ICD code S96.092A – Other injury of long flexor toe tendon

Key takeaways

S96.092A is a billable ICD-10-CM code for other injury of the long flexor toe tendon of the left foot, initial encounter. It does not cover strains or lacerations.

The 7th character A marks active treatment. Use D for subsequent encounters and S for sequela, since a wrong 7th character is the most common denial trigger.

The 6th character records the foot, not the toe: 1 is right, 2 is left, and 9 is unspecified. The record must document the left foot to support S96.092A.

Pabau’s claims management software scrubs every claim for missing or invalid details before submission, so fewer S96.09x claims come back unpaid.

ICD-10 Code S96.092A: Code at a glance

The table below captures every quick-reference field a coder or biller needs before submitting a claim. Confirm the code’s active status against the current fiscal year Tabular List using the CDC/NCHS ICD-10-CM web tool before each coding cycle begins.

What S96.092A covers

S96.092A captures left-foot injuries of the long flexor muscle and tendon of the toe at ankle and foot level. The injury is neither a strain nor a laceration. “Other injury” in ICD-10-CM is a defined residual category. It holds documented pathology that doesn’t fit the more specific descriptors in the same subcategory.

In practice, this includes contusions to the tendon sheath and traumatic tendinopathy. The provider has documented an injury mechanism but cannot classify it as a strain. The structures captured are the flexor digitorum longus and flexor hallucis longus tendons, which flex the toes, as they pass through the ankle and foot.

• Long flexor tendon of the toe: The code does not identify an individual toe. It covers the long flexor muscle and tendon serving the toes, whichever toe the note names.
• At ankle and foot level: The injury site must be at or distal to the ankle mortise, not mid-shaft of the lower leg. Proximal tendon injuries use different code blocks.
• “Other injury” vs. strain: Strain codes (S96.01x) require documentation of a stretch or overuse mechanism with intact but damaged tendon fibers. If the provider documents another injury type, such as a tendon contusion, S96.092A is the appropriate selection.
• Left foot only: The 6th character 2 means the left foot. A right-foot injury takes S96.091A, and S96.099A applies only when the record does not state the side. Query the provider before choosing unspecified if the note is unclear.

Code hierarchy: S96 parent category and subcategories

Understanding where S96.092A sits in the ICD-10-CM hierarchy helps coders navigate adjacent codes quickly and select the correct level of specificity. The AAPC Codify ICD-10-CM lookup displays the full S96 hierarchy with cross-references to related ranges.

S96.092 is a non-billable placeholder without the 7th character. Submitting S96.092 without a 7th character will result in an automatic code-validity rejection from the clearinghouse. The full 7-character code S96.092A is required for every initial-encounter claim.

Read the code left to right and each character answers one question about the injury, as the breakdown below shows.

Laterality: How the 6th character identifies the left foot

In the S96.0 subcategory, the 6th character records which foot is injured, not which toe. The digit 1 means the right foot, 2 means the left foot, and 9 means the side is unspecified. S96.092A is therefore the left-foot code, and the record has to say so.

• S96.091A: Other injury of the long flexor toe tendon, right foot, initial encounter.
• S96.092A: Other injury of the long flexor toe tendon, left foot, initial encounter.
• S96.099A: Other injury of the long flexor toe tendon, unspecified foot, initial encounter.

The same pattern runs through the strain (S96.01-), laceration (S96.02-) and unspecified injury (S96.00-) codes. Payers treat unspecified-foot codes as a documentation weakness, so query the provider whenever the note leaves the side unclear.

7th character options: Initial, subsequent, and sequela encounters

The 7th character is the single most common coding error on S96.092x claims. All three extensions follow a standard rule across the traumatic injury chapter (S00-T88). The character reflects the phase of care, not the time elapsed since the injury.

Common error: Using A (initial encounter) for a physical therapy visit that follows a completed emergency department evaluation. Once active treatment is complete and the patient enters a routine recovery program, switch to the D extension. Coding A throughout a multi-month rehab course misrepresents the encounter type. It can also trigger post-payment audits.

Excludes notes and what ICD-10 Code S96.092A does not cover

The S96 category carries two Excludes2 notes and one “Code also” instruction. None of them stops S96.092A from sharing a claim with the listed codes when the record documents both conditions.

• Excludes2 (may code together when both are documented): Injury of Achilles tendon (S86.0-). An Achilles injury is not part of S96.092A and takes its own code from S86.0-. When the record documents both injuries, report both codes.
• Excludes2: Sprain of joints and ligaments of ankle and foot (S93.-). Ligament sprains are structurally distinct from tendon injuries, so S96.092A never describes one. If a note documents both an ankle sprain and a flexor tendon injury, code each one.
• Code also (may code together when both conditions exist): Any associated open wound of ankle and foot (S91.-). If the tendon injury occurred through an open wound, code S96.092A plus the appropriate open wound code from S91. The “Code also” instruction means both codes belong on the same encounter.
• Not covered by S96.092A: Lower leg tendon injuries proximal to the ankle mortise use the S86 range. Strains (S96.012A), lacerations (S96.022A) and right-foot injuries (S96.091A) also take their own codes.

Codes not to confuse with S96.092A

The S96.09x range shares an anatomical site with several strain and extensor codes. Every code below is the left-foot version, so the foot side matches S96.092A and only the injury type or tendon differs.

The ICD List code lookup shows each code’s full descriptor side by side, which helps during coding review.

CPT codes commonly paired with S96.092A

Medical necessity alignment between the ICD-10-CM diagnosis and the CPT procedure is a standard payer audit trigger. The rehab-phase codes need the most care here. Therapeutic exercise billed under 97110 belongs with S96.092D once active treatment ends, not with S96.092A.

Verify all CPT-to-ICD-10 pairings against current NCCI (National Correct Coding Initiative) edits before submission. NCCI edit tables change quarterly, so a pairing that was valid last quarter may carry a new unbundling edit this one.

Documentation requirements for S96.092A

Solid medical billing documentation is the foundation of a defensible S96.092A claim. Payers reviewing denials look for specific elements that justify both the diagnosis code and the encounter type.

• Mechanism of injury: The record must describe how the injury occurred (e.g. forceful toe flexion against resistance, direct blow, sports collision). “Foot pain” without a documented mechanism does not support an injury code from Chapter 19.
• Specific tendon named or implied: The treating provider must reference the long flexor tendon or flexor digitorum longus/hallucis longus. General “tendon injury” language without anatomical specification risks a code-validity query from the payer’s clinical review team.
• Encounter type documentation: The note must confirm this is an initial evaluation of a new or acute injury. If the patient was seen elsewhere first, the provider should document any prior treatment and the injury’s current stage. That drives the 7th character decision.
• Laterality notation: The record must state that the injury is in the left foot. The 6th character of S96.092A asserts the left side, so a note that names the right foot or no side does not support it. The ResDAC ICD coding guidance confirms unspecified codes are acceptable only when documentation cannot support more specificity.
• Injury type descriptor: The record must support “other injury,” meaning the provider documented a pathology that is neither a strain nor a laceration. Clinical language such as “tendon contusion” or “traumatic tendinopathy” grounds that selection.

Payer requirements and prior authorization for S96.092A

Payer requirements vary by Medicare Administrative Contractor (MAC), commercial plan, and state workers’ compensation authority. The notes below reflect general patterns.

Always verify them against the specific payer’s Local Coverage Determination (LCD) and policy articles before submitting. CMS ICD-10 coding guidance provides the federal framework that MACs use when developing their local policies.

Pabau, the practice management platform we build, sends S96.092A claims through Claim.MD to thousands of US payers. A real-time eligibility check confirms coverage before the visit. Electronic remittance advice then comes back into Pabau, tied to the claim it settles.

For workers’ compensation claims, confirm the state fee schedule rate for S96.09x codes. Reimbursement can differ substantially from Medicare rates, and some state comp systems apply separate modifier requirements.

Applying good medical billing compliance practices means keeping prior-authorization tracking separate from the coding record. A denied claim can then be traced to whether PA was obtained, as well as whether the code was correct.

Common S96.092A claim denial reasons and how to avoid them

Most S96.092A denials fall into five categories. Good denial management workflows address each at the point of claim creation rather than on appeal. That saves an average of 30-45 days per denied claim cycle. Practices using dedicated claims management software can automate checks for several of these before claims leave the practice.

A clean claim submission for S96.092A requires all five of these checks to pass before the claim leaves the practice. A pre-submission checklist in the billing workflow costs far less than correcting claims after they are denied.

When a claim does come back, the payer’s denial codes name the reason, which tells you whether to correct and resubmit or appeal.

How Pabau prevents denials on S96.092A claims

Most S96.092A denials start with a coder rereading a clinical note to confirm the encounter type, the injury type and the foot. When those checks happen by hand at month-end, a wrong 7th character or foot side reaches the payer first.

Pabau keeps the clinical note, the diagnosis code and the claim in one patient record. The coder checks the code against the note without switching systems. Its claim validation scrubs every claim for missing or invalid details before submission.

The claim then goes out through Claim.MD, and a rejected claim comes back with its reason so you can correct and resubmit.

The result is fewer returned claims on foot and ankle tendon injuries. Your billing team also spends less time on appeals that a pre-submission check would have prevented.

Reduce denials on ankle and foot injury claims

Pabau’s claim validation scrubs every S96.09x claim for missing or invalid details before submission. Errors get fixed in your billing queue instead of on appeal.

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Conclusion

S96.092A is only correct when the note documents a left-foot long flexor tendon injury that is neither a strain nor a laceration, treated actively. If any one of those facts is missing, the claim needs a different code or a provider query before it goes out.

Checking the foot side and the 7th character at the point of coding costs seconds, while an appeal costs weeks. Book a demo to see how Pabau scrubs S96.09x claims for missing or invalid details before they reach the payer.

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