ICD-10 Code S01.341A: Puncture wound with foreign body of right ear

Key takeaways

ICD-10 Code S01.341A covers a puncture wound with a foreign body of the right ear at the initial encounter.

The code is valid for FY2026, which runs from October 1, 2025 through September 30, 2026.

S01.341A is billable and accepted for HIPAA-covered transactions when the record documents laterality, wound type, and a retained foreign body.

The 7th character A means active treatment. Choosing D or S by mistake is a common trigger for denial.

Practice management software like Pabau puts ICD-10 lookup inside the clinical record, so codes are never retyped between two systems.

ICD-10 Code S01.341A: Definition, billable status, and FY2026 validity

ICD-10 Code S01.341A is the billable code for a puncture wound with a retained foreign body of the right ear, initial encounter. It is the fully specified code to reach for when a patient arrives with this exact mechanism of injury. Every head and ear injury code in the S00-S09 chapter shares the same A, D, and S framework. The 7th character is decided at the point of documentation.

The code is valid under the CMS ICD-10-CM code set for fiscal year 2026, effective October 1, 2025 through September 30, 2026. It sits within the S00-S09 chapter for injuries to the head, under category S01 for open wounds of the head. Below is the complete quick reference.

Clinical meaning of a puncture wound with a retained foreign body

A puncture wound with foreign body of the right ear is a penetrating injury where an object stays in the wound. The site is the right external ear. In practice that covers an earring backing embedded in the earlobe or a splinter driven into the cartilage. It also covers a metal fragment lodged in the ear canal after a workplace accident.

Three elements have to be present together before this code beats a simpler open wound code. The wound must be a puncture rather than a laceration or avulsion. The foreign body must be documented as retained. And the site must be confirmed as the right ear.

• Wound type: Puncture, meaning a narrow, deep tract from a sharp or pointed object, rather than an incised wound, laceration, or bite
• Foreign body: An object documented as present in or embedded within the wound at the time of the encounter
• Laterality: Right ear specifically, whether recorded as the right auricle, right external ear, or right ear canal
• Encounter type: Initial encounter, meaning the patient is receiving active treatment for the injury

If any of these elements is missing from the record, a different code applies. A puncture wound with no documented foreign body maps to S01.331A. A wound of the left ear takes a 2 in the sixth position, and an unspecified ear takes S01.349A. Consistent medical documentation practices at the point of care are the most reliable safeguard against that rework.

How the 7th character works: A, D, and S

The 7th character turns the parent code S01.341 into a fully billable, encounter-specific code. Across all three variants, it tells the payer which phase of care the visit represents.

Choosing between S01.341A, S01.341D, and S01.341S

The most common 7th character error is using A for a follow-up wound check after the foreign body has already been removed. Per the CDC ICD-10-CM guidelines, “initial encounter” describes the phase of active treatment, not the first time a given provider sees the patient.

Take a patient who goes to the emergency department for foreign body removal, then sees a family physician five days later for a wound check. That return visit is coded D, even though the family physician has never met the patient before. Practices running on primary care software see this pattern constantly, because the follow-up almost always lands somewhere other than the treating site.

Sequela is reserved for visits where the reason for care is the late consequence of a healed injury. It also requires an additional code for the specific late effect. If a wound infection is treated with an intravenous antibiotic, the encounter may carry a drug code such as J1364 as well. Fracture codes stretch the same logic further with characters for healing status, as in S52.262K.

Where S01.341A sits in the code hierarchy

Understanding the full hierarchy helps coders audit their own selections and find related codes quickly. S01.341A sits at the most specific level of a five-tier structure.

The parent code S01.341 is not billable on its own. It needs a 7th character to become a specific, reimbursable code, and submitting it bare will be rejected in most HIPAA-covered transactions. Not every head injury lives in this chapter either. Birth injuries are coded from the perinatal chapter instead, as with P10.3.

Related and sibling ear wound codes

Coders often cross-reference S01.341A against its siblings to confirm laterality and wound type. The table below covers the codes most frequently confused with it.

The AAPC ICD-10-CM lookup tool lets coders browse the full S01.3 subcategory. Comparing adjacent codes side by side is the quickest way to confirm a choice.

How the S01 category is organized

The S01 category covers every open wound of the head. Ear wound codes are sorted by mechanism first, then by laterality. Mechanism covers laceration, puncture without foreign body, puncture with foreign body, and open bite. Confirm the mechanism and the correct ear, and you can go straight to the code without reading the full S01 list.

Documentation requirements for S01.341A

Thin documentation is the most common reason an auditor downcodes a foreign body ear wound to something less specific. The record has to support all four elements of the code before it can be assigned.

• Wound mechanism: The note must describe a puncture. “Puncture,” “penetrating wound,” or “nail injury with retained object” all work. “Cut” or “laceration” will not support S01.341A.
• Foreign body present: The record must show that an object was found, identified, or removed during the encounter. Phrases such as “foreign body noted in wound” or “earring post embedded” support the code. A note that describes only the puncture shifts the code to S01.331A.
• Laterality: “Right ear,” “right auricle,” or “right external ear” must appear in the history, the examination findings, or the procedure note. “Ear” alone is not enough.
• Encounter type: The chief complaint and plan should make the phase of care obvious. Active treatment language supports the 7th character A.

Practices that standardize their clinical record templates to prompt for these four elements capture the detail without adding clinician workload. Fields for laterality, wound description, and foreign body status can sit in the digital form itself, which makes compliant documentation the path of least resistance. The same specificity carries into patient-facing paperwork, including any diagnosis letter issued after the visit.

Coding guidelines and compliance notes

Several ICD-10-CM Official Guidelines apply specifically to injury codes in the S00-T88 range. Anyone working with S01.341A should know each of the following.

• Laterality is required: Guidelines instruct coders to code to the highest level of specificity the documentation supports. For ear wounds that means right or left whenever the record says so. Defaulting to “unspecified” when laterality is documented is a coding error with compliance consequences.
• Foreign body must be explicit: Codes for puncture wound with foreign body need the object identified in the record. Assigning S01.341A on clinical inference alone is not supported.
• Multiple injuries at the same visit: Code each additional injury separately, following the sequencing rules in Section I.C.19. The principal diagnosis is usually the injury that prompted the visit or took the most resources to treat.
• External cause codes: Guidelines recommend external cause codes from the V, W, X, Y ranges to capture how the injury happened. They are not universally required. Many payers and hospital systems require them on injury encounters. A wound caused by broken glass, for example, picks up a code such as W25.XXXD at the follow-up visit.

For the authoritative text on injury coding, use the official CMS guidelines for US billing and the WHO ICD-10 reference for international context. Practices that build compliance management workflows into their software can surface these rules as prompts during code selection. That turns a guideline nobody rereads into a check that runs on every claim.

Approximate synonyms and index entry points

The alphabetic index routes coders to S01.341A through several entry points. Knowing the synonyms helps when a clinician’s note uses non-standard wording.

• Puncture wound with foreign body, right ear, initial encounter
• Foreign body puncture wound, right ear, initial encounter
• Penetrating wound with retained foreign object, right auricle, initial encounter
• Right external ear puncture wound with embedded foreign body, initial encounter
• Right ear canal penetrating injury with foreign body, initial encounter

In the alphabetic index, start at “Wound, open,” then move to “ear,” then “puncture,” then “with foreign body.” The entry “Foreign body, in wound, ear” reaches the same code range. Most coders now rely on EHR-integrated code lookup and search by keyword instead.

How Pabau keeps injury coding inside the clinical workflow

Errors on S01.341A rarely start with the coder picking the wrong code. They start in the handover. The chosen code gets retyped from a reference site into a billing system. Somewhere in that step, a digit or a 7th character falls off.

Practice management software like Pabau closes that handover. Our claims management software puts ICD-10 search inside the clinical encounter. A clinician or coder can look up S01.341A, confirm the description and billable status, then attach it to the claim. No second application is involved. The code that goes on the note is the code that goes on the claim.

Digital clinical forms can then prompt for the four elements S01.341A needs: wound type, foreign body status, laterality, and encounter type. When the form captures those fields, the code follows from the documentation instead of a retrospective review. Injury-heavy settings feel this most, which is why sports medicine practices tend to build the prompts into the note template itself.

Attaching the code at the point of care is also what keeps a claim clean weeks later, when nobody remembers the visit. That is the same discipline behind HIPAA-compliant practice software and behind any integrated practice management platform worth adopting.

Keep ICD-10 coding inside the clinical workflow

Pabau connects diagnosis code selection to claim submission in one workflow, so injury codes are never retyped between a reference site and a billing system. See how it works for your practice.

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Conclusion

S01.341A rewards a coder who gets four things right at once: mechanism, foreign body, laterality, and 7th character. Miss one and the claim still goes out, just on a vaguer code that pays less and reads worse under audit.

The fix is upstream of the coder. Build the four elements into the note template for ear injuries. The correct code then becomes the obvious one, not a judgment call made days later.

Want the code to travel from the note to the claim untouched? Book a demo and see how Pabau handles injury code documentation for your practice.

Continue your research

Coding the follow-up visit for a glass injury? W25.XXXD shows how the same 7th character logic plays out on an external cause code.

Need the external cause code for a constriction injury? W49.09XD walks through documentation and sequencing for the W49 range.

Want the documentation to support the code first time? Medical forms for practices explains how structured digital forms capture the detail an auditor looks for.

Comparing tools for cleaner claims? Pabau vs. Waystar sets the two claims platforms side by side on submission, tracking, and denials.

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