Oncology Medical Billing Services

Why Oncology Billing Stands Apart

Oncology billing carries a unique combination of complexity, financial risk, and regulatory pressure that makes it one of the most challenging areas of medical billing to manage in-house:

High-cost drugs demand exact documentation. Chemotherapy agents and biologic drugs are among the most expensive medications administered in outpatient settings. Payers require precise documentation of dosage, administration time, and drug wastage  and even minor discrepancies can trigger denials or post-payment recoupments.

Drug wastage reporting is mandatory. When a single-use vial is partially used, the wasted portion must be reported using the -JW modifier to comply with CMS rules. When no drug is wasted, the -JZ modifier is required. Failure to apply these correctly creates compliance exposure and risks audit recovery demands.

Prior authorization is required for almost everything. Most chemotherapy regimens, radiation therapy courses, PET scans, genetic testing, specialty drug infusions, and advanced immunotherapy treatments require advance authorization from payers. Managing these requests and keeping them current as treatment progresses  is an ongoing administrative challenge.

Infusion time coding is highly precise. Chemotherapy and infusion services are billed based on time thresholds and sequencing rules. Which drug is administered first, how long each infusion runs, and which services are concurrent vs. sequential all affect the correct codes. Errors in infusion coding are among the most common and most costly in oncology billing.

Payer bundling rules are specialty-specific. Oncology claims are subject to complex bundling edits from Medicare and commercial payers. Services that appear to be separate may be bundled by default, and applying the right modifiers to unbundle legitimate distinct services requires daily expertise.

ICD-10 cancer diagnoses must be precise. Payers require exact cancer staging, histology, and anatomical specificity in diagnosis coding. A vague or incomplete ICD-10 code is a leading cause of medical necessity denials in oncology.

Oncology Subspecialties and Practice Types We Support

Our oncology billing team has experience across the full spectrum of cancer care:

• Medical Oncology -chemotherapy, immunotherapy, targeted therapy, hormone therapy
• Radiation Oncology - external beam radiation, IMRT, SBRT, brachytherapy, treatment planning
• Haematology/Oncology - leukaemia, lymphoma, myeloma, bone marrow transplant programs
• Surgical Oncology - cancer resections, biopsies, mastectomy, colorectal and thoracic procedures
• Gynaecologic Oncology - ovarian, uterine, cervical cancer treatment and surgery
• Paediatric Oncology - age-specific cancer treatment billing with paediatric coding requirements
• Infusion Centres & Cancer Treatment Facilities - standalone and hospital-affiliated infusion programs
• Palliative & Supportive Care - pain management, symptom control, and end-of-life care billing

Key CPT and HCPCS Codes in Oncology Billing

Accurate code selection drives everything in oncology billing. Below are the major code categories our team manages:

Chemotherapy Administration

• 96401 – Chemotherapy administration, subcutaneous or intramuscular, non-hormonal
• 96402 – Chemotherapy administration, subcutaneous or intramuscular, hormonal
• 96409 – Chemotherapy administration, IV push, single or initial substance
• 96413 – Chemotherapy administration, infusion, up to 1 hour
• 96415 – Each additional hour of chemotherapy infusion (add-on)
• 96416 – Initiation of prolonged chemotherapy infusion (more than 8 hours)
• 96417 – Each additional sequential infusion of a different chemotherapy agent (add-on)

Hydration & Therapeutic Infusions

• 96360 – Intravenous infusion, hydration, initial 31 minutes to 1 hour
• 96361 – Each additional hour of hydration (add-on)
• 96365 – Intravenous infusion, therapeutic/prophylactic, initial up to 1 hour
• 96366 – Each additional hour (add-on)
• 96367 – Additional sequential infusion of a new substance, up to 1 hour (add-on)

Radiation Therapy

• 77300 – Basic radiation dosimetry calculation
• 77301 – Intensity modulated radiation treatment planning (IMRT)
• 77385 / 77386 – IMRT delivery, simple and complex
• 77401–77416 – Radiation treatment delivery codes by energy level
• 77427 – Radiation treatment management, 5 treatments

Surgical Oncology

• 19301 / 19302 – Partial mastectomy, with and without lymph node dissection
• 19303 – Simple mastectomy (total)
• 32663 – Thoracoscopic lobectomy (lung cancer)
• 44140 – Colectomy, partial, with anastomosis
• 58150 – Total abdominal hysterectomy with bilateral salpingo-oophorectomy

Chemotherapy Drug Codes (J-Codes)

• J9190 – Fluorouracil (5-FU)
• J9265 – Paclitaxel (Taxol)
• J9355 – Trastuzumab (Herceptin)
• J9228 – Ipilimumab (Yervoy)
• J9306 – Pembrolizumab (Keytruda)

Vascular Access

• 36561 – Insertion of tunneled centrally inserted central venous catheter (port placement)
• 36589 – Removal of tunneled central venous catheter

Key ICD-10 Codes in Oncology Billing

Every oncology claim must be supported by a precise cancer diagnosis that establishes medical necessity:

• C50.x – Malignant neoplasm of breast (requires specific quadrant and laterality)
• C18.x – Malignant neoplasm of colon (requires specific anatomical segment)
• C34.x – Malignant neoplasm of bronchus and lung
• C61 – Malignant neoplasm of prostate
• C91.x – C95.x – Leukemia (requires specific type and acute vs. chronic)
• C81.x – C86.x – Lymphoma (Hodgkin, non-Hodgkin, T-cell, B-cell)
• C90.0x – Multiple myeloma
• D46.x – Myelodysplastic syndromes
• C79.31 / C79.51 – Brain and bone metastases (secondary malignancies)
• Z51.11 – Encounter for antineoplastic chemotherapy
• Z51.12 – Encounter for antineoplastic immunotherapy
• Z51.0 – Encounter for antineoplastic radiation therapy

Pairing the correct primary cancer diagnosis with the appropriate encounter code and any secondary malignancy codes is critical for payer approval and medical necessity documentation.

Critical Modifiers in Oncology Billing

Modifiers carry enormous weight in oncology claims  correct usage prevents denials, ensures compliance, and captures the full value of services rendered:

Full Revenue Cycle Services for Oncology Practices

Insurance Verification & Benefits Confirmation We verify chemotherapy and infusion coverage, radiation therapy benefits, specialty drug authorization requirements, and patient cost-sharing obligations before treatment begins  preventing claim surprises and reducing patient billing disputes.

Prior Authorization Management We submit prior authorization requests for chemotherapy regimens, radiation courses, advanced imaging (PET/CT), genetic testing, and specialty biologic infusions. We track approval timelines, renew authorizations as treatment progresses, and manage payer communication to prevent treatment delays.

Chemotherapy & Infusion Coding We apply the correct administration codes based on infusion time, drug sequencing, and concurrent vs. sequential rules — capturing the full value of every chair hour while staying compliant with payer bundling edits.

Drug Wastage Reporting (-JW / -JZ Compliance) We ensure all single-use vial administrations are documented and coded correctly, including accurate wastage reporting with the -JW modifier and zero-wastage certification with the -JZ modifier where applicable.

Radiation Oncology Billing We manage billing for radiation treatment planning, dosimetry, simulation, and delivery applying the correct codes for IMRT, SBRT, brachytherapy, and standard external beam radiation across Medicare, Medicaid, and commercial plans.

Denial Management & Appeals Oncology claims are frequently denied for medical necessity, prior authorization issues, or bundling conflicts. We investigate every denial, correct root causes, and file detailed appeals with infusion logs, clinical notes, pathology reports, and treatment protocols to recover revenue.

Drug Cost & Reimbursement Tracking For buy-and-bill oncology practices, accurate reimbursement of chemotherapy acquisition costs is financially critical. We track drug billing against contracted rates and flag underpayments for immediate follow-up.

Payment Posting & Reconciliation We post all payments, ERA/EOB adjustments, and drug-specific reconciliations accurately  maintaining clean financial records and identifying contractual underpayments.

Accounts Receivable Recovery We pursue outstanding oncology claims aggressively, resolving payer disputes, addressing authorization lapses, and recovering aged balances that would otherwise be written off.

Telehealth Oncology Billing We manage billing for virtual follow-up visits, genetic counselling, medication management, and palliative care consultations delivered via telehealth  applying correct place-of-service codes and telehealth modifiers to maximize reimbursement.

Patient Billing & Financial Counselling Support Cancer treatment bills are often the most complex  and most emotionally sensitive  that patients ever receive. We generate clear, detailed patient statements that distinguish chemotherapy costs from physician fees, supportive care, and facility charges, and offer payment plan options to improve collections while supporting patients through a difficult time.

Oncology Billing Compliance: What We Manage

Compliance in oncology billing is non-negotiable. The combination of high-cost drugs, CMS oversight, Medicare Administrative Contractor (MAC) reviews, and commercial payer audits means that documentation gaps, coding errors, and modifier misuse can result in significant financial and legal consequences. Key compliance areas we manage include:

LCD and NCD adherence Local Coverage Determinations and National Coverage Determinations define when chemotherapy, radiation, and advanced oncology procedures are covered by Medicare. We ensure every claim aligns with applicable coverage rules before submission.

Drug wastage documentation CMS requires detailed documentation of drug lot numbers, vial sizes, dosage administered, and wastage amounts. We review infusion logs against billing to ensure full compliance.

Medical necessity justification Every chemotherapy regimen, radiation course, and diagnostic service must be tied to a documented clinical rationale. We review chart documentation to ensure it supports the services billed.

Frequency and bundling compliance Payer-specific rules govern how often certain services can be billed and which codes can be billed together. We apply these rules correctly to prevent compliance exposure.

Oncology Care Model (OCM/OCRE) reporting For practices participating in CMS value-based oncology models, we support accurate reporting of episode-based performance metrics.

Why Oncology Practices Choose MedFeeTree

• Oncology-specific expertise - We understand the clinical complexity of cancer care and the billing rules that govern it. This isn't general billing applied to oncology — it's specialized knowledge developed specifically for this specialty
• Drug wastage compliance -Full -JW and -JZ modifier compliance protects your practice from CMS audits and ensures every wasted drug is properly accounted for
• Prior authorization mastery - We manage the full authorization lifecycle for every oncology service that requires advance approval, preventing treatment delays and revenue loss
• Infusion coding precision -Correct sequencing, time-based coding, and bundling compliance across all infusion services from hydration to complex multi-drug chemotherapy regimens
• Denial rates reduced to ≤6% - Through proactive compliance, accurate coding, and documentation review, we keep denial rates well below the oncology industry average
• Faster cash flow - Average claim turnaround within 48–72 hours, with A/R days consistently in the 25–28 day range
• Revenue growth - Oncology practices that partner with MedFeeTree typically see 10–15% higher net collections compared to managing billing in-house

Measurable Performance Outcomes

• ≥95% clean claim rate across chemotherapy, infusion, and radiation services
• ≤6% denial rate for oncology claims
• 25–28 days average accounts receivable
• Up to 98% recovery of contracted drug reimbursement costs
• 30–40% improvement in patient collections through clear, structured statements
• 48–72 hour average claim turnaround time
• 10–15% increase in net collections for practices switching from in-house billing

Partner with MedFeeTree for Oncology Billing

Cancer care providers carry an extraordinary burden  clinical, emotional, and administrative. Your billing should never add to that burden. MedFeeTree's oncology billing specialists are here to ensure every service you provide is coded correctly, submitted promptly, and reimbursed fully.

Contact us today for a free oncology billing assessment and discover how much revenue your practice could be recovering.