Gynecologic Oncology Billing Services

Gynecologic oncology billing combines major cancer surgery with medical oncology services. A single patient may have a complex debulking operation, chemotherapy infusions, imaging and long-term surveillance. Surgeries often involve several procedures in one session, and payers apply multiple-procedure and assistant rules.

Practices that give chemotherapy in the office also bill for drugs, which brings supply costs, authorizations and tight documentation. Westmont Revenue Partners connects gynecologic oncology groups with vetted medical billing experts who understand both sides of the work. This page explains the main services and the billing problems that affect gynecologic oncology billing most.

Who this is for

• Gynecologic oncologists in private and hospital-employed groups
• Academic cancer center practices
• Practices that operate an infusion suite
• Nurse practitioners and physician assistants supporting oncology care
• Groups that co-manage patients with medical and radiation oncology

What gets billed

• New patient consultations and follow-up visits
• Hysterectomy, including radical procedures
• Removal of ovaries and fallopian tubes
• Staging surgery with lymph node removal
• Omentectomy and tumor debulking
• Minimally invasive and robotic cancer surgery
• Chemotherapy administration
• Chemotherapy and supportive drugs
• Surveillance visits and survivorship care
• Colposcopy and biopsy for precancer care

Commonly billed codes

Code	Type	What it covers
58150	CPT	Total abdominal hysterectomy with or without removal of tubes and ovaries
58952	CPT	Ovarian, tubal or peritoneal cancer surgery with removal of tubes, ovaries and omentum, plus radical tumor debulking
58953	CPT	Radical debulking with removal of uterus, tubes and ovaries, plus omentectomy
38571	CPT	Laparoscopic pelvic lymph node removal
96413	CPT	Chemotherapy infusion, first hour
96415	CPT	Chemotherapy infusion, each additional hour
96367	CPT	Additional sequential infusion of a different drug
99205	CPT	New patient office visit, high complexity
57454	CPT	Colposcopy with cervical biopsy and endocervical curettage
C56.9	ICD-10-CM	Malignant ovarian cancer, unspecified side
C54.1	ICD-10-CM	Malignant cancer of the endometrium

Note

Codes are examples for orientation, not a complete list, and do not guarantee coverage or payment. Always check current code sets and payer policy.

Billing challenges in gynecologic oncology

• Multiple procedures in one surgery. Cancer operations often include several components. Billers check bundling edits and use modifiers only when documentation supports them.
• Assistant and co-surgeon billing. Complex cases may involve a second surgeon. Payers differ on whether and how they pay for assistants, so billers verify each policy before submitting.
• Infusion timing and documentation. Chemotherapy codes depend on start and stop times and the drugs given. Nurses and billers need matching records so hours are billed correctly.
• Drug billing and units. Drugs are billed by HCPCS code with units that must match what was given, including any wasted portion. Billers reconcile pharmacy records to the claim.
• Prior authorization. Many payers require approval for chemotherapy regimens and certain surgeries. Staff track authorizations and expiry dates by patient.
• Diagnosis specificity. Cancer diagnosis codes depend on site, behavior and sometimes laterality. Vague codes can cause denials or prevent drug coverage.
• Global surgical periods. Post-operative visits inside the global period are usually not billed separately, but unrelated problems may be. Billers separate these carefully.

How Westmont can help

• Match your group with vetted billing experts experienced in gynecologic oncology
• End-to-end revenue cycle support across surgery, clinic and infusion services
• Denial management, including appeals for authorization and bundling denials
• Help with provider credentialing and payer enrollment
• Regular reports on denials and open claims

Frequently asked questions

How are cancer debulking surgeries billed?

Debulking has specific codes that depend on the procedure and what was removed. Operative notes must describe each component clearly. Billers match the report to the code set and check payer rules for bundling.

Can an assistant surgeon be billed in gynecologic oncology?

Often, yes, when the case is complex and the payer allows it. Rules vary by payer and by procedure. Verify the policy before the case and document the assistant's role in the operative note.

How do we bill chemotherapy in the office?

Administration is billed by time and type of infusion, and drugs are billed separately with units. Records must show start and stop times, the drug and dose. Check payer authorization requirements for each regimen.

Why are oncology drug claims denied?

Common causes include missing authorization, wrong units, a diagnosis that does not support the drug, or incomplete documentation. A pre-bill review process can catch many of these.

Does the global period apply to cancer surgery?

Major surgeries have a post-operative global period, and routine follow-up visits are generally included. Unrelated visits and chemotherapy management may be billable. Confirm current rules with each payer.

Related billing services

• Medical Oncology
• Surgical Oncology
• Radiation Oncology
• OB/GYN
• Infusion Centers