ICD code T87.41 – Amputation stump infection, right upper extremity

Key takeaways

ICD-10 Code T87.41 covers infection of an amputation stump on the right upper extremity, and no other laterality.

T87.41 is a complete, billable five-character code with no 7th character, while its parent T87.4 is a non-billable header.

Add a B95-B97 code when culture results identify the causative organism.

Code infection and necrosis of the same stump together when the physician documents both.

Pabau’s claims management software checks eligibility in real time and tracks claim status, so you can follow each T87.41 claim through to payment.

ICD-10 Code T87.41: Quick reference

ICD-10 Code T87.41 is the billable ICD-10-CM code for infection of amputation stump, right upper extremity.

It is a complete five-character code in Chapter 19 of the Tabular List, with no 7th character to add. Use the table below to check its status, descriptor, and place in the hierarchy before submission.

What does T87.41 cover? Code definition and clinical scope

T87.41 covers infection at an amputation stump on the right upper extremity. The infection develops at or around the residual limb after amputation of any part of the right arm. That includes the hand, wrist, forearm, upper arm, or shoulder girdle.

The code applies to both early postoperative wound infections and late-developing stump infections in established amputees. For coding, the physician’s documented diagnosis of infection at the stump site matters, not the time since the original amputation.

For this code to hold up on audit, the documentation should reflect these clinical features:

• Erythema, warmth, swelling, or purulent discharge at the residual limb
• Physician narrative explicitly diagnosing infection (not merely “wound complication” or “drainage”)
• Laterality confirmed as right upper extremity in the clinical note
• Link to prior amputation, through either a documented amputation history or an ongoing surgical episode
• Wound culture ordered or resulted (required for organism coding if performed)

The CDC/NCHS ICD-10-CM page publishes the official Tabular List files for each fiscal year. Check T87.41 against the current release every October, when the annual update takes effect.

T87.41 within the T87 code block: Where it sits

Knowing where T87.41 sits in the T87 block prevents the most common laterality and category errors. The T87.4x subcategory covers infection of amputation stump by limb, while neighboring subcategories cover neuroma, necrosis, and other complications.

T87.4 is a non-billable category, so code to the fifth character. The condition the physician documents picks the subcategory. The limb named in the record picks the code, so a left-arm stump infection takes T87.42 instead, as the decision panel below shows. On the lower limb, an infected left leg stump takes code T87.44.

Includes and excludes notes for T87.41

The T87.4 subcategory carries no Includes notes of its own. The guidance below affects how T87.41 is coded and sequenced.

• No Excludes1 note at the T87 block level for stump infections: The block does not explicitly exclude other wound infection categories. Even so, don’t report T87.41 alongside T81.4x (infection following a procedure) for the same encounter. The exception is when both conditions are separately documented and clinically distinct.
• No Excludes1 note between T87.41 and T87.51: Infection and necrosis of the right upper extremity stump can coexist. Code both when both are documented.

T87.41 vs commonly confused codes

The T87.4x subcategory is straightforward once laterality is confirmed. Coders also confuse T87.41 with the necrosis codes (T87.5x) and with post-procedural infection codes (T81.4x). The table below shows when each applies.

The infection vs necrosis distinction is clinically significant. An infected stump may also present with necrotic tissue, and T87.41 and T87.51 are both appropriate when both are documented. Never default to T87.40 when the chart specifies the right upper extremity. The unspecified code is a specificity downgrade that some payers actively flag.

Documentation requirements to support T87.41

Accurate coding of ICD-10 Code T87.41 depends entirely on what the clinical record contains. Coders cannot assign a code that is not supported by physician documentation.

The minimum documentation set for T87.41:

• Diagnosis of infection: The physician note must use infection-specific language. Terms like “erythema at stump” or “wound drainage” alone do not support T87.41, because the clinician must document an infectious process.
• Laterality: Right upper extremity must be explicit. References to “the stump” without laterality force the coder toward T87.40.
• Amputation history link: The infection must be tied to an amputation stump. A note referencing the patient’s right upper extremity amputation (from history, operative report, or prior visits) establishes the clinical context.
• Wound culture: A culture is not required to code T87.41 itself. When results identify the organism, Official Guidelines Section I.C.1 requires an additional code from B95-B97 to identify the causative agent.

Additional codes required when billing T87.41

T87.41 rarely stands alone on a claim. The following companion codes apply depending on encounter details.

Sequencing rule: When the encounter’s primary reason is treatment of the stump infection, T87.41 is the principal diagnosis. Z47.81 (aftercare) is not appropriate as principal when an active complication like T87.41 is being treated. Per Official Guidelines Section I.C.19, the complication code takes precedence.

Payer requirements and prior authorization for T87.41

Medicare prior authorization for T87.41-related services depends on the procedure performed, not on the diagnosis code itself. Debridement (CPT 97597-97598 or 11042-11044) may require prior authorization under Medicare Advantage plans. Standard Medicare fee-for-service does not require it for wound debridement. Local Coverage Determinations (LCDs) govern which wound care services count as reasonable and necessary for stump infections.

• Medicare FFS: No prior auth for the T87.41 diagnosis alone. LCD requirements apply to associated debridement and wound care CPT codes.
• Medicare Advantage: Plans vary. Check plan-specific prior auth lists before scheduling surgical debridement on a T87.41-coded encounter.
• Medicaid: State-level policies differ. Some state Medicaid programs require prior auth for wound care beyond a set frequency, using T87.41 as a trigger for review.
• Commercial payers: Most follow CMS LCD logic for wound care authorization. Confirm with each plan’s provider portal using the specific CPT codes you expect to bill.

The CMS ICD-10 codes page provides current-year code files and links to the MS-DRG Definitions Manual. That manual is where coders verify T87.41’s CC status for each fiscal year.

Common claim denial reasons for T87.41

Most T87.41 denials trace back to three root causes. Each is preventable with the right pre-submission workflow.

• Missing laterality specificity: Submitting T87.40 (unspecified) when the chart documents right upper extremity is a common coding error. Payers running ICD-10-CM specificity edits flag unspecified codes when a lateralized alternative exists.
• Wrong principal diagnosis sequencing: Placing Z47.81 (aftercare) as principal when active infection is the reason for the encounter violates Official Guidelines. It also triggers medical review. The complication code leads when the visit is for active infection management.
• Missing organism code: Culture and sensitivity results on file that identify the organism call for a B95-B97 code. Payers increasingly look for that code in value-based audit programs, and its absence weakens the claim.

Reviewing denial management workflows for amputation stump codes before the claim goes out reduces rework. When a claim does come back, our guide to denial codes in medical billing explains what each payer reason code means and how to respond.

ICD-9-CM to ICD-10-CM crosswalk for T87.41

Coders reviewing legacy claims or historical data need to know how T87.41 maps from the predecessor system. An unspecified late stump complication coded 997.60 now maps to T87.9.

The key change in the ICD-10 transition is that laterality became part of the code. ICD-9-CM already had a separate code for stump infection, 997.62, but it did not distinguish right from left or upper from lower. Treat historical data converted with the General Equivalence Mappings (GEMs) with care, because 997.62 maps to five ICD-10-CM codes.

Our guide to medical billing fundamentals covers how diagnosis codes move through the claim cycle. The AAPC Codify ICD-10-CM lookup lets coders search both ICD-9 and ICD-10 codes and view crosswalk notes directly.

MS-DRG and reimbursement impact of T87.41

T87.41 may carry Complication or Comorbidity (CC) status in the CMS MS-DRG grouper. Verify CC/MCC status in the current Definitions Manual, v44 for FY2027. Where it does carry CC status, T87.41 as a secondary diagnosis can shift an inpatient claim to a higher-weighted DRG.

Take a patient admitted for debridement of an infected amputation stump. With T87.41 coded as a secondary diagnosis and CC status confirmed, the stay can group to a higher-reimbursed DRG than the same admission without it. Leaving off a T87.41 that the documentation supports is both a compliance risk and lost revenue.

• Verify T87.41’s CC/MCC status against the current fiscal year’s MS-DRG Definitions Manual, because CMS publishes annual updates and classifications can change.
• Outpatient and professional fee claims do not use MS-DRG grouping, so the DRG impact applies to inpatient hospital coding only.
• Under Medicare Advantage risk adjustment (HCC model), T87.41 may contribute to the patient’s RAF score depending on its HCC mapping for the contract year. Confirm with your payer’s risk adjustment documentation.

How claims management software supports T87.41 billing

Without an integrated clearinghouse, a T87.41 claim means coding in one system, checking coverage on a payer portal, and chasing claim status by phone. Pabau, the practice management and billing platform we build, connects to Claim.MD, a clearinghouse that reaches thousands of US payers.

Through that integration, Pabau runs real-time eligibility checks (270/271) before the visit and submits CMS-1500 claims electronically. Claim status and electronic remittance advice (ERA) come back into the same record, so a denied stump infection claim surfaces where the coder already works.

Pabau’s claims management reporting tracks denials and reimbursement by diagnosis code. That shows a billing team when T87.40 keeps appearing on claims where the chart supports T87.41, so coder education targets the pattern.

Get T87.41 claims paid with fewer resubmissions

Pabau checks eligibility in real time, submits CMS-1500 claims electronically, and tracks claim status and ERAs. Follow each T87.41 claim from submission to payment.

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Conclusion

T87.41 is simple to assign once the chart names the infection, the stump, and the right arm. The effort sits in the documentation around it. Query the physician when laterality is missing, and add the organism code when a culture comes back. During active treatment, keep aftercare codes out of the principal position.

Do those three things consistently and T87.40 stops appearing on claims where the record supports T87.41. Getting a clean claim out on the first pass also protects any CC status the code carries on inpatient claims.

Book a demo to see how Pabau checks eligibility and tracks each T87.41 claim through to payment.

Continue your research

Need to understand the broader denial landscape? Denial management in healthcare covers the workflows that reduce rework across all diagnosis code types.

Coding complication codes more broadly? Denial codes in medical billing explains the most common payer denial codes and how to respond to each.

Want fewer resubmissions? What is a clean claim covers the checks that get a claim paid on first submission.

Coding the left arm instead? ICD-10 code T87.42 covers infection of an amputation stump on the left upper extremity.

No specific stump complication documented? ICD-10 code T87.9 covers unspecified complications of an amputation stump.

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