Last reviewed: October 2026
The CPT code for a routine lab draw is 36415: collection of venous blood by venipuncture. It’s billed once per patient encounter, no matter how many tubes are drawn, and it’s separate from the codes for the lab tests themselves. This guide covers when to bill 36415, the other blood collection codes, Medicare rules and the mistakes that get lab draw claims denied.
What Is the CPT Code for a Lab Draw?
Use 36415 when clinical staff draw blood from a vein with a needle for lab testing. Other collection methods have their own codes:
| Code | What it covers | Billing notes |
|---|---|---|
| 36415 | Routine venipuncture (venous blood draw) | Once per encounter; the most common lab draw code |
| 36416 | Capillary blood collection (finger, heel or ear stick) | Medicare bundles it and never pays it separately |
| 36410 | Venipuncture, age 3 or older, needing a physician’s or qualified professional’s skill | Only when routine venipuncture by staff was tried and failed; not for routine draws |
| 36591 | Blood collection from an implanted venous access device (port) | Only with lab services; not with other services the same day |
| 36592 | Blood collection from a peripheral or central venous catheter | Only with lab services; not with other services the same day |
| G0471 | Venipuncture or urine collection by catheter for a patient in a skilled nursing facility, or by a lab on behalf of a home health agency | Medicare HCPCS code; use instead of 36415 in these settings |
36415 Billing Rules
Once per encounter
One unit of 36415 covers all venipunctures during one encounter, even if several tubes are drawn or the first stick fails. A redraw because the first specimen was unusable isn’t billed again. Medicare’s unit limit allows a second 36415 on the same date only for a separate, medically necessary encounter, and the record should show why.
Who bills the draw
The provider who collects the specimen bills 36415. If your office draws the blood and sends it to an outside lab that bills the tests itself, your office bills only 36415 and the lab doesn’t bill it again. If your office performs the tests or bills them, 36415 goes on the same claim as the tests.
Diagnosis codes
There’s no separate diagnosis for the draw. Link 36415 to the same ICD-10 codes that support the tests ordered.
Medicare payment
Medicare pays 36415 as a specimen collection fee from the Clinical Laboratory Fee Schedule, so it isn’t paid under the Physician Fee Schedule. The amount is small, so check the current fee schedule rather than relying on old rates. For home or nursing facility draws, Medicare also has travel allowance codes (P9603 and P9604) that a lab may bill when its staff travel to collect the specimen.
Common 36415 Denials and How to Avoid Them
- More than one unit for one encounter: bill one unit, whatever the number of tubes or sticks.
- Billed by both the office and the outside lab: only the one who drew the blood bills it.
- 36416 billed to Medicare: capillary collection is bundled and isn’t paid separately.
- 36410 for a routine draw: 36410 is only for draws that need a physician’s skill after staff couldn’t get the sample.
- 36591 or 36592 with non-lab services: for example, with chemotherapy on the same day.
- No lab test on the claim or in the record: the draw has to support an ordered test.
Examples
Office draw, test sent out: A provider orders a lipid panel. The medical assistant draws the blood and sends it to a reference lab, which bills the lipid panel. The office bills 36415 only.
Office draw, in-house test: A provider orders a CBC with differential, and the office runs it on its own analyzer. The office bills 85025 and 36415 on the same claim, with its CLIA number. See our guide to CBC CPT codes for more.
Port draw: A patient with an implanted port has blood drawn from it for labs only. Bill 36591, not 36415.
Lab draws are a small fee, but billing them wrong across thousands of claims adds up. Our laboratory billing services handle collection fees, test coding and denials for labs and physician office labs. For the full workflow, see the laboratory billing process.
FAQs
What is the CPT code for a lab draw?
36415, collection of venous blood by venipuncture. Use 36416 for a finger stick, and 36591 or 36592 for draws from a port or catheter.
Can 36415 be billed more than once a day?
Only for a separate, medically necessary encounter on the same day. Multiple tubes or sticks in one encounter count as one unit.
Can I bill 36415 if an outside lab runs the tests?
Yes. The office that draws the blood bills 36415, and the outside lab bills the tests. The lab shouldn’t bill the draw too.
Does Medicare pay for 36416?
No. Medicare bundles capillary blood collection into other services and doesn’t pay it separately.
What code is used for a blood draw in a nursing home?
For Medicare patients in a skilled nursing facility, or draws by a lab on behalf of a home health agency, use G0471 instead of 36415.
