ICD code T87.33 – Neuroma of amputation stump

Key takeaways

ICD-10 Code T87.33 is a billable diagnosis code for neuroma of amputation stump, right lower extremity.

Laterality is required. T87.33 covers the right lower extremity only, and left lower extremity neuromas use T87.34.

Documentation must confirm a stump neuroma rather than phantom limb pain, which is coded under G54.6.

The code has been in effect since October 1, 2015 and carries no seventh character.

Practice management software like Pabau supports ICD-10-CM code entry and electronic claim submission through its Claim.MD integration.

ICD-10 Code T87.33: definition and billable status

ICD-10 Code T87.33 is the billable ICD-10-CM code for neuroma of amputation stump, right lower extremity. In short, it applies when a nerve mass forms at the residual limb after a right leg amputation and the pain originates at the stump itself.

This reference covers the code’s clinical definition and its place in the ICD-10-CM hierarchy. It also sets out every T87.3x sibling code, the documentation payers look for, how it differs from phantom limb pain, and the CPT crosswalk. For reference, the tabular list is searchable by code or keyword in the CDC/NCHS official ICD-10-CM web tool.

T87.33 code details at a glance

Here are the billing facts worth checking before the claim goes out. ICD-10 Code T87.33 is fully billable, with no additional characters required.

T87.3 itself is the non-billable parent heading. Only the fifth-character subcodes, T87.30 through T87.39, carry billable status. So, ICD-10 Code T87.33 is one of them and needs no further extension. For the latest edition, the CMS ICD-10 codes page publishes the official tabular list and coding guidelines each October.

Clinical description: neuroma of amputation stump, right lower extremity

A stump neuroma forms when peripheral nerve axons try to regrow after amputation but have no distal target to reach. Instead, they grow into a disorganized mass at the residual limb tip. That mass is a structural complication of the amputation, not a stage of normal healing.

For coding under ICD-10 Code T87.33, the neuroma must sit at the residual limb of the right lower extremity. That includes both below-knee and above-knee amputations. Typically, presentation includes local tenderness at the stump tip, shooting or burning pain on touch, and extra sensitivity to prosthetic socket pressure.

• Mechanism: Disorganized axonal regrowth at the amputation site, forming a fibrous nerve mass
• Location: Residual limb of the right lower extremity, at any amputation level
• Symptoms: Point tenderness over the stump, neuropathic pain, prosthetic intolerance
• Diagnosis: Clinical exam, confirmed by tenderness on touch or ultrasound rather than by reported phantom sensation
• Distinction from phantom limb pain: Phantom pain (G54.6) is felt in the absent limb. By contrast, stump neuroma pain starts at the physical residual limb

This distinction drives code selection. For example, a patient who reports pain in their missing foot is describing phantom limb pain. By contrast, a patient who winces when the clinician presses the stump end is showing signs of a stump neuroma. The two can coexist, and both get coded when both are documented.

Where the code sits in the ICD-10-CM hierarchy

Understanding the hierarchy helps coders find related codes and pick the most specific one. Specifically, ICD-10 Code T87.33 sits in the chapter for injury, poisoning and certain other consequences of external causes. Inside that chapter, a focused block covers reattachment and amputation complications.

The T87 category is reserved for complications specific to reattachment and amputation. So, T87.33 should only appear in records that document a previous amputation or reattachment. For the wider range, coders can explore it in the AAPC Codify ICD-10-CM lookup alongside clinical notes and crosswalk data.

T87.3 neuroma of amputation stump: all subcodes

The T87.3 subcategory covers neuromas at every amputation site, with the fifth character setting the limb and side. So, picking the right subcode needs documentation that names the affected limb. ICD-10 Code T87.33 covers the right lower extremity only, so any other subcode used for that location is a coding error.

When a patient has bilateral lower extremity amputations with neuromas at both stumps, T87.33 and T87.34 may both be coded. Each code stands alone, and no bilateral modifier is needed. Still, T87.30 is a fallback for genuinely undocumented laterality, used only after the operative and clinical records have been reviewed.

Amputation stump complications: the full T87 code group

T87 covers every complication specific to reattachment and amputation. ICD-10 Code T87.33 belongs to the neuroma subgroup, and patients with complex amputation histories often carry more than one T87 complication. Knowing the shape of the whole category is what stops under-coding.

Multiple T87 codes may be given in one encounter when the patient carries more than one complication. For instance, a stump neuroma alongside a stump infection is the common case. ICD-10-CM places no limit on how many T87 codes appear on the same claim.

Documentation requirements for ICD-10 Code T87.33

Claim acceptance for ICD-10 Code T87.33 depends on what the medical record holds. Payers reviewing post-amputation neuroma claims look for a set number of elements. If one is missing, it can open a denial management workup that delays payment by weeks.

• Prior amputation history: The record must show a previous amputation of the right lower extremity. For example, a surgical history note or a prior encounter record satisfies this.
• Laterality confirmation: The note must clearly state right lower extremity, right leg, or right limb. Otherwise, bilateral or unspecified wording defaults the claim to T87.30.
• Clinical findings supporting the neuroma: Point tenderness at the stump tip on touch, or imaging that confirms a nerve mass. Local stump pain apart from phantom sensation also counts. At minimum, the assessment must state stump neuroma or amputation neuroma.
• Distinction from phantom limb pain: If the patient also reports phantom sensations, note them separately. That’s because phantom limb pain belongs to G54.6 and must be recorded apart from the stump finding.
• Findings from this encounter: Each visit needs its own stump exam. Otherwise, carrying a previous note’s neuroma statement forward without a current assessment invites a medical-necessity denial.

The detail in the note has to match the detail the code demands. T87.33 needs right-side, lower-extremity, neuroma-specific wording. Otherwise, generic wording such as amputation complication or stump pain prompts a coding query, or a downcode to T87.30 or T87.9.

Coding guidelines and usage notes

Several ICD-10-CM rules shape how T87.33 is applied. These come from the tabular list and the official NCHS coding guidelines, and they answer the questions coders raise most often about this code.

• No seventh character: T87.33 takes no seventh character. The code is complete at five characters, and adding an extension is a coding error.
• Sequencing when several T87 codes apply: List the complication mainly responsible for the encounter first. A visit booked for neuroma evaluation makes T87.33 the principal diagnosis. But a neuroma noted by chance during wound care for stump infection puts T87.4x first.
• Not a code for phantom limb pain: Phantom limb pain is classified under G54.6, phantom limb syndrome with pain. So, do not use T87.33 when the pain sits in the absent limb rather than at the physical stump.
• Additional codes for pain management: When stump neuroma pain drives a pain management step, code the pain as an added diagnosis. Use the right site-specific pain code and follow the ICD-10-CM sequencing guidelines for pain.
• Recognized by every payer type: Medicare, Medicaid and commercial insurers all accept T87.33 as a standard ICD-10-CM diagnosis code. Medical-necessity policy for the associated treatment procedures still varies, so verify coverage payer by payer.

The pattern holds across the code set. The most detailed code wins, unspecified codes are a last resort, and sequencing follows the reason for the encounter.

T87.33 vs related post-amputation diagnoses

The most common error with ICD-10 Code T87.33 is treating a stump neuroma as phantom limb pain. In fact, they are separate clinical conditions with separate codes, and payers audit for the difference. The table below sets out when each code applies.

A patient with both a stump neuroma and phantom limb pain, which is common, may carry T87.33 and G54.6 in the same encounter. Even so, both conditions have to be documented separately by the treating clinician. The phantom limb codes sit outside T87 and need no sequencing tie to T87.33. The decision path below shows where each one lands.

Associated CPT codes for stump neuroma procedures

ICD-10 Code T87.33 is a diagnosis code, so it pairs with a CPT procedure code to form a complete claim. Which CPT code applies depends on the treatment given. For the wider set, the CPT codes reference lists it in full, and the ones that pair with stump neuroma treatment are below.

Before billing, check each pairing against current AMA CPT guidelines and any local coverage determination that applies. After all, payers set their own rules on which CPT and diagnosis combinations they accept for stump neuroma treatment.

Practices billing neuroma excision alongside T87.33 should read the payer’s local coverage determination for the procedure. For instance, some Medicare Administrative Contractors need prior authorization, or proof of certain diagnostic criteria, before they approve an excision reported with T87.33.

Approximate synonyms in the medical record

Medical records use several different terms for the condition coded as ICD-10 Code T87.33. So, knowing these synonyms lets coders reach the right code from a physician note, an operative report or a referral letter, without a direct code reference.

• Terminal neuroma, right residual limb
• Amputation residual limb neuroma, right lower extremity
• Post-amputation neuroma, right leg stump
• Stump neuroma, right lower limb
• Traumatic neuroma of right lower extremity amputation site
• Nerve stump pain due to neuroma formation, right leg

None of these terms points to phantom limb pain. A note describing pain in the foot, or in a missing toe, is phantom pain territory and belongs to G54.6. By contrast, a note describing pain at the stump, or at the end of the residual limb, belongs to T87.33.

How Pabau keeps T87.33 claims consistent from note to payer

Coding T87.33 correctly is one step. Even so, the claim still has to leave the practice with the diagnosis, the procedure code and the patient’s insurer details in agreement. Practice management software like Pabau holds all three in the same patient record. As a result, the coder is not matching a clinical note against a separate billing system.

Pabau’s claims management software runs eligibility checks before the visit, builds the CMS-1500 from the encounter record, and submits it through the Claim.MD integration. Claim status and electronic remittance advice come back into the same screen, so a denial on a T87.33 claim surfaces without a portal login.

Amputation patients are treated over years rather than visits, so that history matters. For this reason, prior amputation documentation, previous stump exams and earlier claims all sit in one record. That is the evidence a payer asks for when it reviews a T87.33 claim.

Keep ICD-10 claims consistent from note to payer

Pabau’s claims management tools support ICD-10-CM code entry, eligibility checks and electronic claim submission through our Claim.MD integration. Practices see claim status and remittance advice in the same record as the visit.

Book a demo

Conclusion

T87.33 is a narrow code, and that is its value. Three elements in the record make it defensible. The chart needs a documented right lower extremity amputation, a clinical finding of a stump neuroma, and clear laterality.

Practices rarely lose money on this code because of the code itself. Instead, the loss usually traces back to a note written before anyone expected the claim to be reviewed. Building the laterality and the stump finding into the routine assessment is what stops that.

Pabau builds the claim from the encounter record and routes it to thousands of US payers through Claim.MD. Book a demo to see how the coding and the claim stay in one place.

Continue your research

Need a framework for managing ICD-10 claim denials? Denial management in healthcare covers root causes, appeal workflows, and prevention strategies for common ICD-10 coding denials.

Want to understand how claims reach payers? How Claim.MD clearinghouse works explains the electronic claim pathway from practice management system to payer adjudication.

Looking for guidance on clean claim submission? Clean claim requirements details what payers check before processing any ICD-10 coded claim.

Frequently asked questions