Precision Reimbursements for Complex Cancer Care

Oncology Billing Services

AnnexMed is a trusted oncology medical billing company for oncology practices, infusion centers, and hospital-based cancer programs. Our specialists navigate the intricate world of oncology billing and coding, from chemotherapy infusion rules to payer-specific drug guidelines, ensuring claims are accurate, compliant, and reimbursed without delay.

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Oncology RCM That Understands the Complexity of Cancer Care

In oncology medical billing, every claim tells the story of a complex care journey. It’s not just about CPT or HCPCS codes, it’s about documenting drug administration, managing prior authorizations, billing wastage, and aligning with strict payer rules. AnnexMed’s oncology medical billing services cover intake to collections: eligibility verification, prior authorization, coding, claims submission, denial management, and AR follow-up. Whether you are an independent oncology practice or a hospital-based cancer center, we tailor workflows to your specific needs.

Oncology Billing Challenges That Drain Revenue

Oncology billing is among the most complex in healthcare. High-cost drugs, multi-hour infusions, and strict compliance rules mean even small mistakes create large financial losses.

Prior authorization breakdowns

Expensive oncology drugs administered without pre-approval lead to automatic denials.

Incorrect infusion coding

Errors in oncology billing codes for initial vs. sequential vs. concurrent chemotherapy sessions cause underpayments.

Drug wastage not reported

Unused vials not billed with modifier JW or JZ result in lost reimbursement opportunities.

Clinical trial billing errors

Misalignment of research vs. routine care charges creates compliance and audit risks.

Non-compliance with oncology billing guidelines

Overlooking time-based infusion documentation, drug units, or NCCI edits stalls payments.

Eligibility verification gaps

Patients not pre-checked for oncology benefits face claim denials and delayed treatment reimbursement.

Why Oncology Practices Choose AnnexMed?

As one of the leading oncology billing companies, AnnexMed delivers unmatched accuracy, compliance, and revenue protection for cancer care providers.

AnnexMed manages medical billing for oncology at scale, covering private practices, hospital departments, and infusion centers, while staying aligned with payer requirements.
We implement payer-driven compliance rules, preventing denials tied to infusion start/stop times, drug units, or medical necessity gaps.
Our RCM specialists handle chemo, immunotherapy, supportive drugs, and radiation-related billing, ensuring correct application of oncology billing codes and modifiers.
We provide analytics that track underbilled infusions, missed wastage claims, and payer underpayments, giving oncology practices actionable insights.
Onboarding is seamless, AnnexMed integrates into oncology EMRs and practice systems while providers focus on patient care.

Don’t let coding errors dilute your claims, secure your oncology revenue today

Our Oncology Medical Billing Services

Oncology billing services demand precision at every step, drug units, infusion coding, prior authorizations, and payer-specific guidelines. AnnexMed delivers end-to-end support so oncologists can focus on patients while we protect their revenue.

Infusion & Drug Administration Coding

We manage initial, sequential, and concurrent infusion coding (96413, 96415, 96417) with accurate drug units and modifier usage.

Prior Authorization for Oncology Treatments

Securing approvals for chemotherapy, immunotherapy, and supportive drugs before administration to avoid high-value denials.

Claims Submission & Eligibility Verification

Submitting claims under oncology billing guidelines, with upfront benefit verification and payer-specific coverage checks.

Oncology Billing Compliance & NCCI Edits

We ensure claims adhere to oncology billing guidelines, including infusion time documentation, drug units per HCPCS, and NCCI bundling rules.

Accounts Receivable Follow-Up

Our AR team aggressively pursues unpaid claims, resolving denials linked to medical necessity, drug units, wastage modifiers, infusion coding, and eligibility mismatches.

Clinical Trial & Supportive Care Billing

Managing research vs. routine care separation, while capturing supportive treatments like antiemetics and growth factors correctly.

Adhering to Industry Standards

Delivering Oncology Billing With Compliance at Its Core

Compliance in oncology medical billing services goes beyond checking for errors, it safeguards every claim against payer scrutiny, denials, and audit risk. AnnexMed integrates oncology billing guidelines into each stage of the revenue cycle, ensuring accuracy and accountability.

We back this with system-led audit trails, payer-specific policy enforcement, and quarterly compliance drills. From intake to collections, every oncology claim is protected by layered controls, real-time alerts, and ongoing staff training. This approach minimizes risk, prevents denials, and keeps your practice audit-ready at all times.

SOC 2 Type 1

Reporting on controls at a service organization

ISO 27001:2022

Securing and protecting information

ISO 9001:2015

Achieving quality policy and quality objectives

SOC 2 Type 2

Implemented the SOC 2 approved by AICPA

Case Studies

How Healthcare Teams Are Winning with AnnexMed

From Errors to Excellence! Florida Ortho Practice Hits 95% Coding Accuracy

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Case Studies

How Healthcare Teams Are Winning with AnnexMed

Turning Around Aged AR in 90 Days: A Multi-Specialty Case Study

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Less Claim Rework

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Featured Blog

Common Mistakes in Oncology Medical Billing and How to Avoid Them

FAQs in Outsourcing Oncology Billing Services

How does chemotherapy infusion billing differ from standard medical billing?

Chemotherapy and infusion claims require precise sequencing of oncology billing codes (initial, sequential, concurrent), documentation of start/stop times, and correct drug unit billing. Unlike standard visits, payer reimbursement depends on these details being exact.

Why do payers deny oncology claims even when treatment was medically necessary?

Denials often occur when prior authorization wasn’t secured, ICD-10 codes don’t match the therapy, or documentation fails payer-specific oncology billing services rules for medical necessity.

What safeguards do oncology billing companies use to prevent payer audits?

AnnexMed builds compliance into workflows with audit trails, real-time alerts, and layered checks across eligibility, drug units, and oncology Coding

What happens if drug wastage isn’t reported correctly in oncology billing?

Unreported wastage leads to lost revenue on high-cost drugs. AnnexMed applies JW/JZ modifiers in line with oncology billing guidelines so every vial is reimbursed appropriately.

How do oncology billing services manage clinical trial billing without compliance risks?

We separate routine care from research charges in oncology medical billing services, ensuring payers are billed only for covered services and protecting practices from audit exposure.

How do oncology billing guidelines affect infusion time documentation and coding accuracy?

Payers require infusion times, drug strength, and units per vial for accurate claims. AnnexMed aligns coding with oncology billing guidelines to prevent denials.

Protect Every Dollar Behind Every Dose.

With AnnexMed’s oncology billing services, your life-saving treatments never go unpaid.

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Whether you need full-scale support or help with just one part of the revenue cycle, AnnexMed offers modular services tailored to your most pressing needs.

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