Nighthawk radiology is overnight teleradiology coverage in which off-site radiologists read emergency and after-hours imaging studies while your local group sleeps. AstraRad provides nighthawk coverage with a critical difference: every overnight report is a final signed subspecialist read, not a preliminary that your radiologists must re-read in the morning. Our median STAT turnaround is 28 minutes, our SLA compliance is 99.4% over the trailing 12 months, and coverage runs 24/7/365 across a network of 240 board-certified, fellowship-trained subspecialists.
What is nighthawk radiology?
The term comes from the early days of teleradiology, when US hospitals began transmitting overnight emergency studies to radiologists working daytime hours in other time zones. The model solved a real problem: emergency departments generate imaging around the clock, but most radiology groups cannot staff a radiologist at 3 a.m. without burning out their roster or paying unsustainable call premiums.
Modern nighthawk coverage works the same way at its core. Your facility acquires the study, the images transmit via DICOM to a remote radiologist who is awake and on shift, and a report comes back within a defined turnaround window. The emergency physician gets an answer, the patient gets a disposition, and your local radiologists get a full night of sleep.
Where nighthawk services differ sharply is in what kind of report comes back. That difference determines how much work is actually being taken off your group's plate.
Final reads vs the traditional preliminary-read nighthawk model
The traditional nighthawk model delivers a preliminary read overnight. A remote radiologist issues a wet read for the emergency physician, and your local group performs the official interpretation the next morning. Every overnight study is read twice, your radiologists start each day with an overread queue, and any discrepancy between the prelim and the final creates a callback problem hours after the patient may have been discharged.
AstraRad delivers final signed reports overnight. The subspecialist who reads your 3 a.m. head CT signs the report of record. There is no morning re-read, no double work, and no prelim-to-final discrepancy window. For a detailed breakdown of why this distinction matters clinically and financially, see our guide to STAT vs preliminary vs final reads.
| Traditional nighthawk (prelim model) | AstraRad (final-read model) | |
|---|---|---|
| Overnight report | Preliminary wet read | Final signed report |
| Morning workload | Full overread of every overnight study | None |
| Discrepancy exposure | Prelim-to-final gap, callbacks after discharge | Closed at signature, under 0.3% major discrepancy rate |
| Reader | Often a generalist pool | Fellowship-trained subspecialist matched to the study |
| Billing | Local group bills the final read | Final read complete, ready for billing workflow |
Quality is verified, not assumed. One in every 20 AstraRad reports is independently double-read, and our major discrepancy rate runs under 0.3%.
Overnight STAT performance: 28-minute median, 99.4% SLA compliance
Night coverage is only as good as its worst hour. AstraRad's SLA tiers apply identically at 2 p.m. and 2 a.m.:
| Priority | SLA commitment | Typical use |
|---|---|---|
| STAT | Under 1 hour | ED, stroke, trauma, acute abdomen |
| Urgent | Under 4 hours | Inpatient and urgent outpatient |
| Routine | Under 24 hours | Scheduled outpatient volume |
Median STAT turnaround is 28 minutes, and SLA compliance is 99.4% over the trailing 12 months. We hit those numbers overnight because our 240 subspecialists work across 12 time zones. The radiologist reading your midnight CT angiogram is in the middle of a normal shift, not fighting fatigue at the end of a call night. That is the structural advantage of a distributed network over a local group stretching to cover nights, and it is why STAT reads under 30 minutes are our median performance rather than a marketing ceiling.
How do ED, stroke, and trauma workflows run after hours?
Emergency imaging is where nighthawk coverage earns its keep, and it is where subspecialty matching matters most.
Stroke. A suspected stroke at 1 a.m. needs a non-contrast head CT read in minutes, often followed by CT angiography and perfusion. AstraRad routes these to neuroradiology-trained readers under the STAT tier. See our STAT CT reads service page for the full CT workflow, including single, double abdomen and pelvis, special, and coronary CTA protocols.
Trauma. Multi-region trauma CTs go to ER and body imaging subspecialists who read pan-scans routinely. A final signed report means the trauma surgeon and the admitting team work from the same document, with no prelim caveats.
Pediatric emergencies. A generalist prelim on a pediatric abdomen at 4 a.m. is exactly the situation the prelim model handles worst. AstraRad routes pediatric studies to pediatric-trained subspecialists at any hour.
Across all of it, study types span the full emergency and routine mix: CR X-ray, CT, MRI including advanced and cardiac protocols, ultrasound, mammography, nuclear medicine gamma, and PET-CT.
Which coverage model fits your facility?
Nighthawk coverage is not one-size-fits-all, and because AstraRad prices per report with no minimums, you are never buying block hours you do not use.
Full nights, every night. Your local radiologists read days; AstraRad reads everything from evening sign-out to morning sign-in. The most common model for community hospitals and imaging centers with ED contracts.
Partial nights. Your group covers evenings until 10 p.m. or midnight, and AstraRad takes the deep-night hours where volume is lowest but the staffing burden is highest.
Nights plus weekends and holidays. Many facilities combine overnight coverage with weekend and holiday coverage under one arrangement, one rate card, and one quality program.
Overflow and surge. Keep your own night coverage and route only what exceeds local capacity. With headroom for 25,000 additional studies per month, AstraRad absorbs surges without renegotiation, and an 8,000-study backlog clears in under 30 days if you are digging out from one.
Switching between models does not require a new contract cycle. Send one study a month or ten thousand; the per-report price is the same structure either way.
What does nighthawk coverage cost?
AstraRad does not publish a flat price list because after-hours pricing is a transparent multiplier printed directly on the rate card, applied to per-report base rates by study type. There are no minimums, no subscriptions, and no platform fees, so the cost of any coverage model is simple arithmetic you can do before you commit. Industry-typical per-read teleradiology pricing and how overnight premiums are usually structured are covered in our teleradiology cost guide.
To see exact numbers for your study mix, review our pricing approach and request a rate card. You will have it within one business day.
Getting started without an integration project
Most facilities begin sending overnight studies within days, not months. AstraRad accepts DICOM directly from your existing PACS or through secure portal upload, so there is no integration project standing between you and coverage. HL7 and FHIR delivery options push finalized reports back into your RIS or EHR when you want them there. The platform is HIPAA and GDPR compliant and DICOM conformant, and reads are performed by radiologists licensed in the state where your patients are located.
If your nights are being covered by prelims that your group re-reads every morning, you are paying for overnight coverage and still doing the overnight work. Contact us for a rate card and see what final-read nighthawk coverage costs for your actual volume.