AI-powered NHS EPR migration

Every patient record.
Migrated with confidence.

AI reads every legacy record. Clinicians approve in seconds.

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.

app.chron.health/patients/CHR-CYEC-E
CHR-CYEC-E Age: 85–89  ·  Male  ·  Source: Paris EPR Pending Review
AI Summary
Source Records

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

Delirium tremens / Wernicke's encephalopathy

Thiamine 100mg TDS, Pabrinex course complete

AI-generated summary — clinician-approved before migration

EPR migrations lose patient history. Chron doesn't.

Chron uses AI to solve the legacy data problem at the heart of every EPR migration.

£100,000s
spent on every NHS
EPR migration programme
Months
of clinical and programme time
spent on legacy data migration
1000s
of records lost or corrupted
at every go-live

When a trust migrates from Paris to RiO, from Lorenzo to Nervecentre — 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
02
03
04
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.

Core Capabilities

Built for the hardest part of every EPR migration.

Legacy records are messy, duplicated, and unstructured. Chron turns them into clean, clinician-approved summaries — safely.

AI-Generated Clinical Summaries

Claude reads every legacy record and generates a structured clinical narrative — diagnoses, medications, and care history — ready for clinician review in seconds.

Automatic Duplicate Detection

Chron's matching engine identifies probable duplicate patient records before migration, flagging them for clinician review. Prevent duplicate histories arriving in your new EPR at go-live.

Patient Identifiers Never Leave Your Environment

NHS Number, name, and date of birth are stripped and pseudonymised before any AI processing. Claude sees only a token, an age band, and redacted clinical text.

Human Review at Every Step

No summary reaches your new EPR without a clinician approving it. Bulk approval for high-confidence summaries, individual review for flagged or complex records. Full audit trail throughout.

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

In Progress

Architecture designed to meet DSP Toolkit requirements. Assessment in progress ahead of first trust onboarding.

DCB0129

In Scope

DCB0129 clinical safety process initiated. Hazard log and Clinical Safety Case to be completed with first trust partner.

Data Residency

Azure UK South Only

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

GDPR / UK GDPR

Template Ready

DPIA template prepared for trust review. Full assessment completed jointly with each trust's IG team prior to go-live.

Caldicott Principles

Workflow 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 NHS trusts across England.
48/48
Pseudonymisation tests
passing in CI pipeline
Zero
Patient identifiers stored
in application database
Under £50k
Procurement threshold —
no formal tender required

Pricing that fits NHS procurement.

Scoped to your trust. No commitment required for a demo.

Pilot & Migration Pricing

Under £50k
procurement threshold

No formal tender required


Every deployment is scoped to your trust's volume, timeline, and requirements. We'll provide a fixed-price proposal after an initial call.

Get in touch →

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 help@chronhealthai.co.uk