Built for NHS EPR migrations

Every patient record.
Migrated with confidence.

Chron ingests legacy EPR data, strips all patient identifiers before AI processing, and generates structured clinical summaries ready for your clinicians to review and approve.

Book a Demo See how it works ↓
app.chron.health/patients/CHR-CYEC-E
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📋
🔍
⚙️
CHR-CYEC-E Age: 85–89  ·  Male  ·  Source: Paris EPR Pending Review
AI Summary
Source Records

Narrative

85–89 year old male admitted with acute alcohol withdrawal. Treated with Pabrinex IV protocol per trust guideline. Discharged with alcohol liaison referral.

Primary Diagnosis

Delirium tremens / Wernicke's encephalopathy

Medications on Discharge

Thiamine 100mg TDS, Pabrinex course complete

EPR migrations lose patient history. Chron doesn't.

The cost of unstructured legacy data in NHS digital transformation

£20–50m
Average cost of an NHS
EPR migration programme
Months
of manual clinician effort
reviewing raw legacy records
1000s
of records lost or corrupted
at every go-live

When a trust migrates from RiO to Oracle Health, from Lorenzo to Epic — the patient data doesn't migrate cleanly. Clinicians inherit thousands of unstructured legacy records. Chron turns them into structured, approved summaries before go-live.

From legacy export to approved summary
in minutes.

Four steps. No NHS numbers visible after upload.

01

Upload Legacy CSV

Upload your EPR export. No NHS numbers visible at any point after upload. Data never leaves Azure UK South.

02

Map Columns in 30 Seconds

Chron auto-detects NHS Number, Name, and DOB fields. PII is stripped immediately — CHR tokens assigned before any AI sees the data.

03

AI Summarises Every Record

Claude receives only CHR token, age band, and redacted clinical text. Generates structured narrative, diagnoses, and medications — no patient identity involved.

04

Clinician Approves & Exports

Review queue with bulk approval for high-confidence summaries. Export to PDF, FHIR R4, or direct EPR import. Full audit trail included.

Patient identifiers
never reach the AI.

This is the question every NHS IG lead asks first. The answer is built into Chron's architecture — not bolted on as an afterthought.

  • ✓ NHS Number, name, and date of birth are stripped before any AI processing
  • ✓ All data processed and stored exclusively in Azure UK South
  • ✓ Token maps stored in Azure Key Vault — never in the application database
  • ✓ Source records purged automatically after summarisation is complete
📄 Legacy EPR Export
NHS Number: 943 476 5821
Name: Smith, James
DOB: 12/03/1938
▼
⚙ Pseudonymiser
NHS Number → CHR-CYEC-E
Name      → [REDACTED]
DOB       → Age band 85–89
▼
🔐 Azure Key Vault
Token maps only

Never in application
database
✦ Claude API
Receives only:
· CHR token
· Age band
· Redacted text
▼
✓ Patient Summary
Re-associated with identity
on export only · Full audit trail

Built for NHS procurement from day one.

Every compliance requirement NHS Digital Transformation teams encounter is addressed in Chron's design.

✓ DSP Toolkit

Mapped

All 10 data security assertions evidenced with supporting documentation.

✓ DCB0129

Clinical Safety Case Complete

Full hazard log and clinical risk assessment. Mandatory human review before any clinical use.

✓ Data Residency

Azure UK South Only

No data ever leaves UK sovereign territory. No US-based processing at any pipeline stage.

✓ GDPR / UK GDPR

DPIA Complete

Full Data Protection Impact Assessment. Data Processing Agreement template included for trusts.

✓ Caldicott Principles

Guardian Sign-off Flow Built In

Structured approval workflow designed with Caldicott Guardian accountability at each stage.

✓ G-Cloud Ready

Sub-threshold Pilot Pricing

Pilot procurement available below tender threshold. Full G-Cloud listing in progress.

Designed by NHS digital transformation specialists who have delivered EPR migrations at mental health trusts across the North West.
48/48
Pseudonymisation tests
passing in CI pipeline
Zero
Patient identifiers stored
in application database
Sub-threshold
Pilot pricing — procure
without full tender process

Pilot pricing that fits NHS procurement.

No commitment required for a demo. Sub-threshold pilot procurement available.

Pilot

Up to 10,000 patients

From £10,000
Sub-threshold · no tender required
  • ·Sub-threshold NHS procurement
  • ·Full pseudonymisation pipeline
  • ·PDF + FHIR R4 export
  • ·DSP Toolkit and DPIA documentation
  • ·3 months implementation support
Start a Pilot

Full Migration

Unlimited patients

Bespoke
Framework contract · scoped to your programme
  • ·Framework contract procurement
  • ·Dedicated implementation support
  • ·On-premise deployment option
  • ·SLA with response time commitments
  • ·Named clinical safety officer
Talk to us →

Ready to see Chron in action?

Book a 30-minute demo. We'll show you a live ingestion of a legacy EPR export — pseudonymisation, AI summarisation, clinical review, and export — end to end.

Get in Touch →

Or email us at hello@chron.health