ICD-10 code S49.102G: Physeal fracture, subsequent encounter

Key Takeaways

ICD-10 code S49.102G is a billable FY2026 diagnosis code for an unspecified physeal fracture of the proximal humerus at a subsequent encounter with routine healing.

The 7th character ‘G’ specifically means the patient is in a follow-up visit and the fracture is healing normally – not nonunion (K) or sequela (S).

‘Unspecified’ means no Salter-Harris classification type was documented; use a more specific S49.10x code if the type is known.

Pabau’s claims management software helps orthopedic and physical therapy practices apply the correct 7th character and submit clean ICD-10 claims.

ICD-10 code S49.102G is a billable ICD-10-CM diagnosis code valid for the submission of HIPAA-covered transactions during fiscal year 2026. The full clinical description is: Unspecified physeal fracture of upper end of humerus, subsequent encounter for fracture with routine healing.

Code description and clinical meaning for unspecified physeal fracture of upper end of humerus

A physeal fracture is a break through the growth plate – the cartilaginous zone at the end of a long bone where new bone tissue is produced. In this case, the fracture involves the upper end (proximal end) of the humerus, the large bone of the upper arm. The proximal humerus includes the humeral head, the greater and lesser tubercles, and the surgical and anatomical necks.

The word “unspecified” in ICD-10 Code S49.102G means the treating provider did not document a Salter-Harris classification type. The Salter-Harris system categorizes physeal fractures from Type I (through the growth plate only) to Type V (crush injury of the growth plate). When imaging or clinical findings cannot confirm a specific type, coders use the unspecified code rather than implying a type that was never documented.

Physeal fractures of the proximal humerus occur predominantly in pediatric patients because open growth plates are weaker than surrounding bone during skeletal development. According to clinical orthopaedic literature referenced by the CDC/NCHS ICD-10-CM classification, growth plate injuries account for a significant proportion of all childhood fractures, with the shoulder being a common site after falls or sports contact. However, the code itself is not age-restricted – it may apply to any patient with an open growth plate and an unspecified physeal injury at the proximal humerus.

Approximate synonyms

The following terms are accepted clinical synonyms for the condition encoded by ICD-10 Code S49.102G. Coders may encounter any of these in provider notes:

• Growth plate fracture of the proximal humerus (subsequent encounter, routine healing)
• Epiphyseal fracture of the upper humerus, follow-up visit
• Salter-Harris fracture of the proximal humerus, unspecified type
• Physeal injury upper humerus, uncomplicated healing
• Proximal humerus growth plate fracture, subsequent encounter

Understanding the 7th character: What does “G” mean in an ICD-10 fracture code?

The 7th character is one of the most audit-prone elements in fracture coding. Assigning the wrong character – even with the correct base code – is a common denial trigger. For S49.102x, the base code S49.102 covers unspecified physeal fracture of the upper end of the humerus. The 7th character specifies the encounter type and healing status.

Per the ICD-10-CM Official Guidelines maintained by CMS, a “subsequent encounter” is any visit after the patient has received active treatment for the condition. The provider’s documentation must confirm the healing status – routine, nonunion, or malunion – to support whichever 7th character is assigned.

S49.102G vs S49.102K vs S49.102S: Sibling code comparison

Three sibling codes cover the most common coding decisions coders face at a fracture follow-up visit. Choosing incorrectly is a frequent audit finding. The table below summarizes the clinical distinction for each, drawing on the ICD List ICD-10-CM reference and official coding guidelines.

Coders often confuse G and D, since both describe routine healing at a subsequent encounter. The distinction lies in the underlying fracture type context within the ICD-10-CM tabular list – for physeal fractures in the S49 category, G is the active choice for routine healing follow-up visits. For accurate ICD-10 code documentation across specialties, always cross-reference the tabular instruction notes specific to the code family.

ICD-10-CM code hierarchy for S49.102G

Understanding where ICD-10 Code S49.102G sits in the classification hierarchy helps coders navigate related codes and understand when a more specific or broader code applies.

• S00-T88: Injury, poisoning and certain other consequences of external causes
• S40-S49: Injuries to the shoulder and upper arm
• S49: Other and unspecified injuries of shoulder and upper arm (non-billable header)
• S49.1: Physeal fracture of upper end of humerus (non-billable header)
• S49.10: Unspecified physeal fracture of upper end of humerus (non-billable header)
• S49.102: Unspecified physeal fracture of upper end of humerus, left humerus (non-billable – requires 7th character)
• S49.102G: Subsequent encounter for fracture with routine healing (billable)

The parent codes S49, S49.1, and S49.10 are non-billable header codes. Only the fully specified 7th-character codes are valid for claim submission. Coders working in sports medicine software should confirm that their EHR or practice management system appends the 7th character automatically rather than requiring manual entry, since missing or misplaced characters are a top denial cause in this code family.

Documentation requirements for S49.102G

Billing ICD-10 Code S49.102G without supporting documentation creates audit exposure. Three areas need to be covered in the clinical record before this code is submitted.

Encounter type confirmation

The record must confirm this is a subsequent encounter – not the first active treatment visit. A note referencing the original injury date, the prior treatment (cast, sling, surgical fixation), and the purpose of the current visit as follow-up evaluation satisfies this requirement. For guidance on structuring these notes accurately, safer clinical notes practices outline what elements constitute a compliant follow-up encounter record.

Healing status evidence

Routine healing must be affirmatively documented. Acceptable supporting evidence includes:

• Radiograph report noting callus formation, narrowing fracture line, or bridging bone
• Provider clinical notation: “healing well,” “fracture progressing as expected,” or equivalent language
• Physical exam findings consistent with resolving injury (decreasing pain, improving range of motion)

Absence of this documentation means the claim rests on an unsupported assertion of routine healing – a red flag during payer audits. Using patient record management that timestamps imaging reports alongside encounter notes reduces this gap significantly.

Laterality and specificity

S49.102G is coded for the left humerus based on the code’s position in the hierarchy (S49.102 = left). Before defaulting to the unspecified physeal fracture code, verify whether a Salter-Harris type was documented. If the provider specified Type I, II, III, or IV, a more specific S49.1x code exists and should be used instead. Digital intake forms that capture mechanism of injury and imaging findings at first presentation make this laterality and type verification faster at follow-up visits. For a broader view of how ICD-10 diagnostic code documentation principles apply across specialties, structured record-keeping is consistently the differentiating factor in clean claim submission.

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Clinical context: Proximal humerus physeal fractures and S49.102G

Proximal humerus physeal fractures most commonly result from falls on an outstretched hand, direct trauma to the shoulder, or contact sports injuries. The proximal humeral physis (growth plate) is one of the most rapidly growing plates in the body, which increases vulnerability during adolescent growth spurts.

Providers who see these injuries use the Ottawa ankle rules for fracture assessment as a methodological reference point for evidence-based injury triage – similar validated decision frameworks exist for shoulder injuries. For clinical documentation and ICD-10 coding across injury categories, the principle is consistent: the assessment finding must map directly to the code assigned.

The majority of proximal humerus physeal fractures in pediatric patients heal without surgical intervention. Conservative management – immobilization via sling or shoulder spica cast – is the standard for non-displaced or minimally displaced fractures. At the subsequent encounter (the visit encoded by ICD-10 Code S49.102G), the provider evaluates healing progress, updates the management plan, and documents the visit outcome. Physical therapists involved in rehabilitation follow-up may also encounter this code in their claims management software when billing for treatment during the healing phase.

Conclusion

Accurate use of ICD-10 code S49.102G depends on three things: confirming the encounter is a follow-up (not initial treatment), confirming the fracture is healing normally, and verifying that no Salter-Harris type was documented that would warrant a more specific code. Get those three elements right and the claim submits cleanly.

Pabau’s HIPAA-compliant clinic documentation tools connect imaging reports, encounter notes, and diagnosis codes in one record, so the supporting evidence for codes like S49.102G is always audit-ready. To see how Pabau handles ICD-10 code documentation and claims management for orthopedic and physical therapy practices, book a demo.

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