ICD-10 code S95.919A: Laceration of unspecified blood vessel at ankle and foot

Key takeaways

S95.919A is a billable ICD-10-CM code for laceration of an unspecified blood vessel at ankle and foot level.

The code took effect on October 1, 2025 for FY 2026, and it covers the initial encounter only.

Use ‘D’ for subsequent encounters and ‘S’ for sequela, because the wrong 7th character is a common denial trigger.

‘Unspecified leg’ holds only when laterality is genuinely undocumented, so use S95.911A or S95.912A when the record names the side.

Practice management software like Pabau ties codes such as S95.919A to the patient record, which cuts manual entry errors.

ICD-10 code S95.919A is a billable, specific ICD-10-CM diagnosis code. It covers a laceration of an unspecified blood vessel at ankle and foot level, unspecified leg, initial encounter. The 2026 edition took effect on October 1, 2025. The CDC/NCHS ICD-10-CM web tool confirms it as valid for reporting on CMS-1500 and UB-04 claim forms.

The code sits in the S90-S99 block for ankle and foot injuries, under category S95. Reach for it when a clinician documents a laceration involving a blood vessel at the ankle or foot. It applies only when the specific vessel is not named and the record does not state which leg.

Full code description and classification hierarchy

Knowing where S95.919A sits in the ICD-10-CM hierarchy helps coders reach the right code faster. It also shows when the documentation supports a more specific alternative. The CMS ICD-10 codes page publishes the full tabular list and the annual update files for each fiscal year.

Code hierarchy: S90-S99 to S95 to S95.919A

The code traces a four-level path from the broad injury chapter down to the billable code. Each level adds clinical precision, from block to category to subcategory to the 7th-character extension.

Coders working in physical therapy and vascular surgery practices meet the S95 category often after lower-extremity trauma. Accurate navigation of the hierarchy prevents coding to a non-billable parent such as S95.919.

Understanding the 7th character ‘A’

The 7th character extension is what turns the base code S95.919 into a billable, specific code. ICD-10-CM Official Guidelines Section I.C.19 require a 7th character on every traumatic injury code in the S section. It records the type of encounter, and the wrong choice is a reliable route to a medical necessity denial.

A common error is using ‘A’ at every visit because the wound is still being managed. The 7th character reflects the phase of treatment, not how far the wound has healed. Once the initial treatment decision is made and the patient returns for routine care, ‘D’ applies. The same pattern runs through the rest of the S section, where S63.631D marks a subsequent visit and S72.455S marks sequela.

For sports medicine practices managing traumatic ankle injuries, this distinction matters at every follow-up visit. It also decides whether the claim clears the payer’s encounter-type edits.

Clinical context: When is S95.919A used?

S95.919A applies when a laceration has damaged a blood vessel at the ankle or foot level. It also requires that the specific vessel cannot be identified and that the leg is not recorded. Both situations turn up in emergency settings. The code becomes an overcoding risk when the record does name the side.

Typical clinical scenarios that may support this code include:

• Deep laceration from glass or sharp debris with visible vascular bleeding, and no vessel named in the operative note
• Emergency department presentation where the wound is controlled but imaging or surgical exploration has not confirmed the vessel
• Trauma documentation completed before laterality could be confirmed, as in mass casualty or unconscious patient settings
• Pediatric or unresponsive patients whose injury history is unavailable when the initial coding is done

Documentation requirements for accurate coding

Coders cannot assign S95.919A without specific clinical support in the record. The treating clinician has to document these elements to justify the code over a more specific alternative:

• Injury type: A laceration affecting a blood vessel, rather than a contusion, rupture, or avulsion
• Anatomical site: Ankle and foot level, rather than the lower leg, calf, or popliteal region
• Vessel specificity: A note stating that the vessel is unidentified. A named vessel such as dorsalis pedis or posterior tibial points to a more specific code
• Laterality: No mention of a side anywhere in the record. If a side is named, use S95.911A for the right leg or S95.912A for the left
• Encounter type: Explicit or contextually clear confirmation that this is the initial treatment visit

Practices using digital intake forms can build laterality and vessel prompts into the trauma assessment workflow. That puts the specificity question in front of the clinician while it can still be answered.

Approximate synonyms and alternate descriptions

ICD-10-CM index entries and coding references use several alternate phrasings for the condition behind S95.919A. Knowing them helps when you search the alphabetic index or work inside an electronic coding tool.

• Laceration of blood vessel, ankle and foot, unspecified leg, initial encounter
• Cut wound of unspecified blood vessel at ankle and foot level, unspecified extremity
• Traumatic laceration, vascular structure, ankle or foot, laterality unspecified
• Open wound with vascular involvement, ankle or foot region, unspecified leg
• Injury of unspecified blood vessel, ankle and foot level, laceration, initial encounter

None of these synonyms creates a separate code. They all map to S95.919A once the vessel, the leg, and the encounter conditions are met. The WHO ICD-10 browser gives extra reference for international coding contexts where the terminology differs.

Related ICD-10-CM codes in the S95 category

S95.919A sits within a structured set of laterality and encounter variants. Picking the wrong sibling code is the most common specificity error in this category. The table below covers the codes you meet alongside or instead of S95.919A.

How S95.919A differs from S95.911A and S95.912A

The only clinical distinction between these three codes is documented laterality. S95.919A is never the better choice when the treating side appears anywhere in the record. That includes the operative note, the ED triage form, and the imaging reports.

Coders should query the treating clinician when no side is documented, rather than defaulting to the unspecified variant. Neighboring lower-leg codes such as S89.92XA carry the same laterality requirement.

Payers increasingly run clinical edit software that flags unspecified-leg codes. The flag fires when the patient’s claim history already includes a code that names the side. Repeated use of S95.919A where the record supports S95.911A or S95.912A is an audit risk.

Associated CPT codes for billing with S95.919A

S95.919A is a diagnosis code, so the claim also needs a CPT procedure code for the repair itself. The table below shows the CPT codes commonly paired with vascular repair at the ankle and foot. Verify current pairings against the AAPC Codify lookup and current AMA CPT guidance, since medical necessity requirements update annually.

CPT-to-ICD-10 medical necessity crosswalks change with each coding year. Practices billing complex trauma should confirm every paired code against current CMS fee schedule guidance before submission.

ICD-9-CM equivalent for S95.919A

The approximate ICD-9-CM predecessors for S95.919A are shown below. These are general equivalents used in legacy billing data and research contexts. The mapping stays approximate, because ICD-9-CM never carried the laterality or encounter-type granularity of ICD-10-CM.

ICD-9-CM code 904.8 is the closest functional match to S95.919A, but it covered the whole lower extremity. Historical claims research should account for that difference in granularity. The ResDAC coding resources page explains how ICD codes appear across Medicare claim files. Teams reconciling legacy data with current Medicare billing rules should treat the crosswalk as a starting point.

How to use S95.919A in Pabau

Practice management software like Pabau lets you apply ICD-10-CM codes inside the patient encounter itself. The diagnosis stays attached to the clinical note that generated it. Nobody has to retype a code from a separate lookup tool onto a claim form.

The workflow for coding a vascular ankle laceration in Pabau follows this sequence:

1. Open the patient encounter. Go to the clinical note for the visit where the laceration was first treated. Confirm that the encounter date matches the initial treatment date before you apply the ‘A’ extension.
2. Search for the diagnosis code. In the diagnosis field, type S95.919 or a plain description such as laceration blood vessel ankle. Pabau’s client record supports search by code number or description.
3. Confirm laterality before selecting. Review the clinical note for any mention of the left or right leg. Select S95.911A or S95.912A instead when a side is documented.
4. Attach it to the claim. Use Pabau’s claims management to link the diagnosis code to the CPT procedure code on the CMS-1500 or UB-04 form.
5. Document the encounter type. The 7th character ‘A’ is built into S95.919A, so confirm this is the initial treatment visit. For follow-ups, open a new encounter and select S95.919D. Pabau Scribe, our AI scribe, flags the encounter type inside the note to support accurate 7th-character assignment.

Accurate ICD-10 coding starts with better documentation

Pabau links ICD-10-CM codes to patient encounters, clinical notes, and claim submissions. That cuts unspecified-code errors and keeps vascular injury billing clean.

Book a demo

A laterality prompt inside your SOAP progress notes catches the omission before anyone reaches the coding step. That keeps the unspecified-leg code a last resort rather than a default.

Conclusion

Unspecified-leg codes like S95.919A are valid, and sometimes unavoidable. They should still never be the default choice. Every claim that could have carried S95.911A or S95.912A is a documentation problem waiting for a payer audit.

Pabau’s compliance management tools and built-in ICD-10-CM coding help clinical teams record laterality at the point of care. The diagnosis, the 7th character, and the claim then come from the same record, with no manual transcription. Book a demo to see how Pabau handles ankle and foot coding from documentation through to billing.

Continue your research

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Frequently asked questions