ICD-10 Code S68.113A: complete traumatic MCP amputation of left middle finger

Key Takeaways

S68.113A reports a complete traumatic metacarpophalangeal amputation of the left middle finger, initial encounter. It is billable and valid for FY2026, effective October 1, 2025.

The code is left-side specific. In the S68.11- block the 6th character carries both the finger and the side, so no laterality-neutral middle finger code exists.

Use S68.112A for the right middle finger at the same level, and S68.123A for a partial amputation of the left middle finger.

The 7th character A marks the initial encounter. Use D for subsequent encounters and S for sequela, because the wrong 7th character is a common denial trigger.

Pabau’s claims management software integrates ICD-10-CM code lookup directly into the billing workflow, reducing manual code-entry errors at claim submission.

ICD-10 Code S68.113A: code overview and billable status

Most traumatic finger amputation claims are denied over the wrong 7th character, not the wrong code family. The second trap is laterality, because S68.113A covers the left middle finger only. Physical therapy practices and hand surgery units need billable status, the valid fiscal year, the correct side, and the right encounter suffix.

S68.113A is a billable, specific ICD-10-CM diagnosis code valid for HIPAA-covered transaction submission. The 2026 edition became effective October 1, 2025, per the CMS ICD-10-CM annual update. It has remained active and unchanged since its introduction in the ICD-10-CM tabular list.

7th character subclassification for ICD-10 Code S68.113A: A, D, and S

Traumatic amputation codes in category S68 require a 7th character to indicate the episode of care. Getting this right determines whether a claim pays on first submission. The CDC/NCHS ICD-10-CM coding tool confirms the three standard options for this code family.

Common mistake: Coders sometimes continue using S68.113A across all follow-up visits when the acute treatment phase has ended. Once the provider is managing healing or rehabilitation rather than the original injury, switch to S68.113D. Sequela (S68.113S) applies only when the original wound has healed and the patient presents with a complication caused by the prior amputation.

ICD-10-CM code hierarchy for S68.113A

Understanding where S68.113A sits in the traumatic injury ICD-10 coding hierarchy helps coders confirm correct code selection and identify adjacent codes for documentation review.

The middle finger is the third digit, and S68.113A applies to the left hand. The metacarpophalangeal (MCP) joint is the knuckle where the metacarpal bone meets the proximal phalanx. A complete amputation at this level means the finger separates fully at or through the MCP joint, with no tissue bridge remaining. A partial amputation of the same digit on the same side uses S68.123A.

Related and sibling codes for ICD-10 Code S68.113A

S68.113A belongs to a structured family of finger amputation codes. Coders should review the full sibling table to confirm the digit, the side, and the amputation type. For additional ICD-10-CM diagnosis code reference resources, the alphabetic index is the reliable starting point for code selection.

Why S68.113A is left-side only

The 6th character in S68.11- encodes the finger and the side together. S68.112A and S68.113A both describe a complete MCP amputation of the middle finger, and only the side differs. A laterality-neutral middle finger code does not exist in this block. The side-free options are S68.118A for another finger and S68.119A for an unspecified finger. Reporting S68.119A when the operative note already names the digit invites a denial or a coder query. Use the side-specific code whenever the documentation supports it.

S68.11- sibling codes: complete MCP amputation by digit and side

Complete vs. partial: choosing between S68.113A and S68.123A

The clinical distinction between a complete and a partial amputation at the MCP joint determines which code applies. A complete amputation means the digit is fully severed with no soft-tissue continuity. A partial amputation leaves a tissue bridge, and on the left middle finger that code is S68.123A. Documentation must state “complete” or “partial” outright rather than leaving the coder to infer it from the operative note.

Both families use the same 6th-character pairing, so the side is fixed before the 7th character is ever added.

Traumatic amputation coding guidelines for S68.113A

The ICD-10-CM Official Guidelines for Coding and Reporting govern how traumatic amputations are reported. Applying the ICD-10-CM coding guidelines correctly reduces denials and audit risk across hand surgery and emergency care settings. The WHO ICD-10 classification framework provides the international context, while American ICD-10-CM guidelines govern US payer submission.

• Principal vs. secondary diagnosis: When the traumatic amputation is the reason for the encounter, S68.113A is the principal diagnosis. Additional codes for associated injuries (fracture, vascular injury) are assigned as secondary diagnoses in sequence order.
• External cause codes: Assign an external cause code (Chapter 20) to describe the mechanism of injury (e.g., machinery, industrial accident, power tool). These are supplemental and do not replace the injury code.
• Replantation coding: When replantation is attempted, the procedure code (CPT or ICD-10-PCS) captures the surgical intervention. S68.113A remains the diagnosis code for the injury itself regardless of whether replantation was successful.
• Anatomical level: S68.0- covers thumb MCP amputations, S68.4- covers amputation of the hand at wrist level, and S68.6- covers transphalangeal finger amputations. Confirm the level in the operative report before assigning S68.113A.
• Laterality: ICD-10-CM requires the side when the classification provides it. Report S68.119A only when the documentation does not identify the digit, and query the provider rather than defaulting to it.
• Combination coding: If the patient presents with multiple traumatic finger amputations in the same encounter, assign a separate code for each digit and side amputated.

Strong documentation is the foundation of accurate coding. The operative or emergency note must state the digit and the side, such as left middle finger. It must also record the joint level (metacarpophalangeal), the amputation type (complete), and the encounter type. Efficient revenue cycle management depends on documentation quality at the point of care, not during coding review.

Billing and reimbursement considerations for traumatic finger amputation ICD-10 codes

Most finger amputation claims bundle the diagnosis code with procedural documentation from the same encounter. Correct billing for S68.113A means pairing the diagnosis with a clinically appropriate CPT code and meeting payer documentation requirements before submission. Poor medical billing compliance requirements at this stage are the leading cause of post-payment audits on traumatic injury claims.

Common companion codes

• CPT 26951: Amputation, finger or thumb, primary; each finger (not thumb)
• CPT 26952: Amputation with local advancement flaps
• CPT 26553: Transfer, one digit, including graft (for replantation-adjacent procedures)
• E/M codes (99281-99285): Emergency department evaluation and management paired with S68.113A for the initial acute encounter
• External cause code (W31.xxxA, W27.0xxA): Mechanism of injury codes assigned as additional codes per ICD-10-CM guidelines

Payer and HIPAA submission notes

S68.113A is valid for HIPAA-covered transaction submission, though payer-specific coverage policies determine reimbursement. Always verify medical necessity documentation requirements with the specific payer before billing. Medical billing workflows that build in a pre-submission eligibility check reduce denial rates on high-acuity trauma codes.

Practices submitting claims electronically through a clearinghouse can validate ICD-10-CM codes at submission to catch entry errors before they reach the payer. Pabau integrates with electronic claims via Claim.MD, connecting diagnosis code documentation directly to the claim submission workflow. This reduces the context-switch between code lookup and billing. On a code like S68.113A a single character decides the claim. The 7th character sets the episode of care and the 6th sets the side.

Traumatic amputation codes are a common denial source for practices managing denial management in healthcare. The usual cause is a 7th character that does not match the date of service against the initial treatment episode. Building a clean claim submission process that flags 7th-character mismatches prevents those denials. The claims management software within Pabau surfaces these discrepancies before claims leave the practice.

Accurate superbill documentation for acute traumatic encounters should capture the diagnosis code and the associated CPT procedure code. It should also record the date of service and the treating provider’s NPI. Each of these elements is required for a clean submission on hand surgery and emergency care claims.

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Index references and synonyms for S68.113A

The ICD-10-CM alphabetic index routes several clinical terms to S68.113A and its parent code S68.113. Coders searching by clinical description rather than code number typically start here. The AAPC ICD-10-CM code lookup provides a searchable interface for verifying index terms against the tabular list.

• Amputation, traumatic, finger, at metacarpophalangeal joint (complete) – left middle finger
• Traumatic amputation, left middle finger, MCP level, complete
• Third digit traumatic amputation, complete, metacarpophalangeal joint, left hand
• Finger, middle, left, complete traumatic MCP amputation

When coding from the index, always verify in the tabular list before assigning. The index may route to a parent code (S68.113) that requires a 7th character before it becomes a billable code. The tabular list confirms the correct 7th-character options and any applicable Includes or Excludes notes. The index also does not settle laterality on its own, so confirm the side in the tabular list.

Code history and annual updates for S68.113A

S68.113A has been stable across recent ICD-10-CM fiscal year releases. No revisions have altered the code description or its position in the hierarchy. Coders should confirm annual validity using the official CDC/NCHS ICD-10-CM tool, which publishes the complete tabular list for each fiscal year. Detailed guidance on annual code updates is available via the revenue cycle management reference resources maintained by CMS and NCHS.

Conclusion

Traumatic finger amputation claims fail most often at the 7th character and at laterality, not at the code family. S68.113A is the right code for the initial encounter of a complete metacarpophalangeal amputation of the left middle finger. Use S68.112A when the injury is on the right. Beyond code selection, practices need the documentation and claim-submission workflow to turn accurate coding into clean claims that pay.

Pabau’s claims management software connects ICD-10-CM code documentation to electronic claim submission through Claim.MD. That link helps practices avoid the manual transfer errors that cause denials on codes like S68.113A. To see how Pabau supports traumatic injury billing from documentation through to reimbursement, book a demo.

Continue your research

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Looking for a clearinghouse that validates ICD-10 codes at submission? Pabau’s Claim.MD clearinghouse integration covers how real-time eligibility and claim validation work in practice.

Want to see how a superbill ties diagnosis codes to reimbursement? Superbill documentation walks through the required fields for a complete hand surgery claim.

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