Summary & Overview
CPT 36400: Venipuncture for Venous Blood Collection
CPT code 36400 represents venipuncture, the puncture of a vein to obtain venous blood samples or to establish intravenous access for drug infusion. This fundamental procedure underpins routine laboratory testing and acute care management across inpatient and outpatient settings, and it is one of the most frequently billed short technical services in ambulatory and hospital workflows. Nationally, proper coding and documentation of venipuncture affect payment accuracy, encounter reporting, and lab-service workflows.
Key payers commonly referenced in reimbursement and coverage discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and the federal Medicare program. Readers will find practical context on the clinical purpose and typical settings for the service, plus coverage and benchmarking considerations as they relate to these major national payers. The publication outlines how CPT code 36400 is used in claims, highlights common service lines where the code appears, and summarizes policy or documentation factors that frequently influence claim adjudication. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 36400 describes venipuncture, the puncture of a vein to obtain a venous blood sample or to provide intravenous infusion of drugs. The procedure commonly uses a small-gauge needle or a butterfly needle with a flexible tube when appropriate. Typical anatomic sites include the jugular, femoral, median cubital, and scalp veins. In children under three years, the scalp vein is frequently preferred due to prominence and ease of access.
Service type: Venous blood collection or intravenous access for infusion.
Typical site of service: Inpatient and outpatient settings where venous access or blood sampling is performed, including hospital wards, emergency departments, outpatient clinics, and pediatric settings.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45-year-old adult presenting to an outpatient laboratory or emergency department for venous blood sampling to evaluate abnormal laboratory values or to obtain specimens for routine screening. The clinician orders basic metabolic panel, complete blood count, and coagulation studies. A phlebotomist or registered nurse performs 36400 venipuncture at a peripheral site (median cubital or cephalic vein in the antecubital fossa). The workflow includes patient identification and consent, site selection and preparation with antisepsis, application of a tourniquet, venipuncture using an appropriate needle or butterfly set, collection of required tubes in correct order, labeling at bedside, and post-collection hemostasis. Typical sites of service include outpatient laboratory, ambulatory clinic, emergency department, inpatient nursing unit, and pediatric clinic (scalp vein in infants under three years). Clinical indications include diagnostic testing, medication level monitoring, infection workup, preoperative testing, and intravenous access for fluids or medications when indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when reporting only the physician professional component of a service when applicable (rare for venipuncture). |