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    v1.0.31
    OpenPayerBilling CodesRemoval or Repair of Casts and StrappingCPT cpt-29730-cast-windowing-wound-inspection
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    CPT 29730: Cast Window for Wound Inspection

    Medicare pays $69 and commercial payers pay $145 on average nationally for this procedure.

    CPT code 29730 describes removal of a small section of a cast (a cast window) to inspect an underlying wound or check for skin breakdown; this is a cast window procedure typically performed as a minor surgical/orthopaedic service in an outpatient clinic or emergency department to assess wound status and skin integrity beneath immobilization.

    For related coverage guidance, see recent payer policy updates: Medical Necessity Guidelines Non-Emergency Transportation, Non-Emergent Transportation Medical Policy, Non-Emergency Facility to Facility Transfers.

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    National Reimbursement Benchmarks

    Commercial averages sit well above Medicare for CPT 29730: Blue Cross Blue Shield and BUCA both post mean commercial levels substantially higher than Medicare’s mean of $69.1, with BUCA’s mean at $145.5 and Blue Cross Blue Shield’s mean at $197.3, highlighting a sizable commercial/Medicare gap across national benchmarks. Cigna, Aetna, and UnitedHealth Group have intermediate mean rates ($92.1, $39.8, and $97.5 respectively), which cluster around or above Medicare depending on payer.

    Dispersion measured by the interquartile range (P75–P25) is widest for Blue Cross Blue Shield at $82.6 and for UnitedHealth Group at $59.8, indicating larger variability in allowed amounts; BUCA’s IQR is $68.7, also relatively wide. The tightest distributions appear with Aetna (IQR $40.0) and Cigna (IQR $55.0). Medicare’s IQR is narrow at $7, reflecting relatively consistent local fee schedules across the 47 localities.

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    National Payer Mean Reimbursement Rates

    State Reimbursement Rates

    State: Alaska1 / 51

    Rate by payer

    Clinical & Coding Specifications

    Clinical Context

    A middle-aged patient presents to an orthopaedic clinic three weeks after a closed distal radius and ulna fracture treated with a cast. The patient reports new focal pain and a malodorous spot under the cast. The treating orthopaedic surgeon documents concern for skin breakdown and possible wound contamination. The clinical workflow includes rooming the patient, reviewing the initial injury and imaging, consenting for limited cast windowing, and preparing sterile instruments. The provider removes a small section of the cast at the affected site (CPT 29730) to inspect the underlying skin, evaluate for pressure ulceration or wound drainage, obtain wound photographs, and determine need for wound care, cast modification, or immediate further intervention. After inspection, the provider either applies a protective dressing and repairs the cast or replaces the cast entirely. Documentation includes the indication for limited cast removal, findings under the cast, any wound care performed, time spent, and the anatomical side using LT or RT modifiers as appropriate.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    29720Removal or repair of casts and strapping (other code in same category)

    Related Modifiers

    6 rows

    ModifierDescriptionWhen to Use
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    25CPT modifier 25 indicates that on the same day as another procedure or service, the same physician or other qualified health care professional provided a significant, separately identifiable…- When to apply: Use modifier 25 only on an E/M code to indicate the same provider delivered a significant, separately identifiable E/M service on the same day as another procedure or service — i.e.,…
    73Modifier 73 indicates a facility-level outpatient hospital or ASC procedure that was discontinued after the patient was prepared and taken to the procedure/operating room but before any anesthesia…- When to use: Apply CPT modifier 73 on the FACILITY (outpatient hospital or ASC) claim when the patient has been fully prepared and physically taken into the procedure/operating room but the…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207X00000X
    207XX0004X
    207XX0801X
    207R00000X
    246QM0706X
    364SL0600X
    261QR0405X
    103GC0700X

    Related Payer Policy Updates

    Specialty: Emergency & Medical Transportation1 / 3

    10 rows

    PolicyPayerEffective Date
    Medical Necessity Guidelines Non-Emergency TransportationMass General Brigham Health Plan2026-11-01
    Non-Emergent Transportation Medical PolicyHealth-New-England2026-11-01
    Non-Emergency Facility to Facility Transfershap_caresource_mi_coordinated_health2026-11-01
    Ambulance and Medical Transport Services (Ground, Air and Water) Corporate Medical Policybcbsvermont2026-10-01
    Emergency Air/Water Ambulance Services Medical GuidelineWPS Health Insurance2026-10-01
    Non-Emergent Ambulance ServicesConnectiCare2026-09-11
    Fixed Wing Air Ambulance TransportCigna2026-08-15
    Air AmbulanceAmbetter Georgia2026-08-01
    Ambulance Services (for New Mexico Only)UnitedHealthcare2026-08-01
    Ambulance Services (for Tennessee Only)UnitedHealthcare2026-08-01

    Related Codes

    CPT-29700-CAST-REMOVAL-OR-MODIFICATION-BODY-FOOT-HAND

    CPT 29700: Removal or Modification of Cast (Body, Foot, or Hand)

    CPT-29705-FULL-ARM-OR-LEG-CAST-REMOVAL-MODIFICATION

    CPT 29705: Removal or Modification of Full Arm or Leg Cast

    CPT-29710-SPICA-MINERVA-RISSER-CAST-REMOVAL-MODIFICATION

    CPT 29710: Spica/Minerva/Risser Cast Removal or Modification

    CPT-29720-SPICA-BODY-JACKET-CAST-REPAIR

    CPT 29720: Repair of Spica/Body/Jacket Cast

    CPT-29740-CAST-WEDGING-LONG-BONE-FRACTURE-REALIGNMENT

    CPT 29740: Cast Wedging for Long Bone Fracture

    CPT-29750-CLUBFOOT-CAST-WEDGE-REPOSITIONING

    CPT 29750: Cast Wedging to Reposition Foot for Clubfoot

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

    Alternative code used when full cast removal or larger repair is performed instead of a limited cast window
    29740Removal or repair of casts and strapping (wedging realignment)Used when cast modification includes wedging or realignment of the fracture in addition to inspection