Summary & Overview
HCPCS M1156: Active Chemotherapy Received During Measurement Period
HCPCS Level II code M1156 documents that a patient received active chemotherapy at any time during a defined measurement period. This code is used in quality measurement, care coordination, and reporting contexts to indicate exposure to systemic oncology treatment. Nationally, accurate capture of chemotherapy administration is important for quality metrics, population health management, and continuity of care for patients with cancer.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical meaning, typical settings where the service is delivered, and the role the code plays in measurement frameworks. The publication also covers common billing modifiers associated with infusion and procedural services, payer coverage considerations, and where this code fits within oncology service lines.
The analysis provides benchmarks and policy context relevant to national reporting, clarifies typical sites of service and service line alignment for oncology practices, and outlines practical coding considerations where available. Data not available in the input is noted explicitly when applicable.
Billing Code Overview
HCPCS Level II code M1156 indicates that a patient received active chemotherapy any time during the measurement period. This billing code is used to capture the occurrence of active systemic cancer treatment for a patient within a defined reporting or measurement timeframe.
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Service type: Active chemotherapy administration and management
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Typical site of service: Infusion center, outpatient oncology clinic, hospital outpatient department
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with metastatic colorectal cancer attends an oncology infusion center for systemic chemotherapy during the measurement period. The patient is evaluated by the oncology nurse and medical oncologist, vital signs are obtained, lab results (CBC, CMP) are reviewed to confirm eligibility for treatment, and the chemotherapy regimen is prepared by pharmacy and administered intravenously. Documentation includes diagnosis, regimen, agents and doses, start and stop times, patient tolerance, any pre-medications given, and discharge instructions. Billing captures active chemotherapy during the measurement period using code M1156 and may include applicable modifier codes for circumstance-specific reporting. Typical sites of service include hospital outpatient infusion centers, freestanding oncology infusion clinics, and physician office infusion suites. Typical supporting workflow steps: patient check-in and consent, clinical assessment and lab review, chemotherapy order verification and compounding, IV access and administration by oncology nursing, monitoring during and after infusion, and documentation of adverse reactions or treatment delays.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when chemotherapy administration requires substantially greater resources than usual (e.g., complex vascular access, extensive counseling documented). |