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    v1.0.28
    OpenPayerBilling CodesComputed Tomography AnalysisCPT cpt-0558t-biomechanical-ct-analysis
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    CPT 0558T: CT Biomechanical Analysis of Anatomic Structure

    CPT code 0558T describes a CT imaging procedure performed to analyze the biomechanical properties of the anatomic structure being imaged, focused on how body structures interact to produce movement; the service type is an advanced diagnostic CT for biomechanical assessment and the typical site of service is an outpatient imaging center or hospital radiology department.

    For related coverage guidance, see recent payer policy updates: Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA), Cardiovascular Disease Risk Assessment, Biomarkers for Myocardial Infarction and Chronic Heart Failure.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult referred by an orthopedic surgeon or physiatrist for evaluation of suspected altered biomechanical integrity of a musculoskeletal structure (for example, complex joint instability, post-traumatic deformity, or preoperative functional assessment of the spine or knee). The patient presents with progressive pain, functional limitation, or recurrent instability after prior surgery or injury. Prior plain radiographs are often obtained; when those are insufficient to characterize motion-related abnormalities, the provider orders a CT-based biomechanical analysis.

    The clinical workflow begins with referral and review of history and prior imaging. The imaging physician documents the indication, explains the specialized CT protocol to evaluate movement or load-bearing properties, and obtains informed consent. The CT acquisition uses dynamic or phased imaging parameters and patient positioning tailored to the structure (e.g., weight-bearing or flexion-extension for spine, dynamic knee imaging). Image reconstruction and post-processing quantify spatial relationships, range of motion, and load transmission; the interpreting provider generates a report describing biomechanical parameters and implications for surgical planning or conservative management. The professional component and technical component may be billed separately when appropriate; associated modifiers document atypical circumstances, reduced services, or multiple surgeons/assistants.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    72125CT lumbar spine without contrastOften performed before or as adjunct imaging to characterize bony anatomy for biomechanical analysis of the lumbar spine
    73700CT lower extremity joint, any joint; without contrastBaseline CT of knee/ankle used in conjunction with dynamic biomechanical CT protocols
    763763D rendering with interpretation and reporting of CT, MRI, ultrasound, or other tomographic modality; rendering of image dataPost-processing code commonly used for advanced 3D biomechanical reconstructions
    77046Computed tomography guidance for localization and imaging during proceduresUsed when CT-based biomechanical assessment is combined with image-guided interventions
    74176CT abdomen and pelvis, without contrast, with further quantitative or specialized analysisExample of complex CT acquisition codes that may be billed when additional specialized quantitative analysis is performed

    Related Modifiers

    6 rows

    ModifierDescriptionWhen to Use
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    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…
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207RC0000XCardiovascular Disease PhysicianAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    2086S0105XSurgery of the Hand (Surgery) PhysicianA surgeon with expertise in the investigation, preservation and restoration by medical, surgical and rehabilitative means, of all structures of the up…
    2084P0800XPsychiatry PhysicianA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
    163W00000XRegistered Nurse(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
    2080P0006XDevelopmental - Behavioral Pediatrics PhysicianA developmental-behavioral specialist is a pediatrician with special training and experience who aims to foster understanding and promotion of optimal…
    2472V0600XVeterinary TechnicianNone
    3104A0625XAssisted Living Facility (Mental Illness)A facility providing supportive services to individuals who can function independently in most areas of activity, but need special guidance, assistanc…

    Related Payer Policy Updates

    Specialty: Cardiology1 / 3

    6 rows

    PolicyPayerEffective Date
    Cardiac Computed Tomography (CCT)/Coronary Computed Tomographic Angiography (CCTA)univerahealthcare2026-10-15
    Cardiovascular Disease Risk AssessmentOscar Health2026-10-01
    Biomarkers for Myocardial Infarction and Chronic Heart FailureOscar Health2026-10-01
    Multiple Procedure Payment Reduction for Diagnostic Cardiovascular ProceduresBlue Cross Blue Shield - Maine2026-10-01
    Cardiovascular Disease Risk Assessmentblue cross blue shield - louisiana2026-09-15
    Cardiovascular Disease Risk AssessmentBlue Cross Blue Shield - New Mexico2026-09-04

    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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