CPT Code 29075: Short arm cast billing, RVUs and modifiers

CPT Code 29075 is the billing code for application of a short arm cast, running from the elbow to the fingers. It immobilizes the wrist and distal forearm after fractures, sprains, and surgery. Medicare pays $97.53 for it in a non-facility setting and $58.79 in a facility, on a 0-day global period.

This reference covers the official descriptor, 2026 reimbursement, modifiers, ICD-10 pairings, global period rules, documentation requirements, and the errors that get the code denied.

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Key takeaways

CPT Code 29075 covers application of a cast from elbow to finger, known as a short arm cast.

The 2026 Medicare national payment is $97.53 in a non-facility setting and $58.79 in a facility.

The code carries a 0-day global period, so no preoperative or postoperative services are bundled into it.

Cast application is bundled into same-day definitive fracture care by the same provider, which is a frequent denial.

Practice management software like Pabau prompts for the LT or RT modifier before the claim leaves the practice.

CPT Code 29075: Definition and official descriptor

CPT Code 29075 is defined by the American Medical Association (AMA) as “Application, cast; elbow to finger (short arm).” It sits in the Body and Upper Extremity Application of Casts category, codes 29000 to 29086. That family runs from the thorax down through the hand and fingers.

The procedure applies a fiberglass or plaster cast that begins at or just below the elbow and ends at the base of the fingers. It immobilizes the wrist and distal forearm while leaving the elbow mobile. That anatomical scope is what separates 29075 from the codes either side of it.

Clinical indications for a short arm cast

CPT 29075 is appropriate when a short arm cast is the clinically indicated immobilization method for wrist and distal forearm injuries. Medical necessity must be documented in the clinical record before billing. Common indications include:

• Distal radius fractures (including Colles and Smith fracture patterns) requiring external immobilization
• Carpal bone fractures (scaphoid, lunate, triquetrum) where stable immobilization is the treatment plan
• Wrist sprains and ligamentous injuries with significant instability or patient non-compliance with splinting
• Post-surgical immobilization of the wrist or distal forearm following open reduction or carpal tunnel release
• Salter-Harris fractures of the distal radius in pediatric patients requiring circumferential immobilization

This code is typically billed by orthopedic surgeons, hand surgeons, emergency physicians, and physiatrists. Payer policies vary on which specialties qualify as authorized providers, so check your local coverage determinations before billing.

CPT Code 29075 reimbursement rates and RVUs

Reimbursement for CPT Code 29075 comes from the CMS Physician Fee Schedule, which prices every code through relative value units (RVUs).

Rates vary by setting and by Medicare Administrative Contractor (MAC) locality. Check your own locality in the CMS Physician Fee Schedule Look-Up Tool before submitting, since the figures update every January.

RVU breakdown for CPT 29075

The total RVU has three components: work RVU (wRVU), practice expense RVU (PE RVU), and malpractice RVU. Multiplying the total by the 2026 conversion factor of roughly $33.40 produces the national payment in the last row.

Medicare and commercial payer fee schedules

The 2026 Medicare national payment for CPT Code 29075 is $97.53 in a non-facility setting and $58.79 in a facility. Geographic Practice Cost Indices then adjust that figure by locality. High-cost areas such as San Francisco and New York pay above it, and rural localities pay below.

Almost the whole difference between the two settings sits in practice expense. The non-facility PE RVU of 2.03 pays for the casting materials and the staff time your practice carries. In a facility the hospital supplies both, the PE RVU drops to 0.87, and the payment falls by about 40%.

Commercial payer rates are negotiated separately and usually sit above Medicare. Verify contracted rates payer by payer rather than assuming Medicare equivalency, because a single cast code can vary by tens of dollars across three contracts.

Modifiers for CPT Code 29075

Modifier selection for CPT Code 29075 directly affects claim acceptance. Applying the wrong modifier, or omitting one when it is required, is one of the most common causes of denial for cast application services. The table below covers the modifiers that apply to this code and the scenarios that trigger each.

ICD-10 codes commonly paired with CPT Code 29075

Every CPT 29075 claim needs a supporting ICD-10-CM diagnosis code that establishes medical necessity. Payers cross-check the pairing, and a mismatch is a common denial source. The codes below are the diagnoses most often paired with a short arm cast.

Use the seventh character correctly: “A” for initial encounter, “D” for subsequent encounter, “S” for sequela. Submitting an initial-encounter code on a follow-up visit triggers medical review flags with most MACs.

Global period and bundling rules for CPT 29075

CPT Code 29075 carries a 0-day global period. No preoperative or postoperative services are bundled into the payment. Each cast application encounter is billed on its own. Follow-up visits after the cast is applied are separately billable under evaluation and management (E&M) codes.

The bundling question that decides most claims is fracture care on the same day. Per CMS Article A52767, cast application is generally included in the global package of definitive fracture care codes. For the distal radius, those are 25600 to 25605. Billing 29075 separately on that date without modifier support triggers an automatic edit and denial.

• 29075 separately billable: When a different provider applies the cast, or when it replaces a cast applied at another facility
• 29075 bundled (do not bill separately): When applied as part of definitive fracture management by the same provider on the same date
• Modifier 58 required: When the cast application falls in the global period of a prior surgery and is a planned staged service

Billing CPT 29075 with cast removal code 29700

When a cast is removed and reapplied in the same encounter, both codes can be billed together. 29075 covers the new cast and 29700 covers the removal. Modifier 76 on CPT 29075 tells the payer this is a repeat procedure by the same provider, though some payers ask for modifier 51 instead.

Documentation for a cast change must state the reason for removal and replacement. It also needs the clinical indication for the new cast, plus the type and material used.

Short arm cast documentation requirements

Thorough documentation is the primary defense against claim denial and post-payment audit for CPT Code 29075. Each element below must appear in the clinical note before billing.

• Clinical indication: The diagnosis driving the need for immobilization, supported by physical exam findings and/or imaging results
• Cast type and material: Specify whether fiberglass or plaster; note any special padding or waterproofing applied
• Anatomical extent: State that the cast runs from the elbow to the base of the fingers, rather than a long arm or wrist-only cast
• Provider performing the procedure: Identify whether the cast was applied by the attending physician, resident, or trained technician under supervision
• Patient education: Document that cast care instructions were provided, including signs of neurovascular compromise requiring immediate return
• Supervising physician attestation: Required when the cast is applied by a non-physician provider; the supervising physician must co-sign the note per payer guidelines

Billing guidelines and common denial triggers

Most CPT 29075 denials trace back to five predictable mistakes. Addressing them in the billing workflow, rather than after the denial arrives, saves the most staff time. Billing teams can also check which denial codes for billers land most often on musculoskeletal claims, then work down that list.

• Upcoding to long arm cast codes: Billing 29065 when the cast terminates below the elbow is a compliance risk. Document the exact proximal boundary of the cast.
• Missing LT/RT modifiers: Most commercial payers and Medicare require laterality modifiers on all extremity codes. Omitting them results in automatic rejection on first-pass edits.
• Bundling error with fracture care: Billing 29075 separately after same-day fracture care, with no modifier justification, triggers a National Correct Coding Initiative (NCCI) denial.
• Insufficient medical necessity documentation: Applying a cast for a condition better treated by splinting, without documenting clinical rationale, risks retrospective denial after payer review. Cite imaging findings and functional status in the note.
• Incorrect encounter type for ICD-10 seventh character: Using initial encounter codes (“A”) on follow-up visits results in claim flags. Match the seventh character to the patient’s care phase.

Practices that validate every required field before transmission submit a clean claim far more often. Those checks catch these five errors before the payer ever sees them.

Related upper extremity cast and strapping codes

Choosing the right code from this family means matching the anatomical extent and the procedure type precisely. Billing 29075 when the scenario calls for a neighboring code affects payment and compliance alike. The chart below maps each code to the point where the cast or splint stops.

How Pabau keeps cast application claims clean

Coders look CPT Code 29075 up in a reference tool, then retype the code, the modifier, and the ICD-10 pairing into the billing system. Each handoff is a chance to drop a laterality modifier or pair the cast with the wrong diagnosis.

Practice management software like Pabau removes those handoffs. When 29075 is selected at the point of care, the modifier prompts surface with it. The diagnosis from the clinical note carries straight into the claim.

Our claims software for practices then validates the claim against NCCI edits, so bundling conflicts appear before transmission rather than on a remittance.

Pabau’s billing module also connects to Claim.MD, so electronic remittance advice posts against open claims automatically. Cast application payments reconcile without manual entry, which cuts the hours a billing team spends on rework each month.

Send cast application claims out right first time

Pabau prompts for the modifier and the ICD-10 pairing when CPT 29075 is selected, so billing staff catch errors before submission.

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Conclusion

Two decisions carry most of the money on a 29075 claim. The first is where the cast stops, which separates 29075 from 29065 and 29085. The second is who performed the fracture care, which decides whether the cast is billable at all.

Both are documentation decisions, made minutes before anyone opens the billing system. A practice that records the proximal boundary and the treating provider in the note rarely has to argue either point with a payer months later.

Book a demo to see how Pabau prompts for those details while the cast is still being applied.

Continue your research

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