Blood courier services move two very different things: diagnostic blood samples going from a clinic or hospital to a lab, and blood components (red cells, platelets, plasma) going between blood suppliers and hospital transfusion services. Samples are regulated mainly as a shipping matter, while components have federal storage and shipping temperatures and a hospital blood bank that decides whether a unit is still usable when it arrives.
This guide is for lab managers, transfusion service supervisors and hospital operations staff who book or oversee those runs. It covers the temperature rules for each component, how validated coolers and time limits work, what happens during a STAT transfer between hospitals, and what records you should expect from the driver.
One note up front. Your blood bank’s own procedures, built on its accreditation standards and supplier agreements, always come first. What follows explains the regulations and common practice so you can ask your courier the right questions.
Power House Courier runs HIPAA-compliant, UN3373-certified specimen and medical deliveries 24/7 across California, Arizona and Texas. A dispatcher answers in under 15 minutes.
TL;DR
- Diagnostic blood samples usually ship as UN3373 Biological Substance, Category B, in triple packaging under 49 CFR 173.199.
- Under 21 CFR 600.15, liquid red blood cells must be kept between 1 and 10°C during shipment, and frozen plasma and cryoprecipitate at -18°C or colder.
- Platelets stored at 20 to 24°C must be shipped as close as possible to that range, while cold-stored platelets ship at 1 to 10°C.
- One published hospital blood bank policy gives a red cell unit 30 minutes outside monitored storage before it must be packed on ice or returned, so couriers can’t leave coolers open at the dock.
- A hospital should require a courier to use the packing its blood bank specifies, keep units upright and separated by type, and hand over signed transfer paperwork at every step.
Blood samples and blood components are two different jobs
A blood sample is a tube drawn for testing. It might be a routine chemistry panel, a crossmatch specimen going to a reference lab, or a research draw. It’s a diagnostic specimen, and in transport terms it is usually shipped as UN3373, Biological Substance, Category B.
Under 49 CFR 173.199, Category B material needs triple packaging: a leakproof primary tube, leakproof secondary packaging with absorbent material, and a rigid outer package that can pass a 1.2 meter drop test. The outer package carries the UN3373 diamond mark and the words “Biological substance, Category B.” Temperature for samples is set by the testing lab, and it varies by test. Some tubes ride at room temperature, some on cold packs, some frozen.
A blood component is a unit intended for transfusion. Red blood cells, platelets, plasma and cryoprecipitate each have storage conditions set by FDA regulations in 21 CFR Part 640 and shipping temperatures in 21 CFR 600.15. A unit that arrives outside those conditions may be unusable, and the receiving blood bank is the one who decides.
The two jobs often share a vehicle. A courier might pick up a cooler of red cells and a bag of specimens from the same hospital. They still need separate packaging and separate paperwork, and the driver needs to know which is which before the first stop.
Storage and shipping temperatures for blood components
The table below pulls together the federal storage rules, the federal shipping rules and one hospital’s documented transport method as an example. The storage figures come from 21 CFR 640.11 for red cells, 21 CFR 640.25 for platelets and 21 CFR 640.34 for plasma. Shipping figures come from 21 CFR 600.15. The transport method column is from the University of Toledo Medical Center blood bank policy, which is public and cites AABB standards.
| Product | Storage | Shipping temperature | Example transport method |
|---|---|---|---|
| Red blood cells (liquid) | 1 to 6°C | 1 to 10°C | Wet ice equal in volume to the units, or frozen coolant not touching the units |
| Whole blood, from storage | 1 to 6°C (hospital policy) | 1 to 10°C | Same as red cells |
| Platelets, room temperature | 20 to 24°C with continuous gentle agitation | As close as possible to 20 to 24°C | Platelet box, no ice |
| Platelets, cold stored | 1 to 6°C, agitation optional | 1 to 10°C | Wet ice, as for red cells |
| Fresh frozen plasma and plasma | -18°C or colder | -18°C or colder | Dry ice |
| Liquid plasma | 1 to 6°C | Per label and blood bank procedure | Per blood bank procedure |
| Cryoprecipitated AHF | -18°C or colder (hospital policy) | -18°C or colder | Dry ice |
| Diagnostic blood samples | Set by the testing lab | Set by the testing lab | UN3373 triple packaging |
Two details matter most for drivers. First, red cells and platelets are handled at opposite temperatures, so they should never share a cooler. Second, the federal rule for room-temperature platelets asks for “all reasonable methods” to hold them near 20 to 24°C, which in practice means keeping the platelet box out of a hot trunk in July and away from ice.
Whole blood coming straight from a collection site to a processing lab follows a separate rule in 600.15: it may be cooled toward 1 to 10°C, or kept as close as possible to 20 to 24°C for no more than 6 hours. That mostly affects blood supplier runs, not hospital transfers.
Coolers, packing and time limits
The cooler is where most of the risk sits. A transport container for blood should be validated by the blood bank that packs it, which means someone has tested that box, with that coolant and that load, and recorded how long it holds the required range. The courier shouldn’t substitute a different box or add ice on their own judgment.
The University of Toledo policy gives a concrete picture of how one hospital does it. Red cell products ship in Red Cross blood boxes with wet ice equal in volume to the red cells, or with frozen coolant that doesn’t touch the units, to hold 1 to 10°C. Frozen plasma and cryoprecipitate ship with dry ice, and pheresis platelets ship in a platelet box at 20 to 24°C. Your blood bank’s method may differ. The point is that it’s written down, and the courier should follow it exactly.
Time is the other limit. The same policy says a red cell unit that won’t be transfused within 30 minutes must be stored on ice with a temperature indicator, or returned to the monitored refrigerator within 30 minutes. Your own blood bank may set a different window, but either way a courier who waits at a loading dock with a cooler open is creating a problem for someone. Pack, close, go.
Hand-offs should be timed too. If a cooler is validated for a set number of hours, the driver needs to know that number and the time the box was packed.
STAT transfers between hospitals and blood suppliers
A STAT blood run usually starts when a hospital runs short of a product during a trauma or surgery, or when a patient needs a rare unit that another facility holds.
In the Toledo policy, in-date transfers between hospitals are recorded in the supplier’s electronic system, the sending hospital signs a storage certification statement on the transfer form, and the receiving blood bank checks that statement before accepting the units into inventory. The sending hospital also calls ahead to the receiving blood bank. A courier fits into that process as the documented link between two signatures.
Speed matters, but so does the handoff. The driver should know exactly where the receiving blood bank is (not just the hospital’s main address) and who will sign. Emergency departments and main lobbies are the wrong place to leave a cooler. Our guide to STAT courier service in Los Angeles covers timing and dispatch for urgent medical runs in more detail.
Cord blood kits and other specialty pickups
Cord blood is a distinct run. FDA explains that cord blood is the blood in the placenta and umbilical cord, that public banks store it for anyone who may need it, and that private banks store it for the child or close relatives. Cord blood for unrelated patients is regulated as a biological product, and private banks still have to meet FDA registration, donor screening, testing and labeling requirements.
For a courier, the collection kit is usually supplied by the cord blood bank with its own packing and temperature instructions, and the pickup happens at a hospital’s labor and delivery unit at whatever hour the baby arrives. The bank’s instructions govern the shipment. Our cord blood courier page describes how those pickups are arranged.
Organ transport is sometimes grouped with blood work in searches, but it’s a separate service with its own protocols. See our organ transport page for that service.
Chain of custody and transfer paperwork
Every handoff in a blood transfer should leave a record. For a courier run, that means the time the cooler left the sending blood bank, who released it, the time it arrived, and who received it. If the hospital uses a temperature indicator or data logger, the reading at receipt belongs in the record as well.
For diagnostic samples, the chain is lighter but still matters, especially for specimens tied to legal or employment testing. Our post on temperature logs, HIPAA and chain of custody explains what a courier’s records should include.
What hospitals should require from blood courier services
Before a courier carries a single unit, the transfusion service should agree on a written process. It doesn’t need to be long. It should say who packs the cooler, which containers and coolants are validated, how units are kept upright and separated by product type, and what the driver does if a delivery can’t be completed.
Ask any courier you’re considering these questions:
- Will drivers carry only the containers your blood bank packs and sealed, without opening them?
- Can dispatch reach a driver in minutes for a STAT transfer, around the clock?
- How are pickup and delivery times, names and signatures captured, and how quickly can you get them?
- Are drivers trained on UN3373 packaging for samples and on dry ice handling?
- What happens if a vehicle breaks down with blood on board?
Our medical courier page and our hospital logistics page explain how we approach this work. Whatever courier you choose, run a test transfer with a dummy cooler before you rely on it at 2 a.m.
Related guides: diagnostic blood samples follow the specimen rules in our biological sample courier guide. When choosing a vendor, use the HIPAA-compliant courier checklist, and research sites can see how clinical trial courier services handle kits and central lab shipments.
Frequently asked questions
What temperature must red blood cells be kept at during transport?
Under 21 CFR 600.15, liquid red blood cells must be kept between 1 and 10°C during shipment. They are stored at 1 to 6°C in the blood bank. Hospitals typically pack them in a validated cooler with wet ice or frozen coolant that doesn’t touch the units. Your blood bank’s procedure sets the exact packing.
Can platelets and red cells go in the same cooler?
No. Room-temperature platelets are kept as close as possible to 20 to 24°C, while red cells ship at 1 to 10°C. Putting them together would push one or both out of range. Cold-stored platelets are the exception, since they ship at 1 to 10°C, but follow your blood bank’s packing instructions.
How are blood samples shipped to a lab?
Most diagnostic blood samples ship as UN3373 Biological Substance, Category B. That requires a leakproof primary tube, leakproof secondary packaging with absorbent material, and a rigid outer box marked with the UN3373 diamond. The testing lab decides whether the sample travels at room temperature, refrigerated or frozen.
What is the 30-minute rule for blood?
It’s a limit on how long a red cell unit can sit outside monitored storage. The University of Toledo Medical Center’s published policy, for example, requires the unit to go on ice with a temperature indicator or back into the monitored refrigerator within 30 minutes. Your blood bank sets its own rule, so ask before a courier handles units.
Who is responsible for packing blood for transport?
The sending blood bank or lab packs the shipment, using containers and coolants it has validated. The courier carries the sealed container, keeps it upright and away from heat or cold, and delivers it to the named recipient with the paperwork. A courier shouldn’t repack or add coolant unless the blood bank’s procedure says so.
Do blood courier services handle cord blood?
Many do. Cord blood banks usually supply their own collection kit with packing and temperature instructions, and the courier picks it up from the hospital’s labor and delivery unit, often at night or on weekends. The bank’s instructions govern how the kit is handled in transit.
Power House Courier runs HIPAA-compliant, UN3373-certified specimen and medical deliveries 24/7 across California, Arizona and Texas. A dispatcher answers in under 15 minutes.
Sources
- 21 CFR 600.15, Temperatures during shipment (Cornell LII)
- 21 CFR 640.11, General requirements for Red Blood Cells (Cornell LII)
- 21 CFR 640.25, General requirements for Platelets (Cornell LII)
- 21 CFR 640.34, Processing of Plasma (Cornell LII)
- 49 CFR 173.199, Category B infectious substances (Cornell LII)
- University of Toledo Medical Center, Policy 3364-108-202: Blood and Component Storage, Expiration, and Transportation
- FDA: Cord Blood Banking, Information for Consumers
Need blood, samples or a cord blood kit moved today? Call dispatch at (323) 744-1900 or request a quote.
Last reviewed: September 2026 by the Power House Courier dispatch team.
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