ICD code T87.31 – Right upper limb stump neuroma

Key takeaways

T87.31 is the billable code for neuroma of a right upper extremity amputation stump. Neither the parent T87.3 nor the unspecified T87.30 replaces it when laterality is documented.

T87.31 is a complication-of-amputation code with no 7th character, not a sequela code. List it first when the neuroma is the focus of the encounter.

Phantom limb pain is coded to G54.6, not T87.31. The two conditions present differently, and payers reject a claim that conflates them.

Pabau’s claims management software scrubs claims for missing or invalid details before submission through Claim.MD.

ICD-10 code T87.31: Quick-reference code summary

ICD-10 code T87.31 is the billable ICD-10-CM code for neuroma of amputation stump, right upper extremity.

It describes a painful nerve overgrowth at the cut end of a nerve after an arm or hand amputation. The code is valid for HIPAA-covered transactions in the current fiscal year, and the table below lists the fields coders check before submitting a claim.

What T87.31 covers: Clinical definition

A neuroma of the amputation stump is a non-neoplastic nerve overgrowth that forms when a severed peripheral nerve tries to regenerate after amputation. In the right upper extremity, it typically involves the median, ulnar, or radial nerve at the residual limb. The result is a firm, tender nodule that hurts sharply or burns on palpation, and often during prosthetic use.

Clinically, T87.31 applies when stump pain comes from a demonstrable neuroma rather than from infection, wound dehiscence, or phantom sensation. That distinction drives both code selection and payer review. A tender nodule at the stump end, reproducible with direct palpation, is the core documentation anchor for this code.

• Typical presentation: Localized burning or sharp pain at the right upper extremity stump, worsened by prosthetic socket pressure or direct touch
• Examination finding: Palpable tender nodule at or near the amputation site on the right arm or hand
• Imaging support: Ultrasound or MRI may show a fusiform nerve enlargement at the stump (not required for coding, but it strengthens medical necessity documentation)
• EMG/NCS context: Electrodiagnostic studies can support the neurogenic source of pain when the presentation is atypical

Code hierarchy: Where T87.31 sits in the T87.3 series

The parent code T87.3 is not billable. ICD-10-CM requires one of five child codes, each naming the condition (neuroma) and the affected limb with its laterality. Select the child code that matches the patient’s documented amputation site.

Note that T87.33 covers the right lower extremity. Coders who scan the list and stop at “right” often pick it by mistake. Always confirm the limb type (upper vs. lower) against the clinical documentation before finalizing the code.

T87.31 vs phantom limb pain (G54.6): How to tell them apart

Phantom limb pain is coded to G54.6, not T87.31, and the two codes are not interchangeable for the same symptom. The clinical distinction hinges on where the pain is perceived. Neuroma pain is localized to the physical stump and reproducible by palpating a specific point. Phantom pain is felt in the missing limb itself, with no palpable stump trigger.

A patient can have both conditions at once. In that case, report both T87.31 and G54.6, and sequence each according to the focus of the encounter.

Adjacent stump complication codes: Differentiating T87.31 from T87.41, T87.81, and T87.9

T87.31 is one of several distinct complication codes within category T87. Picking the wrong sibling is a documentation accuracy issue that payers flag during clinical review. The exam finding in the note decides which code applies, as the decision path below shows.

The table below sets out the codes most often confused with T87.31 and the clinical trigger for each.

How to sequence T87.31

T87.31 is a complication-of-amputation code. It has no 7th character, and ICD-10-CM does not treat it as a sequela (late-effect) code. Report it as the principal or first-listed diagnosis when the neuroma is the focus of care. Sequencing on complication codes like this one is a routine check in medical billing compliance audits.

Follow this sequence for T87.31 encounters:

1. Identify the encounter focus. If the visit is to evaluate or treat the stump neuroma, T87.31 is the principal or first-listed diagnosis.
2. Don’t list the original injury code first. A traumatic amputation code (e.g., S68.x for the wrist or hand) describes the original injury, not the neuroma. Follow payer policy on whether to report it at all.
3. Consider a Z89 status code. The relevant Z89.x code (acquired absence of limb) is commonly added to show amputation level, per payer policy. Match it to the documented level (e.g., Z89.211 for acquired absence of right upper limb below elbow).
4. Add Z47.81 if the encounter is for aftercare. For encounters specifically coded as aftercare following surgical amputation, Z47.81 may be reported alongside T87.31 per payer policy.
5. Link T87.31 to the neurectomy CPT code on the claim. For encounters involving neuroma excision, point the procedure line to T87.31 as its diagnosis.

Paired CPT codes for neuroma excision with T87.31

When a neuroma is excised, T87.31 is paired with a CPT code for the neurectomy. The choice depends on which nerve is involved. 64782 covers a hand nerve other than a digital nerve, and 64783 adds each further hand nerve. 64784 covers a major peripheral nerve. Always check the current-year CPT book for editorial revisions before billing.

Append the RT (right side) modifier to the CPT code so it matches the laterality of T87.31. Payers audit CPT-to-ICD-10 linkage for laterality, and an LT modifier on a T87.31 claim is an immediate mismatch.

Z codes and secondary diagnoses that often accompany T87.31

Z89 status codes give payers the amputation history behind the claim. They are commonly added to show amputation level, per payer policy. When you add one, match it to the level documented in the clinical record.

• Z89.20: Acquired absence of upper limb, unspecified level. Use it only when the exact amputation level is not documented.
• Z89.211: Acquired absence of right upper limb below elbow. It fits below-elbow amputations with T87.31.
• Z89.221: Acquired absence of right upper limb above elbow. It fits above-elbow or transhumeral amputations.
• Z89.231: Acquired absence of right shoulder. It fits shoulder disarticulations with a right upper limb neuroma.
• Z47.81: Encounter for orthopedic aftercare following surgical amputation. Add it when the visit is specifically for aftercare and the payer requires this secondary code.

Payer documentation requirements for T87.31 claims

Medicare and most commercial payers require clinical documentation that supports medical necessity before approving T87.31 claims. That matters most when the claim includes a neuroma excision. Thin documentation is a common trigger for clinical review requests on this code, and sound medical billing documentation practices keep those requests to a minimum.

Payers commonly require the following elements, though specific requirements vary by payer and plan:

• Clinical examination findings: Where the tender nodule sits relative to the amputation level (e.g., “2 cm proximal to the right below-elbow stump end”). Record its size and whether direct palpation reproduces the pain
• Symptom duration: How long the neuroma symptoms have been present, establishing chronicity rather than an acute post-operative complication
• Functional impact: How the neuroma affects prosthetic use, daily activity, or work, which anchors medical necessity for surgery
• Conservative treatment attempted: Prior conservative management (desensitization, steroid injection, nerve block, prosthetic socket modification) before surgical referral
• Imaging or electrodiagnostic support: Ultrasound or MRI findings confirming nerve enlargement strengthen the record, though not every payer mandates them
• Laterality clearly documented: The note must state “right upper extremity” explicitly, because ambiguous laterality in the source record often leads to T87.30 (unspecified) miscoding

Common claim denial reasons for T87.31 and how to avoid them

Most T87.31 denials trace back to laterality errors or thin documentation. Both are avoidable with a structured pre-submission review. Solid denial management workflows catch most of them before the claim leaves the practice.

ICD-9-CM crosswalk for T87.31

The ICD-9-CM to ICD-10-CM mapping for T87.31 is a one-to-many crosswalk, because ICD-9 did not carry the same laterality specificity. Practices using legacy systems for prior authorization lookups should treat any ICD-9 crosswalk as approximate. Verify coverage under the current ICD-10-CM code with the payer directly.

According to the CMS General Equivalence Mappings (GEMs), T87.30–T87.34 map from ICD-9-CM 997.61 (Neuroma of amputation stump), a one-to-many split by limb and laterality. Use this crosswalk for historical research only, not for current claim submission.

How Pabau’s claims software keeps T87.31 claims clean

A laterality-specific code like T87.31 leaves little room for error on the claim. The standard for submitting a clean claim on stump neuroma encounters starts with correct ICD-10 specificity and a matching CPT laterality modifier. Where the payer expects one, it also includes a Z89 status code.

Pabau, the practice management platform we build, handles that work in its claims management software. Pabau scrubs each claim for missing or invalid details before submission, and sends it through Claim.MD. Through that integration, CMS-1500 claims reach thousands of US payers, and eligibility checks run before the visit.

Claim.MD also returns electronic remittance advice on each claim. When a T87.31 claim is denied, the CARC denial codes show whether laterality, medical necessity, or sequencing caused it. Coders can then apply the right fix.

Reduce T87.31 claim denials before they happen

Pabau scrubs each claim for missing or invalid details before submission, and sends it through Claim.MD to thousands of US payers. See how it works for your practice.

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Conclusion

Code T87.31 only when the note documents a tender, palpable neuroma at a right upper extremity stump. If the pain sits in the absent limb, G54.6 is the code, and both can apply in the same visit. A problem-list entry that records amputation level and laterality prevents most rework. No coder then has to dig those details out of the history.

Pabau scrubs each claim for missing or invalid details and sends it through Claim.MD. Incomplete T87.31 claims are caught before a payer sees them. Book a demo to see how Pabau handles claims for amputation stump coding in your practice.

Continue your research

Want to see how clearinghouse submission works end to end? Pabau’s Claim.MD clearinghouse integration explains how claims, eligibility checks, and remittance flow through Claim.MD.

Need guidance on managing denied amputation-related claims? Denial codes in medical billing covers the most common CARC codes and corrective workflows for ICD-10-CM rejections.

Looking for a broader overview of the claims submission process? Revenue cycle management fundamentals outlines how ICD-10 coding fits into the end-to-end claim-to-payment workflow.

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