Summary & Overview
HCPCS Level II M1435: Patient on Oral Chemotherapy
HCPCS Level II code M1435 identifies patients who are on oral chemotherapy during the performance period. The code captures treatment status—documenting that a patient is actively receiving an oral antineoplastic regimen—and is used in billing and quality measurement contexts where oral cancer therapy must be tracked. Nationally, accurate capture of oral chemotherapy status matters for care coordination, adherence monitoring, and reporting of oncology performance measures.
Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what the code represents, typical service settings, and how the code is used operationally. The publication outlines common reporting contexts and benchmarks where available, highlights relevant clinical context for oncology teams and revenue cycle staff, and summarizes policy or coverage considerations that commonly affect oral chemotherapy documentation. Where input data are not provided, the report notes that specific fields are unavailable.
Billing Code Overview
HCPCS Level II code M1435 denotes a patient who is on oral chemotherapy during the performance period. This code documents the presence of an active oral chemotherapy regimen for the patient and is used to capture treatment status rather than a specific drug administration event.
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Service type: Ongoing oncology medication management and monitoring
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Typical site of service: Outpatient oncology clinics, infusion centers (for concurrent services), and ambulatory care settings where oral chemotherapy is prescribed or managed
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with stage IIIC colon adenocarcinoma receives an oral chemotherapy agent (for example, capecitabine) as part of an outpatient oncology treatment plan. The patient is evaluated in the oncology clinic for treatment initiation and then monitored during the performance period by the oncology nurse and medical oncologist. Clinical workflow includes baseline assessment (history, physical exam, performance status), verification of the oral chemotherapy prescription and dosing, counseling on administration and adverse effects, pharmacy coordination for medication dispensing and benefit verification, documentation of adherence and toxicities during follow-up visits or telephone triage, and coordination of lab monitoring (complete blood count, liver function tests, renal function) as required by the regimen. The service represented by M1435 documents that the patient was on oral chemotherapy during the performance period and is typically generated by the treating oncology practice or clinic during quality reporting, billing reconciliation, or clinical documentation processes. Typical site of service is an outpatient oncology clinic or ambulatory infusion/oncology practice setting.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable E/M service on the same day as a procedure | When a distinct evaluation is performed the same day as another procedure encounter |