what the injury left behind. The 7th character has to follow that shift.

Coders tend to err in one direction. They hold on to D long after active treatment ended, because the patient is still in therapy. Therapy aimed at a residual condition is sequela care, even when it looks identical to rehab.

So write the causal link into the note while the patient is still in front of you. That one sentence is what survives an audit two years later. Book a demo to see how Pabau keeps sequela coding and claim submission in one place.

Continue your research

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Need the neurological findings on paper? Deep tendon reflex exam gives you a form for grading reflexes alongside the ASIA classification.

Coding the acute end of the same injury? Primary trauma survey walks through the assessment that produces the first record of a cord injury.

Wondering how the initial encounter character works? S46.921A shows the A character applied to a first active treatment visit.

Meeting a 7th character outside A, D, and S? S72.345C uses the open fracture characters that only fracture codes carry.

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