ICD-10 Code S61.210D: Right index finger laceration without nail damage

Key takeaways

ICD-10 Code S61.210D covers a laceration without foreign body of the right index finger, nail intact, at a follow-up encounter.

Nail status sits in the fourth character, not the last one. S61.21- means the nail is undamaged, while S61.31- means the nail is damaged.

The 7th character D is only valid once active treatment has begun and the patient is receiving routine care. Use A while active treatment is still being delivered.

Missing laterality, nail involvement, or encounter type in the clinical note are the three most common reasons this code triggers a claim denial.

Pabau’s claims management software links with Claim.MD to submit claims, check payer eligibility in real time, track claim status, and post ERA remittances.

Laceration without foreign body of right index finger without damage to nail, subsequent encounter

ICD-10 Code S61.210D is a billable ICD-10-CM code for a laceration of the right index finger. No foreign body is retained, the nail is undamaged, and the visit is a subsequent encounter. In practice that means the follow-up appointment, not the visit where the wound was cleaned and closed.

The code is claim-ready for FY2026, from October 1, 2025 onward. According to the CMS ICD-10-CM code set, it sits within the S00-T88 injury chapter under open wounds of the wrist, hand, and fingers.

One point deserves flagging up front, because it is where coders most often go wrong. S61.210D is the code for a right index finger laceration with an intact nail.

The very similar S61.310D covers the same finger and the same encounter type, but only when the nail is damaged. The two are not interchangeable, and a single character decides which one applies. This reference works through that character, the documentation checklist, the sibling codes, and the billing steps that keep a follow-up claim moving.

Code at a glance

The table below captures the core reference data for S61.210D. Verify the current fiscal year edition when submitting claims, since CDC/NCHS updates the ICD-10-CM tabular annually.

What does S61.210D mean? Breaking down the code

Every character in S61.210D carries specific anatomical or clinical meaning. Misreading even one character produces the wrong code and, often, a denied claim. The AAPC ICD-10-CM code reference confirms each position maps directly to the tabular structure.

• S61 – Open wound of wrist, hand, and fingers. This places the injury in the broader S60-S69 section covering hand and finger trauma.
• 2 (fourth character) – Open wound of other finger without damage to nail. Two facts live in this one character: the injured digit is a finger other than the thumb, and the nail is intact. Nail damage changes this character to 3, giving the S61.31- family.
• 1 (fifth character) – Laceration without foreign body. No glass, metal, or other material remains in the wound. A retained foreign body moves this character to 2, giving S61.22-.
• 0 (sixth character) – Right index finger, the second digit of the right hand. This character carries both the finger and the side, so the left index finger takes 1 instead.
• D (seventh character) – Subsequent encounter. The patient is receiving routine care during the active healing phase, after initial treatment has been provided.

Taken together, the code describes a patient returning for follow-up wound care on a clean laceration of the right index finger. The nail is intact and no foreign material was retained. Each of those five elements must be documented in the clinical note to support the code on a claim.

The character order matters more than it looks. Coders often assume nail status is the last thing the code records, because it is the last thing the descriptor mentions. In S61, nail status is fixed at the fourth character, which means it is decided before laterality is even reached.

The map below reads the code position by position, and names the code you land on if you change any one character.

Understanding the 7th character: A, D, and S

The 7th character is the element coders most often misapply on follow-up visits. Every code in category S61 requires one. According to the ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19, the definitions are precise and not interchangeable.

The key distinction between A and D is whether active treatment is being delivered. It is not simply a question of whether this is the first or the second visit. A patient who presents to a second clinician for active surgical debridement still uses A, because that clinician is initiating active treatment. S is reserved for visits where the original wound has fully healed and the patient is now being seen for a late effect.

Decision rules for tricky follow-up visits

The clear cases are easy. These are the wound-care follow-ups where the 7th character is genuinely arguable, and how to settle each one.

• Transfer of care to your practice. The patient was sutured elsewhere and comes to you for the wound check only. D applies, because the active treatment episode is over even though this is your first sight of the wound.
• Wound dehiscence at the follow-up. The wound has opened and you debride and re-close it. That is active treatment again, so A applies at this visit despite it being a scheduled follow-up.
• Delayed presentation. The patient never sought care and turns up eight days later with an unclosed but healing wound. The first treatment you deliver is active treatment, so A applies.
• Infection found at a wound check. Report S61.210D for the laceration and add a code for the wound infection, following the code-also instruction at category S61.
• Scar treatment months later. The laceration is healed and the visit is for a hypertrophic scar or reduced finger flexion. That is S61.210S, not D.
• Nail status never documented. Query the clinician. You cannot default to S61.210D just because the note is silent, and you cannot default to S61.310D either.

A practical shortcut for the routine cases: if the note reads “wound healing well, no signs of infection, sutures removed,” then D is correct. If it reads “wound opened, debrided, repacked,” then A applies even at a follow-up visit.

Laterality and nail involvement: key coding variables

Two variables beyond the 7th character determine the exact code: which finger and side was injured, and whether the nail is involved. Both must be documented explicitly in the clinical note. The table below pairs each digit with its without-nail and with-nail code at a subsequent encounter, for a laceration with no retained foreign body.

Two patterns are worth memorizing from that table. Within the finger codes, the without-nail family runs S61.21- and the with-nail family runs S61.31-, and the sixth character is identical across both. The thumb sits outside that pattern entirely, in S61.0- for an intact nail and S61.1- for a damaged one.

Nail involvement is determined by whether the nail bed, nail plate, or perionychium has been disrupted. A laceration that stops at the fingertip skin without affecting the nail structure uses S61.210D. One that extends into the nail fold or causes nail avulsion uses S61.310D. If the clinical note does not specify nail status, sending a query to the clinician is the right step rather than guessing.

Tabular notes and exclusions at category S61

Two instructional notes govern every code in category S61, including S61.210D. Both change what else appears on the claim, so they are worth checking before submission.

• Code also any associated wound infection. If the follow-up visit documents an infected laceration, S61.210D is reported alongside a code for the infection. The laceration code alone does not capture it.
• Excludes1: open fracture of wrist, hand and finger (S62.- with 7th character B). An open fracture of the index finger is coded to S62 with the B extension. It is not reported with an S61 open wound code for the same injury.
• Excludes1: traumatic amputation of wrist and hand (S68.-). If the injury amputated part of the digit, the amputation code replaces the open wound code rather than joining it.
• A 7th character is mandatory. The appropriate 7th character must be added to every code in category S61. S61.210 on its own is a header, not a claim-ready code.

Because both exclusions are Excludes1, they are mutually exclusive with S61.210D for the same injury. Reporting an open wound code and an open fracture code for the same finger is the classic version of this error. Clearinghouse edits catch it routinely.

Documentation requirements for ICD-10 Code S61.210D

Claim reviewers and auditors check five documentation elements before they accept S61.210D on a claim. A note missing any one of them is a common trigger for a denial or a downcode.

• Finger identity: The note must name the right index finger, or the right 2nd digit, explicitly. “Right finger” is not specific enough for the sixth character.
• Laterality: Right hand confirmed. “Dominant hand” or “the injured hand” without naming the side does not support laterality coding.
• Foreign body status: The note must confirm no foreign body is retained. Phrases like “wound explored, no foreign material identified” or “clean laceration, no debris” satisfy this requirement.
• Nail involvement: Document nail integrity explicitly, for example “nail bed intact” or “nail not involved.” If the note is silent on nail status, S61.210D cannot be defended on audit.
• Encounter type: The note must make clear this is a follow-up or routine wound care visit, not the first active treatment. “Patient returns for wound check, previously sutured on [date]” establishes the subsequent encounter context.

Practices can embed these five prompts directly into their wound-care follow-up note templates. That removes most of the back-and-forth between coders and clinicians at billing time.

Common coding errors to avoid

Finger laceration codes generate a predictable set of claim edits. Most errors fall into four categories, and each one has a straightforward fix.

• Reading nail status off the wrong character: This is the error that produces the wrong code family. S61.21- means the nail is undamaged and S61.31- means it is damaged, and the two differ only at the fourth character. Coding a nail-intact laceration as S61.310D describes a nail injury the patient never had.
• Using A on a follow-up visit: If the patient was sutured at a previous visit and returns only for wound monitoring, A is incorrect. D is required. Using A on a subsequent visit overstates the encounter and may trigger an audit.
• Omitting laterality in the note: A code with right-side specificity requires right-side documentation. If the note says only “laceration of the index finger,” payers may reject the claim for insufficient specificity.
• Applying the wrong digit character: Within S61.21-, the sixth character carries both the finger and the side. Middle, ring, and little finger lacerations each take a different sixth character, and the thumb leaves the S61.2- family altogether. Confirm the digit against the tabular before finalizing.

A practice that catches these errors before submission usually does one thing differently. The coder queries an incomplete note instead of assuming an answer. When one slips through anyway, the remittance names the reason. A shortlist of denial codes shows which of these four errors the payer caught.

Related ICD-10 codes for finger lacerations

S61.210D sits within a larger family of finger laceration codes. Knowing the adjacent codes prevents misassignment when the laterality, nail status, wound type, or digit differs from this scenario. The table below pairs each neighbor with what it changes.

Confirm the CPT-to-ICD-10 pairing before the claim goes out, so the procedure and the diagnosis support each other for medical necessity. The simple repair series runs 12001-12018, and finger repairs fall in the 12001-12007 group covering trunk and extremities.

Approximate synonyms and clinical terms

Clinicians and coders may encounter different terminology in notes and superbills that all map to S61.210D. Recognizing these synonyms prevents an unnecessary query when the clinical intent is already clear.

• Cut to right index finger, nail intact, follow-up visit
• Open wound, right 2nd digit, no nail damage, subsequent encounter
• Laceration right 2nd finger without foreign body, healing phase
• Right index finger wound, suture removal visit, nail bed intact
• Clean laceration right index finger, wound check
• Right hand 2nd digit laceration, no nail damage, follow-up

Billing tips for S61.210D claims

Getting the ICD-10 code right is half the claim. The other half is how it moves through your billing system and reaches the payer without triggering an edit. These tips address the workflow points where S61.210D claims most often stall.

Pair with the correct wound care CPT code

S61.210D at a subsequent encounter typically pairs with evaluation and management CPT codes, usually 99211-99214 depending on medical decision complexity. It can also pair with wound management CPT codes when active wound care is performed at the follow-up. Simple suture removal is generally not separately billable as a procedure by the same provider who performed the primary repair.

If a repair is performed, the simple repair series is 12001-12018, and finger wounds are coded from 12001-12007. The group opens at CPT code 12001, which is where the wound-length thresholds start.

Documenting whether the visit is evaluation and management only, or includes a procedure, decides which CPT code supports S61.210D. Payer-specific edits may disallow certain pairings, so verify with the payer first.

Check eligibility before the claim goes out

Eligibility is the check worth running before a wound-care follow-up claim leaves the practice. Pabau, our practice management software, connects to the Claim.MD clearinghouse for electronic claim submission, real-time eligibility checks, claim status tracking, and ERA remittance posting.

That connection does not read your diagnosis codes. Nail status and the 7th character still have to be right in the note before the claim is built. That is why the documentation checklist above comes first.

For a practice running a high volume of wound-care follow-ups, checking eligibility before the visit removes a whole class of denial. Software built for cleaner claims management runs that check against the payer without a phone call.

Telehealth billing considerations

S61.210D can appear on telehealth claims when the subsequent encounter is a virtual wound check. Payer eligibility for telehealth billing of wound-care visits varies. Place-of-service codes and payer-specific telehealth policies govern whether a virtual visit for wound monitoring will be reimbursed. Always verify the individual payer’s telehealth policy before submitting S61.210D with a telehealth place-of-service code.

How Pabau keeps finger laceration claims clean

In most practices, the nail status and the encounter type live in a free-text note, and the ICD-10 code is picked separately at billing time. That is how S61.210D turns into S61.310D, or how D turns into A. Nobody notices until the remittance advice arrives.

Pabau keeps the clinical note and the claim in one record. Wound-care follow-up templates can prompt for nail integrity and prior treatment as structured fields, so the coder reads the answer rather than guessing at it. Diagnosis codes attach to the visit at the point of care.

From there, the Claim.MD integration submits the claim electronically and checks payer eligibility in real time. It also tracks claim status and posts the ERA remittance when the payer responds. The result is a shorter path from wound check to payment.

Streamline your ICD-10 billing workflow

Pabau connects directly with Claim.MD to submit claims electronically, check payer eligibility in real time, and post ERA remittances. See how wound-care follow-up claims move from the note to the payer.

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Conclusion

Finger laceration follow-up visits generate a steady stream of preventable claim denials, and the cause is usually the same short list. Nail status gets read off the wrong character, the 7th character is wrong, or laterality is assumed rather than stated.

ICD-10 Code S61.210D is specific and billable, but it only holds up when all five documentation elements are explicit in the clinical note.

The single highest-value habit is naming the nail status in every wound-care note. That one sentence decides between S61.210D and S61.310D, and no amount of downstream claim scrubbing can recover it if the note is silent.

Pabau links structured ICD-10 documentation to electronic claim submission through Claim.MD, so follow-up codes reach the payer with their supporting data attached. Book a demo to see how your wound-care follow-ups would move from the note to the remittance.

Continue your research

Need to understand how claims clear the payer? Medical claims clearinghouse explained covers how electronic claims are validated, scrubbed, and routed to payers.

Seeing recurring denials on injury codes? Electronic remittance advice (ERA) explains how to read 835 files and trace denial reasons back to specific code errors.

Want to reduce billing errors across your practice? Best medical billing software for US practices reviews the tools that integrate ICD-10 validation into the claims workflow.

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