ICD code S62.101A – Fracture of unspecified carpal bone

Key takeaways

S62.101A is a billable ICD-10-CM code for a fracture of an unspecified carpal bone of the right wrist, initial encounter, closed.

The 7th character A designates active treatment. Use D, G, K, P or S once the patient moves into follow-up or sequela care.

Document which carpal bone is fractured whenever imaging supports it, because S62.101A applies only when the bone is unidentified.

Laterality is never assumed, so a left wrist takes S62.102A and an undocumented side takes S62.109A.

Practice management software like Pabau captures laterality and encounter type in the note, so the coder never has to query it.

ICD-10 Code S62.101A: definition and billable status

ICD-10 Code S62.101A is the diagnosis code for a fracture of an unspecified carpal bone of the right wrist. The 7th character A marks an initial encounter for a closed fracture. The code applies when the record documents a carpal fracture without naming which of the eight bones is involved.

The code is billable and valid for HIPAA-covered transactions in fiscal year 2026, which took effect on October 1, 2025. S62.101A sits in chapter 19 of ICD-10-CM, covering injury, poisoning, and certain other consequences of external causes.

Two details decide whether the code holds up under a payer review. The 7th character has to match the stage of care, and the carpal bone has to be genuinely unidentified in the record.

S62.101A code details at a glance

The table below summarizes the key reference data for S62.101A that coders and billers need at the point of claim submission.

Per the CMS ICD-10 codes page, this code remains valid and unchanged for FY2026. Billers should verify payer-specific coverage policies before submission, since reimbursement eligibility depends on documentation and payer rules, not the code’s billable status alone.

Code hierarchy and classification

S62.101A sits seven levels deep within the ICD-10-CM tabular hierarchy. Understanding the parent chain helps coders choose between specificity levels when documentation supports a more precise code.

The parent code S62.1 covers fractures of other and unspecified carpal bones, whatever the laterality or encounter type. Once the record establishes the right wrist and an initial, closed encounter, S62.101A becomes the only correct selection. ICD-10-CM guidelines require coding to the lowest level of specificity the documentation supports.

Understanding the 7th character in S62.101A

The 7th character is a frequent source of fracture coding errors. Submitting “A” when the patient has moved into a subsequent-care phase will trigger a denial, and submitting “D” during active surgical management is equally wrong. The table below defines each 7th character available for S62.101.

“Initial encounter” means the patient is receiving active treatment, not that this is literally their first visit. A patient transferred to a specialist two weeks after the injury for ORIF is still coded with “A”, because active surgical treatment is being delivered. The same distinction runs through every trauma code in ICD-10-CM.

Clinical description: fracture of unspecified carpal bone

The carpal region contains eight small bones arranged in two rows. The proximal row includes the scaphoid, lunate, triquetrum, and pisiform. The distal row contains the trapezium, trapezoid, capitate, and hamate.

“Unspecified carpal bone” applies when imaging or clinical documentation does not identify which of these eight bones is fractured. This happens most often in the emergency department, when initial radiographs are inconclusive. It also happens when the provider documents only “wrist fracture” without naming the bone. The choice follows the documentation rather than coder preference.

• Closed fracture: the skin over the fracture site is intact; there is no wound communicating with the fracture. This is the default assumption when documentation does not state “open fracture.”
• Right wrist laterality: code S62.101A is specific to the right side. Left wrist uses S62.102A; unspecified laterality uses S62.109A.
• Clinical presentation: pain, swelling, tenderness over the dorsal or volar wrist; reduced range of motion; possible visible deformity.
• Imaging: standard wrist X-ray (PA, lateral, oblique views); CT or MRI may be required when plain film is inconclusive, particularly for occult scaphoid fractures.

When subsequent imaging or specialist review identifies the specific bone, the code should be updated to the named-bone equivalent (for example, S62.001A for scaphoid). Leaving the code as “unspecified” when documentation supports specificity is a coding error under ICD-10-CM guidelines.

Coding guidelines for S62.101A

The ICD-10-CM Official Guidelines for Coding and Reporting (FY2026) set out several rules that decide how S62.101A is assigned and sequenced. Practices treating orthopedic and physical therapy patients should build these into their documentation templates. Getting them wrong is one of the more avoidable causes of a rework cycle in denial management.

• Active treatment rule: Use “A” for any encounter where the provider is actively managing the fracture. That covers initial casting, reduction, surgical fixation, and specialist consultations during the acute phase.
• Specificity rule: Code to the highest level of specificity documented. If the operative report names the lunate as the fractured bone, update to the lunate-specific code rather than retaining S62.101A.
• Laterality rule: Never default to unspecified laterality (S62.109A) when the patient record identifies the right or left wrist.
• Open vs. closed: The distinction between open and closed fracture is a clinical determination made by the treating provider, not the coder. If documentation is silent, closed is the default per ICD-10-CM guidelines.
• Additional codes: Code the cause of injury using an external cause code (W-codes for falls, X-codes for other mechanisms) as a secondary code. Some payers require this for trauma claims.
• Sequencing: When S62.101A is the reason for the encounter, it is sequenced as the principal diagnosis. When the patient is admitted for a complication of the fracture (such as compartment syndrome), that complication becomes the principal diagnosis and S62.101A is secondary.

Those rules stack in a fixed order, so the code falls out of what the note already documents. The path below runs the three questions in sequence and lands on S62.101A.

Related ICD-10-CM codes for carpal bone fracture

Coders working wrist fracture cases meet the sibling and parent codes in the S62.1 family constantly. The table below covers the codes referenced most often alongside S62.101A. It helps when a payer queries laterality or encounter type. The full ICD-10-CM code index carries the rest of the chapter.

ICD-9-CM crosswalk for S62.101A

Practices working legacy data, audits, or payer reconciliations that reference pre-2015 claims will meet ICD-9-CM codes. The crosswalk below is approximate, because ICD-9-CM carried no laterality or encounter-type specificity for carpal fractures. For audit or research work, check the mapping against the CMS General Equivalence Mapping files.

CPT codes associated with S62.101A

S62.101A is a diagnosis code; it does not describe a procedure. The CPT codes submitted alongside it depend on what treatment the provider performs. The associations below represent commonly paired procedural codes, but payer coverage and bundling rules vary. Verify with the treating provider’s documentation before selecting CPT codes. According to the AAPC ICD-10-CM code reference, the procedural crosswalk depends on clinical context.

The CDC/NCHS ICD-10-CM web tool does not provide CPT crosswalks directly. Use the AAPC or CMS Physician Fee Schedule for procedure-diagnosis pairing and medical necessity documentation requirements.

How Pabau supports accurate fracture coding and documentation

Coding errors on wrist fracture claims usually start upstream, during documentation. When the encounter note misses laterality, fracture type, or the stage of treatment, the coder has to assign a less specific code. The alternative is a query that delays billing. Practice management software like Pabau connects the note to the claim, and its claims software for orthopedics carries that detail straight through to submission.

Practices using Pabau can build structured note templates that prompt the provider to record laterality, fracture classification, and encounter type at the point of care. Those fields are captured before the note is signed, so coders receive a complete record instead of chasing a clarification afterward.

For claim submission, Pabau integrates with Claim.MD to send fracture claims electronically to thousands of US payers. Eligibility verification before the encounter reduces the risk of submitting S62.101A against an inactive or non-covered plan. Electronic remittance advice then flows back into Pabau automatically, so denial reasons appear without a trip to a separate clearinghouse portal.

For practices handling high volumes of trauma and musculoskeletal claims, catching a missing detail before submission costs far less than working the denial afterward. The saving compounds across every fracture claim the practice files in a year.

Reduce fracture coding errors at the source

Structured clinical documentation and an integrated claims workflow help orthopedic and physical therapy practices capture laterality, encounter type, and fracture classification. Every detail lands before the note is signed.

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Conclusion

S62.101A earns its place on a claim only when the record genuinely cannot name the fractured carpal bone. Where the operative report or the radiology read does name it, the specific code is the correct one. Leaving S62.101A in place invites a query. Treat the unspecified code as a documentation signal, not a default.

Practices that hold a low denial rate on trauma claims are the ones that fixed the note. Speed at appeals is a poor substitute. Structured encounter templates and a clearinghouse connection do that work once, at the point of care. Book a demo to see how Pabau captures laterality and encounter type before a fracture claim ever leaves the practice.

Continue your research

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Managing denials on orthopedic claims? Denial codes in medical billing explains the most common CARC denial reasons and how to appeal them.

Want to understand how ERA files reduce reconciliation time? Electronic remittance advice explains 835 file processing and how ERAs automate payment posting.

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