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    v1.0.30
    OpenPayerBilling CodesClinical Brachytherapy Radiation TreatmentCPT cpt-77772-high-dose-rate-multi-channel-brachytherapy
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    CPT 77772: Interstitial or Intracavitary Brachytherapy, >12 Channels

    Medicare pays $635 on average nationally for this procedure.

    CPT code 77772 describes high-energy interstitial or intracavitary brachytherapy using more than 12 channels, where catheters are placed directly into tumor tissue or within a body cavity and the radioactive source is loaded to deliver targeted internal radiation; the service includes preloading dose calculation when performed and is typically delivered as a radiation oncology procedural service in an inpatient or outpatient radiation treatment setting.

    For related coverage guidance, see recent payer policy updates: Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disorders, Esophagogastroduodenoscopy (EGD) Coverage Policy, Radiofrequency Therapy for Fecal Incontinence.

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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old female with locally advanced cervical cancer is scheduled for interstitial and intracavitary high-dose-rate (HDR) brachytherapy using a multi-channel applicator (>12 channels) following external beam radiation therapy. The patient arrives to the outpatient radiation oncology suite, is assessed for fitness for conscious sedation or general anesthesia, and informed consent is confirmed. Under anesthesia in the procedure room or operating room, the radiation oncologist and gynecologic oncologic team place intracavitary applicators and interstitial catheters into the tumor and parametrium, then obtain CT or MRI imaging for treatment planning. Medical physicists calculate dwell times and source loading (dose calculation) and load a high-energy radioactive source into the channels; treatment is delivered via remote afterloading. Post-treatment, applicators are removed, the patient is monitored for hemostasis and immediate complications, and discharge instructions are provided. Typical sites of service include the hospital outpatient department, ambulatory surgery center, or hospital operating room depending on anesthesia and institutional practice. The service type is image-guided interstitial/intracavitary high-dose-rate brachytherapy with multi-channel (>12) applicator placement and source loading including pre-loading dose calculation when performed.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77778Remote afterloading high dose rate brachytherapy, complex, per fractionUsed to report the actual HDR afterloading treatment delivery per fraction when complex planning and multiple channels are used.
    77334Remote dosimetry calculation, brachytherapy source loading when performedReports treatment planning/dosimetry work when separate from procedural code; may be billed when detailed dosimetry is reported independently.
    57260Radiation therapy applicator placement, intrauterine, interstitial and/or vaginalRepresents surgical placement of gynecologic applicators and interstitial needles; often performed immediately prior to 77772.
    51702Injection procedure for placement of a urethral catheter, if indicatedOccasionally performed concomitantly for urinary management in pelvic brachytherapy cases.
    99070Supplies and materials (e.g., drugs, trays)Used to report non-covered supplies required during the brachytherapy procedure when not included in the primary code.

    Related Modifiers

    9 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…
    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…
    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…
    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…
    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…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and 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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    2080P0208X
    208000000X
    207L00000X
    207P00000X
    3336C0002X
    207NS0135X
    207XS0117X
    363LP2300X

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 3

    10 rows

    PolicyPayerEffective Date
    Percutaneous Electrical Nerve Field Stimulation for Functional Abdominal Pain Disordersbcbsvermont2026-12-01
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Radiofrequency Therapy for Fecal IncontinenceCigna2026-10-15
    Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD)univerahealthcare2026-10-15
    High-Resolution Anoscopy (HRA)Premera Bluecross2026-10-01
    Gastroesophageal and Gastrointestinal (GI) Services and ProceduresColorado Rocky Mountain Health Plans2026-10-01
    Serum Testing for Hepatic Fibrosis in the Evaluation and Monitoring of Chronic Liver DiseaseOscar Health2026-10-01
    Fecal Analysis in the Diagnosis of Intestinal Dysbiosis and Fecal Microbiota Transplant TestingOscar Health2026-10-01
    Pancreatic Enzyme Testing for Acute PancreatitisOscar Health2026-10-01
    Helicobacter pylori TestingOscar Health2026-10-01

    Related Codes

    CPT-77750-INTRATUMORAL-RADIOELEMENT-INFUSION-HOSPITAL-ADMISSION-FOLLOW-UP

    CPT 77750: Radioelement Instillation to Destroy Tumor Cells

    CPT-77761-INTRACAVITARY-BRACHYTHERAPY-IMPLANT

    CPT 77761: Intracavitary Brachytherapy, 1–4 Sources

    CPT-77762-BRACHYTHERAPY-INTRACAVITARY-INTERSTITIAL-IMPLANT

    CPT 77762: Intracavitary Brachytherapy with 5–10 Sources

    CPT-77763-INTRACAVITARY-BRACHYTHERAPY-MULTI-SOURCE-IMPLANTATION

    CPT 77763: Intracavitary Brachytherapy, >10 Radioactive Sources

    CPT-77767-SURFACE-BRACHYTHERAPY-SKIN-TUMOR-SMALL-LESION

    CPT 77767: High-Dose-Rate Brachytherapy for Skin Tumor ≤2.0 cm

    CPT-77768-SURFACE-BRACHYTHERAPY-SKIN-TUMOR-LARGE-OR-MULTIPLE-LESIONS

    CPT 77768: Surface Brachytherapy for Skin Tumor >2.0 cm

    CPT-77770-SINGLE-CHANNEL-BRACHYTHERAPY-CATHETER-PLACEMENT

    CPT 77770: Single-Channel Interstitial or Intracavitary Brachytherapy

    CPT-77771-BRACHYTHERAPY-INTERSTITIAL-INTRACAVITARY-MULTI-CHANNEL

    CPT 77771: Interstitial or Intracavitary Brachytherapy, 2–12 Channels

    CPT-77778-INTERSTITIAL-BRACHYTHERAPY-MORE-THAN-10-SOURCES

    CPT 77778: Interstitial Brachytherapy, >10 Radioactive Sources

    CPT-77789-LOW-DOSE-RATE-SURFACE-BRACHYTHERAPY

    CPT 77789: Low–Dose–Rate Surface Brachytherapy

    Showing 1–10 of 12

    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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