C78.6: Secondary malignant neoplasm of retroperitoneum and peritoneum
C78.6, secondary malignant neoplasm of retroperitoneum and peritoneum, is listed as a covered diagnosis in 13 Medicare billing and coding articles that apply to 87 HCPCS Level II codes, including G0340 (Image-guided robotic linear accelerator-based stereotactic…), G0339 (Image-guided robotic linear accelerator-based stereotactic…), J0881 (Injection, darbepoetin alfa, 1 microgram (non-esrd use)). 4 of these codes have a 2026 DMEPOS fee schedule amount; E0783 pays $9,917.33 to $11,667.45 (NU) depending on the state. The articles come from 4 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with C78.6 as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| G0340 | Image-guided robotic linear accelerator-based stereotactic radiosurgery, delivery including collimator changes and custom plugging, fractionated treatment, all lesions, per session, second through fifth sessions, maximum five sessions per course of treatment | Carrier judgment | — | 2 |
| G0339 | Image-guided robotic linear accelerator-based stereotactic radiosurgery, complete course of therapy in one session or first session of fractionated treatment | Carrier judgment | — | 2 |
| J0881 | Injection, darbepoetin alfa, 1 microgram (non-esrd use) | Special coverage instructions apply | — | 3 |
| J0885 | Injection, epoetin alfa, (for non-esrd use), 1000 units | Special coverage instructions apply | — | 3 |
| Q5106 | Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units | Special coverage instructions apply | — | 3 |
| J0882 | Injection, darbepoetin alfa, 1 microgram (for esrd on dialysis) | Special coverage instructions apply | — | 3 |
| Q5105 | Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for esrd on dialysis), 100 units | Special coverage instructions apply | — | 3 |
| J0890 | Injection, peginesatide, 0.1 mg (for esrd on dialysis) | Carrier judgment | — | 3 |
| Q4081 | Injection, epoetin alfa, 100 units (for esrd on dialysis) | Special coverage instructions apply | — | 3 |
| J9217 | Leuprolide acetate (for depot suspension), 7.5 mg | Special coverage instructions apply | — | 1 |
| J1952 | Leuprolide injectable, camcevi, 1 mg | Carrier judgment | — | 1 |
| J3315 | Injection, triptorelin pamoate, 3.75 mg | Special coverage instructions apply | — | 1 |
| J1954 | Injection, leuprolide acetate for depot suspension (lutrate depot), 7.5 mg | Carrier judgment | — | 1 |
| J9202 | Goserelin acetate implant, per 3.6 mg | Special coverage instructions apply | — | 1 |
| J1950 | Injection, leuprolide acetate (for depot suspension), per 3.75 mg | Special coverage instructions apply | — | 1 |
| J3316 | Injection, triptorelin, extended-release, 3.75 mg | Special coverage instructions apply | — | 1 |
| J9218 | Leuprolide acetate, per 1 mg | Special coverage instructions apply | — | 1 |
| J9219 | Leuprolide acetate implant, 65 mg | Special coverage instructions apply | — | 1 |
| J9225 | Histrelin implant (vantas), 50 mg | Special coverage instructions apply | — | 1 |
| G0563 | Stereotactic body radiation therapy, treatment delivery, per fraction to 1 or more lesions, including image guidance and real-time positron emissions-based delivery adjustments to 1 or more lesions, entire course not to exceed 5 fractions | Carrier judgment | — | 1 |
| J0888 | Injection, epoetin beta, 1 microgram, (for non esrd use) | Special coverage instructions apply | — | 2 |
| J0887 | Injection, epoetin beta, 1 microgram, (for esrd on dialysis) | Special coverage instructions apply | — | 2 |
| Q0512 | Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period | Special coverage instructions apply | — | 2 |
| Q0511 | Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period | Special coverage instructions apply | — | 2 |
| Q5129 | Injection, bevacizumab-adcd (vegzelma), biosimilar, 10 mg | Carrier judgment | — | 1 |
62 more codes are listed. See every code with payment by region in Caduvo.
Medicare policy articles listing C78.6
- A52453: Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs (Wellpoint Federal (MAC - Part A, MAC - Part B); 10 Level II codes). LCD with the same title: L39387
- A56874: Billing and Coding: Stereotactic Radiation Therapy: Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT) (Wellpoint Federal (MAC - Part A, MAC - Part B); 3 Level II codes). LCD with the same title: L35076
- A52370: Billing and Coding: Bevacizumab and biosimilars (Wellpoint Federal (MAC - Part A, MAC - Part B); 8 Level II codes)
- A59350: Billing and Coding: Radiation Therapies (Palmetto GBA (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L39553
- A58982: Billing and Coding: Erythropoiesis Stimulating Agents (Palmetto GBA (MAC - Part A, MAC - Part B); 9 Level II codes). LCD with the same title: L39237
- A54768: Billing and Coding: Cardiac Blood Pool Imaging (Multiple Gated Acquisition Scanning- MUGA, Ventriculography) When Performed in Conjunction with Cardiotoxic Chemotherapy (Palmetto GBA (MAC - Part A, MAC - Part B); 5 Level II codes)
- A52479: Oral Anticancer Drugs - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC); 8 Level II codes). LCD with the same title: L33826
- A56462: Billing and Coding: Erythropoiesis Stimulating Agents (ESA) (CGS Administrators, LLC (MAC - Part A, MAC - Part B); 7 Level II codes). LCD with the same title: L34356
- A56748: Billing and Coding: White Cell Colony Stimulating Factors (Palmetto GBA (MAC - Part A, MAC - Part B); 16 Level II codes). LCD with the same title: L37176
- A52480: Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC); 19 Level II codes). LCD with the same title: L33827
- A60381: Billing and Coding: Erythropoiesis Stimulating Agents (Wellpoint Federal (MAC - Part A, MAC - Part B); 9 Level II codes). LCD with the same title: L39237
- A56695: Billing and Coding: Implantable Infusion Pump (Palmetto GBA (MAC - Part B); 9 Level II codes). LCD with the same title: L33461
- A57206: Billing and Coding: Lumbar MRI (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L34220
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Other C78 diagnoses (Secondary malignant neoplasm of respiratory and digestive organs)
- C78.00 — Secondary malignant neoplasm of unspecified lung
- C78.01 — Secondary malignant neoplasm of right lung
- C78.02 — Secondary malignant neoplasm of left lung
- C78.1 — Secondary malignant neoplasm of mediastinum
- C78.2 — Secondary malignant neoplasm of pleura
- C78.39 — Secondary malignant neoplasm of other respiratory organs
- C78.4 — Secondary malignant neoplasm of small intestine
- C78.5 — Secondary malignant neoplasm of large intestine and rectum
- C78.7 — Secondary malignant neoplasm of liver and intrahepatic bile duct
- C78.89 — Secondary malignant neoplasm of other digestive organs
Frequently asked questions
Does Medicare cover C78.6 (Secondary malignant neoplasm of retroperitoneum and…)?
Medicare covers items and services, not diagnoses. 13 Medicare billing and coding articles list C78.6 as a covered diagnosis for 87 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 C78.6?
The Level II codes from the policies most specific to this diagnosis are G0340 (Image-guided robotic linear accelerator-based stereotactic…, 2 articles); G0339 (Image-guided robotic linear accelerator-based stereotactic…, 2 articles); J0881 (Injection, darbepoetin alfa, 1 microgram (non-esrd use), 3 articles); J0885 (Injection, epoetin alfa, (for non-esrd use), 1000 units, 3 articles); Q5106 (Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for…, 3 articles). Code choice depends on the item supplied; check each code's descriptor.
What does Medicare pay for equipment billed with C78.6?
Under the 2026 DMEPOS fee schedule (non-rural state fees): E0783 $9,917.33 to $11,667.45 (NU); E0786 $10,969.75 to $11,380.88 (NU); E0782 $5,200.92 to $6,118.73 (NU); E0785 $572.38 to $673.39 (KF). Medicare pays 80% of the allowed amount after the Part B deductible.
Which Medicare policy articles list C78.6?
A52453 (Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs); A56874 (Billing and Coding: Stereotactic Radiation Therapy: Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT)); A52370 (Billing and Coding: Bevacizumab and biosimilars), and 10 more articles.
What is ICD-10-CM code C78.6?
C78.6 is the ICD-10-CM code for secondary malignant neoplasm of retroperitoneum and peritoneum, in category C78 (Secondary malignant neoplasm of respiratory and digestive organs), chapter 2: Neoplasms.
Next steps
- Run a reimbursement report for a device billed under G0340
- Watch G0340 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0340
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.