Radiation Oncology Billing Services Across Treatment Planning, IMRT, SRS, SBRT, and Brachytherapy
Radiation oncology billing is structured around a fundamental rule that most billing companies misapply: planning codes are billed once per course, delivery codes are billed per session, and weekly management is billed per 5 fractions. IMRT billing services require per-session delivery tracking across courses that span weeks. Stereotactic radiosurgery billing requires equipment-specific code selection. Brachytherapy billing services require channel count verification on every HDR fraction. MBC radiation oncology billing services apply every billing event correctly, every course, every patient.
Performance data from MBC-managed radiation oncology programs nationwide
Radiation Oncology Billing Losses Most Programs Never Fully Quantify
Radiation oncology billing losses come from two directions. On one side, missed delivery sessions generate revenue that was delivered but never billed. On the other side, planning codes billed more than once per course and IGRT billed on sessions without documentation create compliance exposure. Both patterns can exist simultaneously in the same program, generating revenue loss and audit risk at the same time.
Current Regulatory Updates Affecting Radiation Oncology Billing
Three Policy Changes Directly Impacting Radiation Oncology Billing Services Revenue
Radiation Oncology Alternative Payment Model and Episode-Based Payment Considerations
CMS has pursued a Radiation Oncology Alternative Payment Model that would bundle radiation oncology billing payments by cancer type into a single episode-based payment covering planning, delivery, and management. While full mandatory implementation has been repeatedly delayed, voluntary participation continues and the bundled payment framework affects how individual fee-for-service claims interact with episode reconciliation. Radiation oncology programs must understand both the current fee-for-service billing requirements and the trajectory of episode-based payment to maintain accurate financial projections across IMRT, SRS, and brachytherapy service lines.
Commercial Payer Prior Authorization Expansion for IMRT, SRS, and Brachytherapy
Commercial payers and Medicare Advantage plans have significantly expanded prior authorization requirements for IMRT billing services, stereotactic radiosurgery billing, and brachytherapy billing services. Authorization criteria now commonly specify the cancer type, stage, treatment site, planned fractionation schedule, and required documentation of why the advanced modality is medically necessary over conventional external beam radiation. Radiation oncology programs without systematic pre-treatment authorization workflows for each modality face claims denials on completed treatment courses after the full course has already been delivered.
CY2026 Radiation Oncology RVU Adjustments Across Planning, Delivery, and Management Codes
CMS finalized RVU adjustments for radiation oncology billing codes in the CY2026 Physician Fee Schedule. Planning codes (77261-77263, 77301, 77435), delivery codes (77385-77386, 77371-77373), and weekly management (77427) were affected. For high-volume radiation oncology programs treating hundreds of patients simultaneously across multiple modalities, per-code reimbursement adjustments compound into significant annual revenue shifts. Programs that have not reconciled fee schedules against CY2026 rates are collecting at incorrect levels across their entire treatment volume.
Radiation Oncology-Specific Billing Challenges
Why Generic Billing Companies Cannot Manage Radiation Oncology Revenue at Session-Level Precision
Radiation oncology billing errors are structural. The same session tracking failure that misses one fraction on one patient misses every fraction on every patient simultaneously across the entire census of active treatment courses.
Delivery Session Gaps Where Treated Fractions Are Not Matched to Submitted Claims
Radiation therapy delivery sessions must be billed individually, one claim per fraction delivered. When the billing workflow does not reconcile the number of fractions delivered against submitted claims for each active treatment course, sessions are permanently lost. For a program treating 60 patients simultaneously on a 28-fraction IMRT course, a 5% session billing gap represents approximately 84 unbilled fractions per course. Each missed IMRT delivery session loses the full allowed amount for that fraction, revenue that was physically delivered to the patient but never captured in the billing system.
Planning Codes Billed More Than Once Per Treatment Course
Treatment planning codes (77261-77263, 77301, 77435) are billed once per course of treatment, not once per fraction or once per week. When billing workflows trigger planning code billing at the start of each billing cycle rather than at the start of each treatment course, the same planning code is billed multiple times for the same course. CMS and commercial payers deny duplicate planning code submissions and generate recoupment requests on previously paid duplicate claims. Planning code compliance is the second most common radiation oncology billing audit trigger.
IGRT Billed Without Supporting Documentation in the Treatment Record
Image-guided radiation therapy (77387) is separately billable when image guidance is used to position the patient for treatment and is documented in the treatment record. When 77387 is billed on sessions where image guidance was not used or where the treatment record does not document the imaging performed, the claims represent unsupported billing. At 28% IGRT documentation gap rate, programs that bill 77387 on every session without verifying documentation are generating systematic compliance exposure on a high-frequency billing code that is specifically reviewed in radiation oncology audits.
IMRT vs. Conventional Delivery Code Mismatches
IMRT delivery codes (77385-77386) are only appropriate for sessions where IMRT was actually delivered. When a patient's treatment plan transitions from IMRT to conventional EBRT for any portion of the course, the delivery code must change to reflect the modality used in that specific session. Billing IMRT delivery codes on sessions where conventional treatment was delivered is systematic overcoding that generates both payer recoupment and compliance exposure across every affected session in the course.
Weekly Treatment Management Billed by Calendar Week Instead of Per 5 Fractions
Weekly treatment management (77427) is billed after each group of 5 fractions delivered, not once per calendar week. When billing teams apply 77427 weekly based on the calendar regardless of the number of fractions delivered that week, they generate overpayment claims during weeks with fewer than 5 fractions and miss management billing in weeks with more than 5 fractions. 77427 compliance requires counting actual delivered fractions per patient, not applying a weekly calendar billing trigger.
Brachytherapy Channel Count Errors Between 77770, 77771, and 77772
HDR brachytherapy billing services require the correct code based on the number of channels used: 77770 for a single channel, 77771 for 2-12 channels, and 77772 for more than 12 channels. Channel count must be verified from the treatment record for each fraction billed. When billing teams apply the same brachytherapy code to every fraction without verifying per-fraction channel count, they either systematically undercode or overcode every HDR fraction. For a high-volume gynecologic HDR program billing hundreds of fractions monthly, systematic channel count errors represent both revenue loss and compliance exposure at scale.
Enterprise Radiation Oncology RCM
Radiation Oncology Billing Services Engineered for Session-Level Accuracy Across Every Treatment Course
Radiation oncology billing is not a claim submission problem. It is a treatment record reconciliation problem that requires matching every delivered fraction to a submitted claim before the billing cycle closes each day. Learn more about our revenue cycle management services.
Daily Delivery Session Reconciliation Against Treatment Records
Fractions delivered each day reconciled against submitted claims before the billing cycle closes. Every active treatment course tracked from first fraction through final fraction. Session count per course verified against the planned fractionation schedule. No fraction delivered goes unbilled because the billing workflow did not capture the treatment session. Delivery session capture rate reported per course and per modality weekly.
Treatment Planning Code Per-Course Compliance
Planning codes (77261-77263, 77301, 77435) billed once per course with course identity tracked per patient. Planning code submissions verified against course records to prevent duplicate planning billing. IMRT planning (77301) and MLC device (77338) billed once per IMRT course, not per fraction. SBRT planning (77435) billed once per SBRT course. No planning code submitted more than once for any single treatment course.
IGRT Documentation Verification Before 77387 Billing
Treatment record reviewed for image guidance documentation before 77387 is included on any delivery session claim. 77387 billed only when the treatment record confirms image guidance was performed and the imaging type is documented. IGRT billing compliance monitored per session to eliminate unsupported 77387 submissions across the program census. IGRT capture rate reported against the treatment records to identify sessions where IGRT was performed but not billed.
IMRT Billing Services with Modality-Matched Delivery Codes
Delivery code selection verified against the treatment modality used in each session. IMRT delivery codes (77385-77386) applied only on sessions where IMRT was delivered and documented. Conventional EBRT codes applied on sessions where conventional treatment was used. Modality transitions within a course tracked and applied on the correct session date. Simple versus complex IMRT delivery code selection (77385 vs. 77386) verified from the treatment planning record.
Weekly Treatment Management Billing Per 5 Delivered Fractions
77427 triggered after each group of 5 fractions delivered, not by calendar week. Fraction count tracked per patient from first treatment day. 77427 billed when the cumulative fraction count reaches a new multiple of 5. Final fractions at course end billed under 77431 for 1-4 remaining fractions. No weekly management claim billed based on calendar date without confirming the delivered fraction count threshold has been reached.
Brachytherapy Billing Services with Per-Fraction Channel Verification
HDR brachytherapy code selection (77770, 77771, 77772) verified against the documented channel count in the treatment record for each fraction billed. Single-channel 77770 applied only when one channel is documented. Multi-channel 77771 applied for 2-12 channels. 77772 applied for greater than 12 channels. Channel count verified per fraction, not assumed to be constant across the HDR course. Surface brachytherapy billing (77767, 77768) and LDR seed implant billing tracked under separate protocols.
Radiation Oncology Billing Code Reference
Mastering Every CPT Code for Radiation Oncology Billing Services
Radiation oncology CPT codes span treatment planning, IMRT delivery, SRS and SBRT, brachytherapy, IGRT, and weekly management. Our specialists apply every code correctly at the correct billing frequency across every course.
Treatment Planning and Simulation: Planning (77261-77263), IMRT Planning (77301), Simulation (77280-77295)
| CPT Code | Description | Radiation Oncology Billing Note |
|---|---|---|
| 77261 / 77262 / 77263 | Radiation Treatment Planning: Simple (77261), Intermediate (77262), Complex (77263) | Bill once per treatment course. Complexity based on number of treatment volumes and technique. Do not rebill at the start of a new billing period if the treatment course is ongoing. Duplicate planning codes are the most audited billing pattern in radiation oncology. |
| 77301 | IMRT Planning: Intensity Modulated Radiation Therapy Treatment Plan | Bill once per IMRT course in addition to 77263. Bill 77338 (MLC device) once per IMRT course separately. Do not bill 77301 on the same course as 77295 (3D conformal planning); IMRT planning replaces 3D planning billing when IMRT is the treatment modality. |
| 77280-77295 | Simulation: Simple (77280), Intermediate (77285), Complex (77290), 3D Conformal (77295) | Bill once per course per simulation type. 77295 for 3D conformal simulation when IMRT is not used. Document simulation complexity and number of treatment fields. Do not bill simulation again if the patient is re-simulated for the same course without a new planning indication. |
IMRT Billing Services: Delivery Simple (77385), Complex (77386), IGRT (77387), Weekly Management (77427)
| CPT Code | Description | Radiation Oncology Billing Note |
|---|---|---|
| 77385 / 77386 | IMRT Delivery: Simple (77385) and Complex (77386) Per Treatment Session | Bill per fraction delivered. 77386 for complex IMRT with multiple prescription dose levels, complex motion management, or other complexity factors documented in the treatment plan. Reconcile session count against the treatment record at the end of each week. Every missed session is permanent revenue loss. |
| 77387 | Image-Guided Radiation Therapy (IGRT): Guidance for Localization Per Treatment Session | Bill only when image guidance is documented in the treatment record for that session. Document the imaging modality used (kV, CBCT, fluoroscopy, etc.). Do not bill 77387 on sessions where imaging was not performed or not documented. IGRT billing on every session without documentation verification generates compliance exposure. |
| 77427 | Weekly Radiation Treatment Management: Per 5 Fractions Delivered (Not Per Calendar Week) | Bill after each group of 5 delivered fractions, not by calendar date. Count actual fractions delivered per patient. For courses ending with fewer than 5 remaining fractions, bill 77431 for 1-4 final fractions. Document the on-treatment visit and toxicity assessment supporting weekly management billing. |
Stereotactic Radiosurgery Billing (77371-77372) and SBRT Billing (77373, 77435)
| CPT Code | Description | Radiation Oncology Billing Note |
|---|---|---|
| 77371 / 77372 | SRS: Multisource Cobalt-60 System (77371) and Linear Accelerator (77372) Per Session | Select based on the equipment used. 77371 for Gamma Knife and other multisource cobalt-60 systems. 77372 for linac-based SRS. Bill per session. Prior authorization required by most commercial payers; obtain before treatment. Bill 77387 (IGRT) separately when image guidance is used and documented. |
| 77373 | SBRT Delivery Per Session: Extracranial Stereotactic Body Radiation Therapy | Use for extracranial SBRT (lung, spine, liver, etc.). Bill per fraction; SBRT courses typically 3-5 fractions. Bill 77435 for SBRT planning once per course. Do not use 77373 for intracranial stereotactic treatments; those use 77371 or 77372. |
| 77435 | SBRT Planning: Stereotactic Body Radiation Therapy Treatment Plan | Bill once per SBRT course. Replaces standard planning codes when SBRT is the treatment modality. Bill in addition to 77435 on the same course only when the treatment plan requires distinct additional planning documentation. |
Brachytherapy Billing Services: HDR Remote Afterloading (77770-77772), Surface Brachytherapy (77767-77768), Prostate Seed (55875)
| CPT Code | Description | Radiation Oncology Billing Note |
|---|---|---|
| 77770 / 77771 / 77772 | HDR Remote Afterloading Brachytherapy: Single Channel (77770), 2-12 Channels (77771), More Than 12 (77772) | Select based on the number of channels documented in the treatment record for each fraction. Verify channel count per fraction; do not assume it is constant across the course. Bill per HDR fraction delivered. Application procedure codes billed separately for catheter or applicator placement when performed as a distinct service. |
| 77767 / 77768 | Surface Brachytherapy: HDR Non-Prescribed Surface (77767) and HDR Prescribed Surface Application (77768) | 77767 for non-prescribed surface HDR (skin lesions, superficial targets). 77768 for prescribed surface HDR. Bill per fraction. Document the application site, source dwell positions, and prescribed dose for each fraction to support code selection. |
| 55875 | Prostate LDR Seed Implant: Transperineal Placement of Radioactive Seeds | Bill 55875 for the implant procedure plus separate codes for the seeds by type and quantity. Real-time dosimetry (76950) separately billable when performed. Prior authorization required. Bill the radiation oncology professional component separately from the urologist's surgical component when shared care applies. |
Radiation Oncology Revenue Architecture
Three Revenue Streams Every Radiation Oncology Billing Service Must Manage
Radiation oncology billing revenue is structured across three billing frequencies that must be managed simultaneously and independently for every patient in active treatment.
Per-Course Revenue: Treatment Planning and Simulation Billing
Treatment planning and simulation codes generate one-time revenue events at the start of each treatment course. Planning code accuracy, modality-appropriate code selection (77263 vs. 77301 vs. 77435), simulation complexity coding, and MLC device billing for IMRT courses each determine whether the per-course revenue component is correctly captured. Duplicate planning billing generates both overpayments and audit exposure. Undercoded planning complexity (77261 billed for a case that qualifies for 77263) loses the incremental value on every course where complexity was not assessed.
Per-Session Revenue: Delivery, IGRT, and Stereotactic Treatment Billing
Per-session revenue is the highest-volume billing stream in radiation oncology and the most consistently under-captured. IMRT billing services, SRS billing, SBRT billing, and IGRT (77387) each generate a separate billing event for every fraction delivered. For a program treating 60 active IMRT courses simultaneously, the per-session billing stream generates 60 claims per treatment day. A 95% capture rate on 28-fraction courses loses 3 sessions per course, representing permanent revenue loss across every patient treated. Session-level reconciliation is the most operationally critical billing task in radiation oncology.
Per-5-Fraction Revenue: Weekly Management and Brachytherapy Fraction Billing
Weekly treatment management (77427) and brachytherapy fraction billing (77770-77772) generate recurring revenue events that require per-patient fraction count tracking rather than calendar-based billing. 77427 billed by calendar week rather than per 5 fractions generates both overpayments during short treatment weeks and missed billing during long weeks. Brachytherapy billing services require per-fraction channel count verification on every HDR claim. Both revenue streams require patient-level tracking workflows that no calendar-based billing system can manage correctly.
Why Choose MBC for Radiation Oncology Billing Services
When You Outsource Radiation Oncology Billing, You Need Treatment Record Specialists, Not Generalists
Every radiation oncology program that chooses to outsource radiation oncology billing services to MBC gets a team built exclusively for session-level delivery tracking, planning code compliance, and modality-specific billing accuracy.
Dedicated Radiation Oncology Billing Specialists
Your program is managed by coders and billers who work exclusively with radiation oncology billing services. Daily delivery session reconciliation, planning code per-course compliance, IMRT billing services session tracking, stereotactic radiosurgery billing code selection, brachytherapy billing services channel verification, IGRT documentation compliance, and weekly management fraction counting applied to every course, every patient, every payer.
Radiation Oncology Revenue Dashboards
Real-time visibility into delivery session capture rate per modality, planning code compliance by course, IGRT documentation accuracy, weekly management fraction count status per patient, brachytherapy channel count accuracy, prior authorization status per treatment course, and denial rate by code category. Your administrator sees session-level billing gaps before they become end-of-course revenue shortfalls.
RCM Principal with Radiation Oncology Billing Expertise
Your first engagement is with a senior RCM Principal who understands IMRT billing services planning and delivery code mechanics, SRS and SBRT billing code distinctions, HDR brachytherapy billing services channel count requirements, IGRT documentation compliance, and weekly management per-5-fraction billing rules. Not someone applying standard E/M billing logic to radiation therapy.
HIPAA-Compliant Treatment Record and Oncology System Integration
Secure integration with your radiation oncology information system (ARIA, Mosaiq, or equivalent) and treatment record documentation. Fraction counts reconciled from the treatment management system daily. Planning documents matched to course records before planning code submission. IGRT documentation verified from the treatment record before 77387 billing. Every billing event triggered by treatment record data, not by calendar or manual entry.
Radiation Oncology Compliance Monitoring and Audit Protection
Planning code duplicate submission monitoring, IGRT documentation compliance audits, IMRT vs. conventional modality code accuracy reviews, weekly management fraction count accuracy, and brachytherapy channel count compliance monitoring. Audit readiness maintained as a standard operational state. Every radiation oncology billing submission reviewed against the treatment record before it reaches the payer.
Quarterly Radiation Oncology Revenue Integrity Reviews
Strategic reviews covering delivery session capture rates by modality, planning code compliance rates, IGRT billing accuracy, weekly management fraction count accuracy, brachytherapy billing completeness, prior authorization denial trends, and payer contract performance. Specific action plans your administrator can implement to improve radiation oncology billing revenue across every treatment modality.
Outsource Radiation Oncology Billing to MBC
Ready to See What Your Radiation Oncology Billing Services Team Is Actually Leaving Behind?
Schedule a 15-minute briefing with one of our Radiation Oncology RCM Principals. No sales pitch. We will review your delivery session capture rate by modality, planning code compliance, IGRT documentation accuracy, and brachytherapy billing services channel count accuracy, and give your administrator a realistic annual recovery projection specific to your treatment volume and payer mix. Explore our full medical billing services for radiation oncology programs.