Summary & Overview
CPT 36592: Blood Specimen Collection from Established Catheter
CPT code 36592 covers collection of a blood specimen from an established central or peripheral catheter when no other code applies. Nationally, this code matters for clinical workflows and billing accuracy because it captures a distinct method of specimen collection tied to patients with indwelling vascular access devices. Proper use affects payment categorization and documentation of specimen source.
Key payers in typical analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code's clinical intent, common sites of service, and where it fits within outpatient and inpatient specimen collection practices. The publication also outlines typical payer considerations, common modifiers encountered in claim edits, and related coding contexts.
This resource provides benchmarks and coding guidance context, summarizes relevant policy updates where available, and clarifies clinical scenarios that commonly prompt use of CPT code 36592. Data not available in the input is clearly noted where applicable.
Billing Code Overview
CPT code 36592 describes the collection of a blood specimen from an established central or peripheral catheter when the procedure is not otherwise specified by another code. The service involves obtaining blood for laboratory testing via an existing vascular access device rather than by peripheral venipuncture.
The typical site of service for this procedure is inpatient or outpatient settings where patients have an indwelling central or peripheral catheter, including hospital wards, infusion centers, emergency departments, and outpatient clinics. The procedure applies to established catheters already in place and does not include placement, replacement, or other catheter-related interventions.
Clinical & Coding Specifications
Clinical Context
A hospitalized adult with a tunneled central venous catheter (e.g., Port-a-Cath) requires routine laboratory monitoring for sepsis evaluation and medication-level checks. The bedside nurse or phlebotomist obtains a blood specimen directly from the established central catheter because peripheral venipuncture is contraindicated due to difficult veins or patient anticoagulation. The workflow includes verification of orders, hand hygiene, aseptic cap removal and hub disinfection, aspiration of waste/flush as per facility protocol, collection of required tubes in proper order, labeling at bedside, application of hemostasis or positive-pressure cap, documentation in the electronic medical record, and transport of specimens to the laboratory. Procedure is billed by the provider performing the collection from the existing central or peripheral catheter when no other specific catheter-based collection CPT code applies, using 36592.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the same day | When an E/M visit is provided the same day as the blood draw and the E/M meets criteria for separate reporting |
59 |