ICD code T87.34 – Left lower limb stump neuroma

Key takeaways

T87.34 is the billable ICD-10-CM code for neuroma of amputation stump, left lower extremity.

It codes a painful nerve-end mass at a left leg, foot or toe stump, not tissue death or infection.

Stump necrosis on the left leg is T87.54, and stump infection is T87.44.

Phantom limb pain is coded to G54.6, so the provider must document a neuroma at the stump.

Add a Z89 code, such as Z89.512 for a left below-knee amputation, to show the amputation level.

ICD-10 code T87.34: Definition and billable status

ICD-10 code T87.34 is the billable diagnosis code for neuroma of amputation stump, left lower extremity. It sits in Chapter 19 of ICD-10-CM under category T87, complications peculiar to reattachment and amputation. It has been valid since October 1, 2015, and it remains valid in the FY2026 code set published in the CMS ICD-10-CM code files.

The code describes a painful nerve-end mass at a left leg, foot or toe amputation site. It doesn’t describe necrosis, infection or phantom limb pain, which each have their own codes.

What T87.34 means clinically: A painful nerve-end mass at the left leg stump

A neuroma of the amputation stump is a disorganized mass of nerve fibers at the cut end of a nerve. After amputation, the severed fibers try to regrow but have no distal nerve to reach. They form a tangled, sensitive nodule near the end of the residual limb.

T87.34 applies when that neuroma sits on the left lower extremity. That covers a left toe, foot, ankle, below-knee, knee or above-knee amputation site. The original amputation can be traumatic, surgical or disease-related.

What the exam note usually shows

• Localized stump pain: Sharp, burning or electric pain at the left residual limb, often worse with prosthetic socket contact.
• Tinel’s sign: Pain or tingling when the clinician taps over the neuroma.
• Palpable mass: A tender nodule on examination, distinct from general stump swelling.
• Prosthetic intolerance: Trouble wearing the socket because pressure lands on the nodule.

The T87.3 family: Side and limb decide the code

T87.3 is a non-billable header with five billable codes beneath it. A claim submitted at T87.3 is rejected, so the code has to name the extremity. T87.34 is the right one when the record places the neuroma on the left leg, foot or toe.

T87.33 and T87.34 are easy to swap on a busy coding queue. Check the side in the operative report or exam note before you assign either code. The ICD-10-CM Official Guidelines let you take laterality from another clinician’s note, such as a therapy entry. The neuroma diagnosis itself still has to come from the provider.

T87.34 vs other left lower extremity stump complications

T87.34 is often confused with the other T87 complication codes for the same stump. Each describes a different problem, and the provider’s wording decides which one applies. A note describing dead or blackened stump tissue points to T87.54, not to a neuroma code.

A patient can have more than one of these at once. Code each condition the provider documents separately, and query the provider when a note says only “stump pain.” The path below runs the two checks in order, condition first and side second.

Stump neuroma vs phantom limb pain (G54.6): The exam settles it

Stump neuroma pain sits in the residual limb, while phantom limb pain is felt in the part that is gone. Notes often blur the two, yet they need different codes and often different treatment.

Both codes can appear on one claim when the provider documents both conditions. Stump pain alone supports neither, so a clinical documentation query is the next step.

Z89 codes show the left amputation level

T87.34 names the complication, and a Z89 code names the missing part of the limb. Adding the Z89 code shows the payer the level of the left-side amputation. These left-side codes come up most often with T87.34:

Sequencing follows the reason for the visit. When the patient comes in to treat the neuroma, list T87.34 first and the Z89 code after it. When the neuroma is a secondary issue, list it after the main reason for the visit.

Documentation that supports T87.34 on a claim

A payer reviewing a T87.34 claim looks for these elements in the record. Having them in place before billing is what makes a clean claim possible.

• A named neuroma: The provider writes “neuroma” at the amputation stump. “Stump pain” or “residual limb pain” alone doesn’t support T87.34.
• Left-side laterality: A note places the amputation and the neuroma on the left lower extremity.
• Amputation history: The record confirms a prior left toe, foot or leg amputation, with a matching Z89 code.
• Exam findings: A positive Tinel’s sign or a palpable nodule gives the strongest clinical support.
• Failed conservative care: For excision or revision, payers usually expect records of nerve blocks, socket changes or therapy first.

CPT codes that pair with T87.34 depend on the treatment

The procedure code follows the treatment the provider chose. Check every descriptor against the current CPT manual, because annual revisions change procedure definitions.

Targeted muscle reinnervation (TMR) reroutes cut nerves into nearby motor nerves, and it is an established option for painful stump neuromas. It has no dedicated CPT code, so some claims go out as 64999, the unlisted nervous system procedure. Expect a prior authorization request and an operative report on those claims.

Nerve blocks are usually the first treatment, and the guide to CPT code 64450 covers how to bill them. Revision codes carry a 90-day global period, so check modifier rules when the original surgeon operates again.

Payer requirements for T87.34 claims

No national coverage policy is written for T87.34 itself. Coverage for nerve blocks, neuroma excision and stump revision comes from your Medicare Administrative Contractor’s local coverage determinations. Search the Medicare Coverage Database for your jurisdiction before you schedule a procedure.

• Medicare: The LCD sets the medical necessity rules. Give the patient an Advance Beneficiary Notice when coverage is uncertain.
• Workers’ compensation: Traumatic amputation cases need documentation tying the neuroma to the work injury.
• Veterans Affairs: Many patients with stump neuromas are veterans. Confirm whether the visit is VA-funded or billed to another payer.
• Commercial payers: Most require prior authorization for excision, TMR or stump revision. Confirm it for each CPT code before surgery.

Why T87.34 claims come back, and how to fix them

T87.34 claims tend to come back for a small set of reasons. Denial management workflows that track them help you spot a pattern early.

Before you edit a returned claim, decode the denial code on the remittance advice. A missing-information denial needs data added, while a medical necessity denial needs clinical evidence.

How Pabau keeps T87.34 claims consistent from note to payer

On a stump neuroma claim, the details sit in different places. The surgeon documents the neuroma, therapy may record the side, and someone retypes both onto the claim form.

Pabau’s billing tools open each claim pre-filled from the invoice that checkout already raised. Its claims management software checks for missing or invalid details before the claim leaves the system. US claims go out as CMS-1500 forms through our Claim.MD integration.

Your coder still chooses the code. What changes is the handoff, so T87.34 and its Z89 code reach the payer without retyping. Eligibility checks run before the visit, and a dashboard tracks each claim from pending to paid.

Send complete stump neuroma claims the first time

Pabau pre-fills claims from the invoice and checks for missing or invalid details before submission. US claims go through Claim.MD, with eligibility checks and claim tracking included.

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Conclusion

T87.34 is a narrow code, and that narrowness is what protects the claim. Assign it only when the provider names a neuroma at a left lower extremity stump. Send necrosis to T87.54, infection to T87.44 and phantom pain to G54.6.

Add the left-side Z89 code every time, and query the provider whenever a note says only “stump pain.” A short query costs less than a recoded claim or an audit finding.

Book a demo to see how Pabau carries the diagnosis and Z89 status from the record onto a clean claim.

Continue your research

Need to understand how claim denials are managed? Denial management in healthcare covers the workflow for tracking, appealing and preventing rejected claims.

Submitting stump neuroma claims with T87.34? Clean claim submission principles outlines the documentation and formatting standards that reduce first-pass rejections.

Want to understand the clearinghouse role in ICD-10 billing? How medical claims clearinghouses work explains how claims move from practice to payer.

Frequently asked questions