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    v1.0.30
    OpenPayerBilling CodesCT Breast (with/without Contrast)CPT cpt-0633t-ct-single-breast-noncontrast
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    CPT 0633T: CT Single Breast Without Contrast

    CPT code 0633T describes a computed tomography (CT) examination of a single breast performed without intravenous contrast; the service is an imaging study (diagnostic CT of the breast) typically provided in an outpatient radiology or imaging center and may include, but does not require, 3D rendering of the acquisition.

    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 52-year-old woman with a unilateral palpable breast mass and a prior equivocal mammogram is referred for diagnostic breast CT without intravenous contrast to better define lesion morphology. The patient arrives at an outpatient radiology suite; technologists review history and confirm absence of pregnancy. The patient is positioned supine or prone per facility protocol with the single breast to be imaged centered in the CT field. A low-dose, non-contrast CT acquisition of the targeted single breast is performed, with optional 3D rendering for surgical planning or correlation with prior breast imaging. The interpreting radiologist reviews axial and reconstructed images, documents lesion size, density, calcifications, and relationship to surrounding structures, and issues a diagnostic report to the referring breast surgeon or breast clinic. Images and report are delivered to the electronic medical record and image archive for multidisciplinary review and treatment planning.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77063Screening digital breast tomosynthesis, bilateralOften used prior to targeted breast CT; tomosynthesis is an alternate advanced breast imaging modality
    77067Diagnostic mammography, including CAD when performed; bilateralCommon initial diagnostic test in the imaging pathway before targeted CT
    88305Surgical pathology, gross and microscopic examinationPerformed if CT-guided biopsy or surgical excision follows imaging
    19083Biopsy, breast, with placement of marker when performed, percutaneousPerformed after imaging identifies a target lesion for tissue diagnosis
    76942Ultrasonic guidance for needle placementMay be used alongside CT for biopsy or localization procedures

    Related Modifiers

    7 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…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    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…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RH0000X
    207V00000X
    261QM0801X
    246Q00000X
    2085R0204X
    227900000X
    3336S0011X
    364S00000X

    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-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-0637T-CT-BILATERAL-BREAST-WITH-CONTRAST

    CPT 0637T: CT Bilateral Breasts with 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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