🇺🇸 Americas · Backend AI & clinical services

Overnight preliminary reads for US radiology, from India’s largest reporting network

The nighthawk model is more than twenty years old and was pioneered from Bangalore. 5C runs it at modern scale: preliminary overnight reads, AI-driven workflow and QC — with final interpretation, signature and billing always by your US radiologist.

What does 5C Network offer in United States?: 5C provides US hospitals, imaging centers and radiology groups with human-in-the-loop overnight support: every study receives a preliminary interpretation by an NMC-registered radiologist, with AI-assisted workflow orchestration and an automated QC pipeline underneath — your team never receives raw AI output. Every study returns to your US-licensed radiologist, who performs the final interpretation, signs the report and bills for it. 5C never issues the final report for US patients.
Who signs the final report?: The signing radiologist holds a state medical licence — per ACR policy, in both the state where the exam is performed and the state where it is interpreted — alongside hospital credentialing and, as the de facto US standard, ABR board certification. Medico-legal responsibility for the final report rests with that US physician; that is the design of the model, not a caveat to it.

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How the backend model works

Offshore preliminary reads with final interpretation by a US radiologist — the nighthawk model — have been established US industry practice for over twenty years, and the model was pioneered from Bangalore. Medicare regulation 42 CFR 411.9 excludes payment for physician services furnished outside the United States, which is precisely why the model is structured this way: the offshore read is a preliminary, non-billed work product, and the billable final interpretation is rendered by the US physician. 5C operates strictly within that structure.

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Your facility connects to 5C over a secure DICOM/PACS integration — typically live within 72 hours — with a HIPAA Business Associate Agreement executed before any PHI moves.
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Overnight and overflow studies route to 5C, where AI-driven triage and worklist orchestration prioritize urgent cases and flag studies for QC attention.
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An NMC-registered radiologist reads every study and produces a structured preliminary interpretation during India’s working day — your team never receives raw AI output — and each read passes through 5C’s automated QC pipeline before release.
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Preliminary reads land on your US radiologist’s worklist by morning, with the full study context and a complete audit trail.
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Your US-licensed, credentialed radiologist performs the final interpretation, signs the report and bills for the service — exactly as 42 CFR 411.9 requires.

Two experts behind every study — and honest regulatory status

Bionic, 5C's clinical AI engine, is approved for clinical use in India. Outside India it operates as workflow and quality infrastructure, not as a cleared medical device. What travels with every study instead is human expertise: an NMC-registered Indian specialist reads each case as structured decision support, so the clinician who signs in United States starts from an expert-reviewed draft — human-in-the-loop support for every radiologist, on every study.

Radiology capacity in United States

The ACR projects a shortage of up to 42,000 radiologists in the US by 2033, and its job board currently lists over 1,800 open positions; Neiman HPI analysis published in JACR projects radiologist supply lagging imaging demand through 2055. Night and weekend coverage is where that gap bites first.

The India time-zone advantage

The US night is India’s working day: 10 pm Eastern is roughly 8 am IST. Overnight studies receive preliminary reads during India’s daytime and are waiting on your US radiologist’s worklist by morning — no local night shift required.

Data protection & compliance

HIPAA permits protected health information to be processed offshore, and 5C acts as a Business Associate under a signed Business Associate Agreement executed for each engagement — we name the instrument rather than claiming blanket compliance. Note that some state Medicaid programs and individual payer contracts add their own offshoring or data-localization restrictions — where those apply, 5C can deploy with US-resident data hosting, and contracting scope is reviewed against your payer mix before go-live. 5C’s information security program is certified to ISO 27001 and ISO 27701.

ISO 27001, 27701, 13485 and 9001 certified — security, privacy and quality management audited to international standards.

20M+ studies reported and 15,000+ studies handled per day across 2,000+ hospitals and diagnostic centres in India.

Around 400 NMC-registered radiologists on the network, giving genuine subspecialty depth for overnight preliminary coverage.

Automated QC pipeline runs on every study — not a sampled fraction — before any preliminary read is released.

Full audit trail on every study, supporting your credentialing, peer-review and payer documentation requirements.

DICOM/PACS integration in about 72 hours, so a pilot can start on real workflow quickly.

Frequently asked questions

Is it legal for a US hospital to use radiologists in India?

Yes, within a well-defined structure that has been established US industry practice for over twenty years: the offshore radiologist provides a preliminary interpretation, and a US-licensed radiologist performs the final interpretation, signs the report and bills for it. Medicare regulation 42 CFR 411.9 excludes payment for physician services furnished outside the United States, which is why the offshore read is a non-billed preliminary work product rather than a final report. 5C operates only within this model and never issues final reports for US patients.

Do we need a Business Associate Agreement with 5C?

Yes. HIPAA permits protected health information to be processed offshore provided the covered entity has a Business Associate Agreement in place, and 5C signs a BAA for every US engagement before any PHI is transmitted. One additional check belongs in diligence: some state Medicaid programs and individual payer contracts impose their own offshoring or data-localization restrictions. Where those terms apply, 5C can deploy with US-resident data hosting, and contracting scope is reviewed against your specific payer mix rather than asserted as blanket coverage.

Who is liable for the final report?

Your US radiologist — and that is the design of the model, not a loophole. The physician who renders the final interpretation holds the state medical licence (per ACR policy, in both the state where the exam is performed and where it is interpreted), the hospital credentialing, and typically ABR board certification, and carries the medico-legal responsibility that goes with signing. 5C’s preliminary reads, AI-assisted workflow and QC pipeline are inputs to that physician’s judgment, never a substitute for it.

Can the offshore preliminary read be billed to Medicare?

No, and 5C does not attempt to. Under 42 CFR 411.9, Medicare excludes payment for services furnished outside the United States, so the preliminary read from India is a non-billed operational input. The billable professional service is the final interpretation rendered by your US-licensed radiologist. This separation is what has made the nighthawk model durable for two decades: the economics and the regulation point in the same direction.

Is 5C’s AI FDA-cleared?

No, and 5C does not present it that way. Bionic, 5C’s AI platform, is regulator-approved for clinical use in India, where it operates across 2,000+ hospitals and diagnostic centres. In the United States it functions as workflow and quality infrastructure — triage prioritization, worklist orchestration and automated QC — not as a cleared diagnostic device. Every preliminary interpretation is produced by an NMC-registered radiologist, your team never receives raw AI output, and all clinical decisions rest with your US-licensed radiologist, who renders and signs the final interpretation.

Also serving

🇬🇧 Europe

United Kingdom

The NHS spent £241m on outsourced reporting in 2025, per the RCR. 5C takes a different position in the stack: human-in-the-loop support for every radiologist — AI-assisted workflow, expert-reviewed draft output and QC infrastructure that make each GMC-registered radiologist faster, not a substitute reporting service.

🇦🇪 Middle East

United Arab Emirates

The DHA telehealth standards expressly allow a UAE-licensed physician to consult an expert physician licensed in another jurisdiction. 5C builds on exactly that footing: AI-driven workflow and expert-reviewed preliminary reads that support your DHA, DoH or MOHAP-licensed radiologist — who issues every final report.

🇸🇬 Asia-Pacific

Singapore

Singapore is the rare market where the regulator has put the model in writing: MOH’s HCSA FAQ on radiological services confirms reporting can be outsourced to qualified persons, with the licensee remaining responsible. Bengaluru-based teleradiology has served Singapore since 2005 — 5C runs the modern version.

Sources

Every regulatory and workforce claim on this page traces to a primary or peer-reviewed source.

Bring 5C's AI and clinical backend to your imaging operation in United States

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