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    OpenPayerBilling CodesCT Breast (with/without Contrast)CPT cpt-0637t-ct-bilateral-breast-with-contrast
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    CPT 0637T: CT Bilateral Breasts with Contrast

    CPT code 0637T describes a computed tomography (CT) examination of both breasts performed with intravenous contrast, intended for cross-sectional diagnostic breast imaging and may include 3D rendering; this service is an advanced diagnostic imaging procedure typically performed in an outpatient radiology department, hospital radiology suite, or dedicated breast imaging center and is billed as a contrast-enhanced bilateral breast CT study.

    For related coverage guidance, see recent payer policy updates: Corneal Remodeling for Refractive Errors and Corneal Grafting and Transplantation, Glaucoma Agents iDose TR (travoprost intracameral implant), Topical Treatments for Dry Eye Disease.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a 52-year-old woman with a new palpable breast mass and inconclusive mammography and ultrasound findings. The ordering breast surgeon requests a contrast-enhanced computed tomography (CT) bilateral breast study to further evaluate extent of disease and to assess for multifocal or multicentric lesions prior to surgical planning. The patient arrives at an outpatient radiology center or hospital outpatient imaging department. After informed consent and screening for intravenous contrast allergy and renal function, an IV catheter is placed. The CT technologist positions the patient prone or supine per facility protocol and performs a bilateral breast CT with iodinated intravenous contrast, acquiring multiplanar images; optional 3D rendering may be performed as part of the exam. The radiologist reviews axial, coronal, and sagittal reformats, documents lesion size, location (clock-face and depth), enhancement characteristics, and relationship to chest wall and skin. A diagnostic report is issued to the ordering provider with recommendations for biopsy, additional imaging (MRI, targeted ultrasound), or surgical consultation as appropriate. The typical site of service is an outpatient imaging center or hospital outpatient radiology department. The service type is diagnostic radiology — contrast-enhanced CT of both breasts (diagnostic imaging with IV contrast).

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77063Screening digital breast tomosynthesis, bilateral; performed as an adjunct to screening mammographyMay be performed as initial screening prior to diagnostic CT in the breast imaging workup.
    76085Computer-aided detection (CAD) for interpretation of breast imagingMay be used adjunctively for lesion detection on breast CT reconstructions.
    77046Magnetic resonance imaging, breast, unilateral or bilateral, with contrast material(s)Alternative cross-sectional contrast study used when additional soft-tissue characterization is needed after CT.
    19083Image-guided needle biopsy, breast, percutaneous, with placement of localization device when performed (first lesion)Performed after CT demonstrates a target lesion for biopsy and when CT or other imaging guides the procedure.
    77012CT guidance for needle placement (guidance for biopsy)Used when CT guidance is required for percutaneous breast biopsy following CT findings.

    Related Modifiers

    8 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…
    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…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    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…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207K00000X
    207WX0009X
    207WX0200X
    207UN0902X
    174M00000X
    367H00000X
    2278S1500X
    246QL0900X

    Related Payer Policy Updates

    Specialty: Ophthalmology/Optometry1 / 3

    10 rows

    PolicyPayerEffective Date
    Corneal Remodeling for Refractive Errors and Corneal Grafting and TransplantationHealth-New-England2027-02-01
    Glaucoma Agents iDose TR (travoprost intracameral implant)Mass General Brigham Health Plan2027-01-04
    Topical Treatments for Dry Eye Diseaseblue cross blue shield - louisiana2027-01-01
    Corneal Collagen Cross-LinkingMass General Brigham Health Plan2026-11-01
    VizzCigna2026-11-01
    Intraocular Lens ImplantCigna2026-11-01
    Travoprost Intracameral ImplantBluecross Idaho2026-11-01
    Ophthalmology - Pilocarpine 1.25%Cigna2026-10-15
    Intravitreal and PunctumBlue Cross Blue Shield - Rhode Island2026-10-01
    Cataract Removal Surgery for AdultsAnthem2026-10-01

    Related Codes

    CPT-0633T-CT-SINGLE-BREAST-NONCONTRAST

    CPT 0633T: CT Single Breast Without Contrast

    CPT-0634T-CT-BREAST-WITH-CONTRAST-SINGLE-BREAST

    CPT 0634T: CT Exam of Single Breast with Contrast

    CPT-0635T-BREAST-CT-WITH-AND-WITHOUT-CONTRAST

    CPT 0635T: CT of Single Breast Without and With Contrast

    CPT-0636T-CT-BREAST-BILATERAL-NO-CONTRAST

    CPT 0636T: CT of Both Breasts Without Contrast

    CPT-0638T-BILATERAL-BREAST-CT-WITH-AND-WITHOUT-CONTRAST

    CPT 0638T: CT Bilateral Breasts Without and With Contrast

    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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