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    v1.0.30
    OpenPayerBilling CodesBreast, MammographyCPT cpt-77066-diagnostic-bilateral-mammography-with-cad
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    CPT 77066: Diagnostic Digital Breast Tomosynthesis for Suspected Cancer

    Medicare pays $109 on average nationally for this procedure.

    CPT code 77066 describes diagnostic digital breast tomosynthesis (3D mammography) of both breasts performed for a patient with a lump or suspected breast cancer, using computer-assisted conversion of signals into digital data and image analysis; service type: diagnostic breast imaging with advanced image processing, typical site of service: outpatient radiology suite or hospital imaging department.

    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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    Clinical & Coding Specifications

    Clinical Context

    A 52-year-old female presents to the breast imaging center with a palpable right breast mass noted on self-exam. The referring breast surgeon orders diagnostic mammography with computer-aided detection to evaluate the mass. The imaging appointment is scheduled at an outpatient radiology facility. On arrival, the patient registration confirms clinical history of a new lump and prior inconclusive screening mammogram. A mammography technologist obtains bilateral diagnostic craniocaudal and mediolateral oblique views, including magnification and spot-compression as indicated. The interpreting radiologist reviews the images, applies the facility’s FDA-cleared computer-aided detection/diagnostic software that converts analog/digital signals to enhance lesion conspicuity, documents findings, and issues a diagnostic mammography report. If additional tissue characterization is required, the radiologist may recommend targeted breast ultrasound or image-guided biopsy. Typical documentation includes clinical indication (palpable mass), procedure performed as bilateral diagnostic mammography with CAD, images obtained, any additional views, and the final impression with BI-RADS assessment. Typical site of service: outpatient radiology department or dedicated breast imaging center. Service type: diagnostic bilateral mammography with computer-aided detection/analysis.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77067Screening mammography, bilateral (2-view study of each breast)Performed as routine screening; may precede diagnostic 77066 when an abnormality is identified on screening.
    76641Ultrasound, breast, unilateral, real time with image documentation, including axilla when performed; completeOften performed following diagnostic mammography 77066 to further evaluate a palpable mass or mammographic finding.
    19083Biopsy, breast, with placement of localization device when performed, and imaging guidance (e.g., stereotactic), first lesionStereotactic or image-guided biopsy may follow diagnostic mammography findings requiring tissue sampling.
    77063Computer-aided detection (CAD) for screening mammography, processing only (list separately in addition to screening mammography)Related CAD services may be reported depending on payer rules; supports lesion detection in digital studies.
    76000Fluoroscopy (separate procedure), up to 1 hour physician time, including fluoroscopic guidance and fluoroscopic supervision and interpretationMay be used as part of localization or interventional procedures following diagnostic mammography 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…
    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…
    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…
    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…
    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…
    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.,…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207P00000X
    363L00000X
    207L00000X
    207V00000X
    2081P0010X
    2278H0200X
    103GC0700X
    261QX0100X

    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-77046-BREAST-MRI-NON-CONTRAST-SINGLE-BREAST-3D

    CPT 77046: Unilateral Non-Contrast Breast MRI, 3-D Imaging

    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

    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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