ICD code S62.181G – Displaced fracture of trapezoid [smaller multangular]

Key takeaways

S62.181G is the ICD-10 code for a displaced fracture of the trapezoid bone in the right wrist, at a subsequent encounter with delayed healing.

The 7th character G means delayed healing. Nonunion is a separate character, K, so the nonunion code for this fracture is S62.181K.

Laterality sits in the sixth digit. S62.181 is the right wrist, S62.182 is the left, and S62.183 covers a wrist the record never names.

The S62 category takes only seven 7th characters, so the Gustilo characters E, F, H and J never appear on a carpal code.

Practice management software like Pabau carries a verified code from the chart to the claim, so no one re-keys it into a separate billing tool.

S62.181G is a complete code you submit as written

S62.181G is a complete, billable ICD-10-CM diagnosis code. Seven characters is the full length for this subcategory, so you submit it exactly as written.

The table below is the code’s official identity, taken from the current tabular list.

Two of those rows matter more than the rest. The laterality row rules out any note that fails to name a side, and the 7th character row rules out nonunion.

You can confirm both against the CDC/NCHS ICD-10-CM web tool, which mirrors the official CMS tabular list.

Every character carries one clinical fact

No character in this code is filler. Read it left to right and each position narrows the diagnosis, from the chapter down to the healing status at this visit.

The sixth digit is the one that trips people up, because it does two jobs at once. It tells the payer the fragments moved and it tells the payer which wrist. Lose either fact from the note and the code no longer matches the chart.

Laterality lives in the sixth digit, not the 7th character

S62.181 is always the right wrist. It is never an unspecified-wrist code, and no 7th character changes that.

Coders who learned the S62.18 family as a single block of unspecified codes will misread the whole run. Map the sixth digit once and keep it somewhere you can see it.

• S62.181- displaced trapezoid fracture, right wrist
• S62.182- displaced trapezoid fracture, left wrist
• S62.183- displaced trapezoid fracture, unspecified wrist
• S62.184- nondisplaced trapezoid fracture, right wrist
• S62.185- nondisplaced trapezoid fracture, left wrist
• S62.186- nondisplaced trapezoid fracture, unspecified wrist

Here is how that plays out in practice. A patient returns nine weeks after a fall, and the surgeon writes that the displaced right trapezoid fracture shows callus but has not consolidated.

Right wrist gives you the sixth digit 1. Displaced keeps you in the S62.181 run, and healing that is slow but present gives you the G character. So the code is S62.181G. No laterality modifier is needed on a diagnosis line.

Reserve S62.183G for the case where no source in the record names a side. That is rare in hand surgery, since imaging reports label laterality by default.

Auditors treat a run of unspecified-wrist codes as a documentation problem rather than a coding preference.

The trapezoid sits where fractures get missed

The trapezoid hides from a plain radiograph, which is why its fractures get picked up late. It is the smallest bone in the distal carpal row, wedged between the trapezium, the capitate and the base of the second metacarpal.

Isolated trapezoid fractures are uncommon. They usually follow an axial load driven up through the index finger metacarpal, or a crush injury that catches the whole distal row.

The shielding matters for coding, not just for anatomy. A first visit often gets coded to a broader wrist injury, because the trapezoid only shows up once CT or MRI confirms it.

A fracture that spent weeks unrecognized is also the one most likely to be healing behind schedule. Charts reach the G character that way.

Chart notes and operative reports use several names for the same bone. Any of these support a code in the S62.18 subcategory:

• Trapezoid bone, the standard anatomical term
• Smaller multangular, the older name that ICD-10-CM keeps in brackets
• Os trapezoideum, occasionally used in radiology reports
• Distal row carpal fracture, when the report also names the trapezoid

G means delayed healing, and K means nonunion

The 7th character G means subsequent encounter for fracture with delayed healing. It does not mean nonunion.

Delayed healing describes a fracture that is still uniting, just slower than the timeline the surgeon expected. Nonunion describes a fracture where union has stopped, and that is character K.

So the wording in the follow-up note picks the character for you. The diagram below maps four ways a surgeon might describe the healing onto the four codes they produce.

S62.181 accepts seven 7th characters in total. Every one of them is listed below, with the complete code it produces.

Notice what the table does not contain. There is no E, F, H or J here. Those characters carry Gustilo open-fracture classifications, and ICD-10-CM applies them to long-bone categories such as the forearm, the femur and the lower leg.

Carpal fractures under S62 never use them. A lookup tool offering you S62.181H is showing a code that does not exist.

Three questions come up on almost every audit of this code:

• Is G ever right for a fracture that stopped healing? No. That is nonunion, and it takes K.
• Does G mean the patient came in for a routine check? No. Routine healing at a follow-up visit is D.
• Is there a G for an open trapezoid fracture? Open versus closed is captured once, at the initial encounter, by A or B. The subsequent characters do not repeat that distinction.

Where S62.181G sits in the ICD-10-CM tree

Walking up the hierarchy is the fastest way to spot a code that almost fits. Each level above S62.181G carries notes and exclusions that apply to the code itself, so the parents are worth reading before you commit.

Three notes from those parent levels change how you code. S62 instructs that a fracture not described as displaced or nondisplaced is coded to displaced. The same note sends an undescribed fracture to closed rather than open.

S62 also excludes traumatic amputation of the wrist and hand, which belongs to S68. S62.1 excludes scaphoid fractures, which sit in their own subcategory at S62.0.

The chapter adds one more instruction. Report a secondary code from Chapter 20 to identify the cause of the injury, and add Z18 if a foreign body was retained. Annual tabular updates are published on the CMS ICD-10 codes page.

The related trapezoid codes you will reach for next

Fracture care moves through several codes as healing progresses, and the trapezoid family follows that arc closely.

Keep this run visible while you work a follow-up visit, because the difference between two of these rows is a single character.

Denials in this family cluster around two rows, S62.181D and S62.181G, because a slow-healing fracture still looks like a routine check on the schedule.

If a payer rejects the pairing, our guide to reading denial codes tells you what the reason code is asking for before you resubmit.

Displaced is the default when the chart stays silent

If the provider never says displaced or nondisplaced, you code displaced. That instruction sits in the tabular list under S62, so it is not a house rule or a payer preference.

Nondisplaced works the other way and has to be earned. The provider must state it, or the imaging report must, before you move to the S62.184 run.

Note the spelling ICD-10-CM uses. The official descriptions read nondisplaced as one word, so a search for non-displaced in some lookup tools returns no results.

That small mismatch sends coders back to the broader carpal codes when the specific one was sitting right there.

What the chart must say before you code S62.181G

Delayed healing is a physician’s finding, never a coder’s inference. Five facts have to be present in the record, and each one maps to a specific part of the code.

• The trapezoid is named as the fracture site. Imaging or an operative report has to identify the bone. A general wrist fracture note supports only the unspecified carpal codes at S62.10.
• The right wrist is documented. If the note says left, use S62.182G. If no source in the record names a side, S62.183G is the correct choice.
• Displacement is stated or left unstated. Either supports S62.181G, since displaced is the default. An explicit nondisplaced finding moves you to S62.184G.
• This visit is a subsequent encounter. Active fracture treatment has ended and the patient is in aftercare. Purpose of the visit decides this, not the number of weeks elapsed.
• Delayed healing is described as such. Serial imaging showing slow but continuing union works, as does a provider statement that consolidation is behind schedule. A note saying healing has stopped is nonunion, so code S62.181K.

When the language sits between two of these, query the provider rather than picking the closer character. A one-line clarification costs far less than an appeal.

Run this check before you submit the claim

An S62.181G denial is usually preventable in the moments before the claim goes out. The visit note gets finalized, the diagnosis pointer gets set, and the claim moves to the clearinghouse.

Here is what to confirm at that point.

• The note for this visit describes delayed healing, in the provider’s own words.
• The 7th character came from this encounter, not from a template that carried A or D forward.
• The side in the note matches the side in the code, and any RT modifier on a procedure line agrees with both.
• The diagnosis has all seven characters. A six-character S62.181 fails clearinghouse edits as an incomplete code.
• If you reported an external cause code at the initial visit, switch it to its subsequent-encounter form for this one.
• Place of occurrence and activity codes stay behind. Guidelines assign those once, at the initial encounter only.

That last item is worth flagging to whoever built your encounter templates. Carrying Y92 and Y93 codes into every follow-up is a quiet, repeated error. It shows up across a whole fracture panel rather than on one claim.

Template fixes are easier with the claim form in front of you. On a professional claim the diagnosis sits in box 21, and box 24E points each service line at it. Our CMS-1500 claim form guide covers all 33 numbered fields.

Six mistakes that get the claim denied

The same handful of errors accounts for most rejections on this code. Each one has a short fix.

• Reading G as nonunion. G is delayed healing. Nonunion is K, and the two describe different clinical states.
• Treating S62.181 as an unspecified-wrist code. The sixth digit 1 means right. Unspecified wrist is the S62.183 run.
• Reaching for E, F, H or J. Those Gustilo characters belong to long-bone categories. S62 offers only A, B, D, G, K, P and S.
• Submitting S62.181 with no 7th character. The code is incomplete at six characters and will be rejected before a payer ever sees it.
• Leaving A on the claim after active treatment ended. Once the patient is in aftercare, the character has to move to D, G, K or P.
• Coding nondisplaced from soft imaging language. Minimal displacement is not the same as nondisplaced, and the default still sends you to S62.181G.

Notice that five of the six are documentation problems wearing a coding costume. Fix them at the point the note is written and the claim side gets quiet.

How Pabau keeps a verified code from being re-keyed

Getting the character right is only half the job. In many practices the diagnosis lives in the chart, then someone types it again into a separate billing tool. Every re-entry is another chance for G to become K, or for a right wrist to become a left one.

Practice management software like Pabau keeps both sides in one record. The diagnosis is captured where the note is written, and the claim picks it up from there. Pabau’s built-in claims management carries ICD-10 and CPT catalogs, real-time eligibility checks and 837P submission to US payers through Claim.MD, our clearinghouse partner.

Remittances post back to the same record, so a denial on a fracture follow-up sits next to the note that produced it. For orthopedic and hand surgery practices, that shortens the trip from a documentation query to a corrected claim. Aftercare visits stop aging quietly in a worklist.

Keep fracture follow-up claims moving

Pabau connects your coding workflow to Claim.MD for electronic submission to US payers. Built-in ICD-10 and CPT catalogs, real-time eligibility and ERAs cut manual entry, so aftercare claims reach the payer with the character you verified.

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Conclusion

S62.181G states four facts at once. The trapezoid is fractured, the fragments are displaced, the wrist is the right one, and this follow-up found healing behind schedule.

Check all four against the note before the claim leaves and most denials on this code never happen. Watch the 7th character hardest, since G and K sit one line apart in every lookup tool.

When coders and billers work in two separate systems, that hand-off is where accuracy gets lost. Pabau keeps the diagnosis, the claim and the remittance in one patient record instead.

To see how that fits your fracture follow-up workflow, book a demo.

Continue your research

Need guidance on denial resolution for fracture claims? Denial management in healthcare covers how to identify, appeal, and prevent the most common claim denial patterns across injury codes.

Looking to understand the clearinghouse submission process? How a medical claims clearinghouse works explains EDI submission, ERA processing, and payer enrollment in plain language.

Want a broader overview of fracture coding and billing workflows? What is medical billing? walks through the end-to-end revenue cycle from code assignment to payment posting.

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