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    v1.0.30
    OpenPayerBilling CodesBreast, MammographyCPT cpt-77046-breast-mri-non-contrast-single-breast-3d
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    CPT 77046: Unilateral Non-Contrast Breast MRI, 3-D Imaging

    Medicare pays $148 on average nationally for this procedure.

    CPT code 77046 describes a non-contrast, three-dimensional magnetic resonance imaging (MRI) study of a single breast, obtained by applying an external magnetic field and radiofrequency waves to generate detailed cross-sectional and volumetric images; this is an imaging service typically performed in an outpatient radiology or imaging center setting and used for diagnostic evaluation of breast tissue without use of intravenous contrast.

    For related coverage guidance, see recent payer policy updates: Abortion Services, Prolonged Services for Labor Management, Prolonged Services for Labor Management.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 52-year-old woman with a history of dense breast tissue and a recent suspicious finding on screening mammography is referred for a diagnostic breast MRI without contrast to further evaluate a focal architectural distortion in the left breast. The imaging appointment is scheduled at an outpatient radiology center. The MRI technologist confirms patient identity, screens for MRI safety (implants, pacemakers, metal, renal function not required for non-contrast study), explains the procedure, and positions the patient prone with the breast coil. The radiologist selects a non-contrast, high-resolution 3D T1-weighted and T2-weighted pulse sequence protocol to obtain a single-breast dataset, focusing on the area of concern. Images are obtained, processed into multiplanar reconstructions, and interpreted by the radiologist who documents findings, impression, and any recommendation for biopsy or contrast-enhanced study. Billing uses 77046 for the single-breast MRI without contrast; technical and professional components are split as appropriate when reporting.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77046Magnetic resonance imaging, breast, without contrast for a single breastPrimary procedure described; non-contrast 3D MRI of a single breast.
    77047Magnetic resonance imaging, breast, without contrast for bilateral breastsPerformed when both breasts require non-contrast MRI; alternative to separate 77046 reports for each side.
    77048Magnetic resonance imaging, breast, with contrast for a single breastPerformed when contrast-enhanced evaluation is required after or instead of non-contrast imaging.
    77049Magnetic resonance imaging, breast, with contrast for bilateral breastsBilateral contrast-enhanced exam when indicated.
    19083Biopsy, breast, MRI-guided, with placement of marker (per lesion)Performed when MRI identifies a lesion requiring MRI-guided tissue sampling following 77046 imaging.
    76098Computer-aided detection; other organ system (Note: historically used for mammography CAD)May be used in facilities employing CAD or advanced post-processing with breast MRI datasets.

    Related Modifiers

    10 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…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    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…
    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…
    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…
    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…
    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…
    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
    207RC0000X
    207L00000X
    163W00000X
    261QR0400X
    2084V0102X
    251C00000X
    207KI0005X
    261QA0005X

    Related Payer Policy Updates

    Specialty: Obstetrics/Gynecology1 / 3

    10 rows

    PolicyPayerEffective Date
    Abortion ServicesNew Mexico Health Care Authority2027-01-01
    Prolonged Services for Labor ManagementPremera Bluecross2027-01-01
    Prolonged Services for Labor ManagementPremera Bluecross2027-01-01
    Maternal Serum Testing for Prediction of Adverse Obstetric OutcomesPremera Bluecross2026-10-01
    Maternal Serum Testing for Prediction of Adverse Obstetric OutcomesPremera Bluecross2026-10-01
    Maternal Serum Testing for Prediction of Adverse Obstetric OutcomesBlue Cross Blue Shield - Massachusetts2026-10-01
    Cervical Cancer ScreeningOscar Health2026-10-01
    Prenatal Testing for Fetal AneuploidyOscar Health2026-10-01
    Diagnosis of VaginitisOscar Health2026-10-01
    Prenatal Screening (Nongenetic)Oscar Health2026-10-01

    Related Codes

    CPT-77047-BREAST-MRI-NON-CONTRAST-BILATERAL

    CPT 77047: Bilateral Breast MRI, Non-Contrast 3D Imaging

    CPT-77048-BREAST-MRI-SINGLE-BREAST-CONTRAST-3D

    CPT 77048: Breast MRI, Single Breast, With and Without Contrast

    CPT-77049-BREAST-MRI-WITH-AND-WITHOUT-CONTRAST-BILATERAL

    CPT 77049: Bilateral Breast MRI, 3D With and Without Contrast

    CPT-77053-DUCTOGRAM-RADIOLOGICAL-SUPERVISION-INTERPRETATION-SINGLE-DUCT

    CPT 77053: Ductogram (Galactogram), Single Duct Radiology

    CPT-77054-DUCTOGRAM-GALACTOGRAM-MULTIPLE-DUCTS-RADIOLOGICAL-INTERPRETATION

    CPT 77054: Ductogram (Galactogram), Radiologic Supervision & Interpretation

    CPT-77061-DIGITAL-TOMOSYNTHESIS-ONE-BREAST-DIAGNOSTIC

    CPT 77061: Diagnostic Digital Tomosynthesis of One Breast

    CPT-77062-DIGITAL-BREAST-TOMOSYNTHESIS-BILATERAL-DIAGNOSTIC

    CPT 77062: Digital Tomosynthesis of Bilateral Breasts for Diagnostic Evaluation

    CPT-77063-DIGITAL-BREAST-TOMOSYNTHESIS-3D-MAMMOGRAPHY

    CPT 77063: Breast Tomosynthesis (3D Mammography)

    CPT-77065-DIAGNOSTIC-BREAST-IMAGING-COMPUTER-AIDED-DETECTION

    CPT 77065: Diagnostic Mammography of One Breast with CAD

    CPT-77066-DIAGNOSTIC-BILATERAL-MAMMOGRAPHY-WITH-CAD

    CPT 77066: Diagnostic Digital Breast Tomosynthesis for Suspected Cancer

    Showing 1–10 of 11

    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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