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ICD-10-CM Code

ICD code S42.294G – Other fracture lower end humerus

Billable Code Specific Code


Code Definition

S42.294G is the billable ICD-10-CM code for other nondisplaced fracture of upper end of right humerus, subsequent encounter for fracture with delayed healing. It is used at follow-up visits after active treatment, when the provider documents that the fracture is healing more slowly than expected.

The code sits in S42.29, which holds upper-end fractures outside the named types, such as anatomical neck and articular head fractures. The 7th character G marks a follow-up visit where healing is delayed. Routine healing takes D, nonunion takes K, and residual effects after healing take S.

Chapter
S00-T88 Injury, poisoning and certain other consequences of external causes
Category
S42 Fracture of shoulder and upper arm
Group
S42.294 Other nondisplaced fracture of upper end of right humerus
Billable
Yes
Code also known as
Nondisplaced fracture of anatomical neck of right humerus, delayed healing; nondisplaced fracture of articular head of right humerus, delayed healing
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Key takeaways

Key takeaways

S42.294G reports a follow-up visit for an other nondisplaced fracture of the upper end of the right humerus that is healing more slowly than expected.

The 7th character G means subsequent encounter with delayed healing, while sequela is S, nonunion is K and malunion is P.

The note has to support three facts: the right side, a nondisplaced fracture, and the provider’s statement of delayed healing.

S42.294G can be the first-listed diagnosis at a delayed-healing follow-up, because the fracture itself is the reason for the visit.

Fractures of the lower end of the humerus, near the elbow, belong in S42.4- and never in S42.29-.

ICD-10 Code S42.294G: quick code reference

ICD-10 Code S42.294G is the billable code for an other nondisplaced fracture of the right upper humerus with delayed healing, at a subsequent encounter. It is used after active treatment has ended, at follow-up visits where the provider documents that the fracture is healing more slowly than expected.

ElementValue
CodeS42.294G
Official descriptorOther nondisplaced fracture of upper end of right humerus, subsequent encounter for fracture with delayed healing
Billable and specificYes, valid for claims as written
Chapter19, S00-T88 Injury, poisoning and certain other consequences of external causes
CategoryS42 Fracture of shoulder and upper arm
SubcategoryS42.29 Other fracture of upper end of humerus
6th character 4Nondisplaced fracture, right humerus
7th character GSubsequent encounter for fracture with delayed healing

The code titles above match the CMS ICD-10-CM code tables for the S42.29 family. Every element has to be supported by the note, from the side of the body to the healing status.

What counts as an other fracture of the upper end of the humerus

The upper end of the humerus is the proximal part of the bone, at the shoulder. ICD-10-CM splits S42.2 into named fracture types, and S42.29 holds the upper-end fractures that fit none of them.

  • S42.21- to S42.24-: fractures of the surgical neck, including two-part, three-part and four-part fractures.
  • S42.25- and S42.26-: fractures of the greater tuberosity and the lesser tuberosity.
  • S42.27-: torus fractures of the upper end of the humerus.
  • S42.29-: other fractures, which the tabular list indexes to include fractures of the anatomical neck and the articular head.

Several neighboring sites sit outside S42.29 entirely. Fractures of the shaft of the humerus are coded in S42.3-, and fractures of the lower end, near the elbow, are coded in S42.4-. Physeal fractures of the upper end, which involve the growth plate in children, are coded in S49.0-.

One default rule in the tabular list matters for this code. A fracture not documented as displaced or nondisplaced is coded as displaced. So S42.294G needs the word nondisplaced, or an equivalent description, in the record.

What the 7th character G means for S42.294

The 7th character G means subsequent encounter for fracture with delayed healing. It applies once active treatment has ended and the patient returns while the fracture is still healing, more slowly than expected.

7th characterFull codeWhen it applies
AS42.294AInitial encounter for a closed fracture, during active treatment
BS42.294BInitial encounter for an open fracture, during active treatment
DS42.294DSubsequent encounter, fracture healing on schedule
GS42.294GSubsequent encounter, fracture healing more slowly than expected
KS42.294KSubsequent encounter, fracture documented as a nonunion
PS42.294PSubsequent encounter, fracture documented as a malunion
SS42.294SSequela, a residual condition after the fracture has healed

G sits between D and K on the same healing timeline. D says healing is on track, G says healing is slow, and K says healing has stopped. The grid below shows where S42.294G sits among its sibling codes and the seven characters.

Grid of the six S42.29 codes by displacement and side
D, G, K and P all mark follow-up visits, and only G records healing that is slower than expected. Source: CMS ICD-10-CM code titles for S42.291 to S42.296.

A residual problem after the fracture has healed, such as shoulder stiffness, takes the sequela character. It is reported with S42.294S rather than with G.

Pro Tip

Let the provider’s documentation decide the character. No ICD-10-CM rule turns a fracture into delayed healing after a set number of weeks, so G needs the provider to document it. Query the provider when imaging looks slow but the note is silent.

Clinical scenarios: when S42.294G is the right code

S42.294G fits when three conditions hold at the same visit. Active treatment has ended, the fracture is still healing, and the provider documents that healing is delayed.

  • A patient’s nondisplaced right anatomical neck fracture, treated in a sling, shows sparse callus at follow-up, and the provider documents delayed union. Code S42.294G.
  • The same patient returns and the fracture is healing on schedule. Code S42.294D.
  • Serial x-rays show healing has stopped, and the provider documents a nonunion. Code S42.294K.
  • The fracture has healed in a poor position, and the provider documents a malunion. Code S42.294P.
  • The fracture has healed, but the patient returns with shoulder stiffness caused by it. Code the stiffness first, then S42.294S.
  • The delayed-healing fracture is in the left humerus. Code S42.295G instead.

Complications of surgical treatment, such as a failed fixation device, take complication codes instead of the G character. Those cases are rare for a nondisplaced fracture, but the distinction still applies.

The six S42.29 codes split on two facts: whether the fracture is displaced and which arm it involves. Each one takes the same seven 7th characters.

CodeDescriptorUse when
S42.291GOther displaced fracture of upper end of right humerus, delayed healingThe right-sided fracture is displaced
S42.292GOther displaced fracture of upper end of left humerus, delayed healingThe left-sided fracture is displaced
S42.293GOther displaced fracture of upper end of unspecified humerus, delayed healingThe fracture is displaced and no side is recorded
S42.294GOther nondisplaced fracture of upper end of right humerus, delayed healingThe right-sided fracture is documented as nondisplaced
S42.295GOther nondisplaced fracture of upper end of left humerus, delayed healingThe left-sided fracture is documented as nondisplaced
S42.296GOther nondisplaced fracture of upper end of unspecified humerus, delayed healingThe fracture is nondisplaced and no side is recorded

Check displacement against the imaging report before you check side. An imaging report that mentions any displacement moves the code to S42.291G, even when the office note calls the fracture minor.

Documentation requirements for S42.294G

The record has to support every character in the code. Payers look for four elements in the note for the visit being billed.

  • Site: an upper-end fracture outside the named types, such as the anatomical neck or the articular head.
  • Side and displacement: the right humerus, described as nondisplaced.
  • Phase of care: active treatment has ended, and this is a follow-up visit during healing.
  • Delayed healing: the provider states that healing is slower than expected, ideally with the imaging finding behind it.

A note that says only “fracture follow-up, doing well” supports S42.294D rather than S42.294G. A note that describes slow healing without naming the side cannot support any right-sided code.

Common denial reasons for S42.294G and how to correct them

Most S42.294G denials trace back to a mismatch between the code and the note. Each one has a clear fix.

Denial reasonRoot causeCorrective action
No delayed healing in the noteThe note describes routine healing, but the claim carries GRecode to S42.294D, or query the provider if imaging suggests slow healing
Nonunion billed as delayed healingThe provider documented a nonunion, but the claim still carries GRecode to S42.294K and resubmit with the note
Side mismatchThe note documents the left humerusRecode to S42.295G, and use S42.296G only when no side is recorded
Displacement mismatchThe imaging report describes displacementRecode to S42.291G
Wrong subcategoryThe fracture is at the surgical neck, a tuberosity, or the lower endMove to S42.21- to S42.24-, S42.25-, S42.26- or S42.4- as documented
Bone stimulator not coveredAn ultrasonic stimulator is billed to Medicare on a G claimMedicare covers it only for documented nonunion, so confirm a K diagnosis first

Strong denial management workflows catch most of these before submission. When a denial does arrive, attach the note that supports the corrected 7th character, side and displacement.

The guide to denial codes in billing explains the reason codes that come back with these rejections. It also helps to keep each correction in line with medical billing compliance requirements.

CPT codes commonly paired with S42.294G

A delayed-healing visit usually involves an evaluation, repeat imaging and therapy. The pairings below are typical, and each one needs its own support in the note.

CPT codeDescriptionMedical necessity note
99213-99214Office or other outpatient visit, established patientFollow-up to assess healing, with the level set by medical decision making or time
73030Radiologic examination, shoulder; complete, minimum of 2 viewsSerial imaging that shows slow callus formation supports the G
73060Radiologic examination, humerus; minimum of 2 viewsUsed when the provider needs the whole humerus imaged
97161-97163Physical therapy evaluation, low, moderate or high complexityNeeds a plan of care tied to the fracture, supported by the therapist’s documentation
97110Therapeutic exerciseRange-of-motion work within the provider’s restrictions while the fracture heals
20979Low intensity ultrasound stimulation to aid bone healing, noninvasiveMedicare covers ultrasonic stimulation for nonunion, not for delayed union

The last row is where G and K stop being interchangeable. Under Medicare NCD 150.2, ultrasonic bone stimulators stay noncovered for fresh fractures and delayed unions.

Medicare treats a long-bone fracture as a nonunion only after serial radiographs show healing has stopped for at least three months. Until then, a stimulator claim on S42.294G is likely to be denied.

ICD-10-CM guidelines that govern S42.294G

The ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19, set the rules for injury and fracture codes. Five of them shape how S42.294G is used.

  • Phase of care: A is for active treatment, while D, G, K and P cover visits during the healing or recovery phase.
  • No aftercare Z codes: aftercare for an injury is reported with the injury code and its subsequent-encounter character, not a Z code.
  • Defaults: a fracture not documented as displaced is coded as displaced, and one not documented as open is coded as closed.
  • Surgical complications: complications of fracture surgery during healing take complication codes rather than G.
  • External cause codes: Chapter 20 codes are optional, and when used they carry the same 7th character as the injury.

The CDC/NCHS ICD-10-CM browser tool shows the current tabular list and index entries for S42.29. Coders who check it each October catch annual changes before they reach the revenue cycle.

Pro Tip

When delayed healing becomes a nonunion, change the 7th character on the next claim, not the earlier ones. Each claim reflects what the provider documented at that visit, so the earlier G claims stay correct.

How Pabau keeps S42.294G claims moving from note to payer

Delayed healing stretches a fracture episode across several follow-up visits, and each visit produces its own claim. When the note lives in one system and the claim in another, the claim can drift from the note.

Pabau, the practice management platform we build for medical practices, keeps the clinical note, the appointment and the claim in the same patient record. Your coder reads the delayed-healing statement and the imaging result in the record they bill from.

Our claims management software then submits the claim electronically through Claim.MD, our US clearinghouse partner. It tracks each claim status and remittance in the same place, while the code choice stays with your coder.

Keep fracture follow-up claims in one record

Pabau keeps the clinical note, the appointment and the claim together, then submits through Claim.MD and tracks each response. Your team follows every S42.294G visit from note to payment.

Pabau claims management dashboard

Conclusion

S42.294G is a narrow code. It describes a right-sided, nondisplaced upper-end humerus fracture that is still healing, only more slowly than it should. The 7th character carries most of the billing risk, because D, G and K describe three points on the same timeline.

Let the provider’s documented healing status pick the character, and recode as soon as that status changes. That habit keeps each claim aligned with its note and keeps stimulator claims off a delayed-union diagnosis. Book a demo to see how Pabau keeps fracture follow-up notes and claims in one record.

Continue your research

Continue your research

Need a reference for handling denied orthopedic claims? Denial management in healthcare walks through root-cause analysis and appeal workflows for common musculoskeletal billing denials.

Want to understand the clearinghouse that processes your fracture claims? How Claim.MD works as a clearinghouse explains real-time eligibility, ERA remittances, and CARC denial codes in plain language.

Looking to strengthen your overall billing accuracy? What is medical billing covers the end-to-end claim lifecycle from encounter to payment posting.

Frequently asked questions

What does ICD-10 code S42.294G mean?

ICD-10 code S42.294G means other nondisplaced fracture of upper end of right humerus, subsequent encounter for fracture with delayed healing. It is reported at follow-up visits after active treatment, when the provider documents that the fracture is healing more slowly than expected.

What does the 7th character G mean for S42.294?

The 7th character G means subsequent encounter for fracture with delayed healing. It applies after active treatment has ended, once the provider documents slower healing than expected. Routine healing takes D, nonunion takes K, and malunion takes P.

When should I use S42.294G instead of S42.294D?

Use S42.294D when the fracture is healing on schedule at a follow-up visit. Switch to S42.294G only when the provider documents delayed healing, usually backed by imaging that shows less callus than expected. Without that statement in the note, D is the supported code.

Why would a claim with S42.294G be denied?

Most denials come from a mismatch between the code and the note. Common causes are a G with no documented delayed healing and the wrong side or displacement. Another is a bone stimulator, which Medicare covers only for documented nonunion.

Can S42.294G be the first-listed diagnosis on a claim?

Yes. At a follow-up visit for delayed healing, the fracture is the reason for the encounter, so S42.294G can be listed first. The sequela rule that puts the residual condition first applies only to the 7th character S.

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Despina Petrushevska
Content Writer

Despina Petrushevska is a content writer covering aesthetics, dermatology, and clinic operations, known for making detailed clinical concepts clear and engaging. Outside of work, she enjoys photography, weekend getaways, and finding inspiration in everyday experiences.
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