Redact medical record numbers from text, JSON, and CSV
An MRN is the join key for a patient's entire history inside a provider. Redacting it is often the difference between a de-identified extract and a fully identifiable one.
How Redactly detects medical record numbers
- Detected by a context cue that pairs an MRN or record-number label with the value.
- No format assumption, because MRN schemes are provider-specific.
- Health plan identifiers are reported separately as healthcare.health_plan_id.
Why redact medical record numbers?
Under HIPAA the MRN is one of the 18 identifiers that must be removed for safe-harbour de-identification.
Example request
curl -X POST https://api.bitbanger.in/v1/redact \
-H "X-API-Key: rdct_your_key_here" \
-H "Content-Type: application/json" \
-d '{"text": "MRN: 004512378, referred to cardiology on 2026-09-30.", "style": "replace"}'Every hit in the response carries entity, text, start, and end. The offsets index into the text you sent, so you can apply the redactions to your own copy of the document. The full response schema is in the API reference.
Questions
Does Redactly redact medical record numbers automatically?
Yes. Send text to the API and every detected type is redacted, including medical record numbers. To redact only this type, pass the value healthcare.medical_record in the entities filter. No training or configuration is required.
What happens to medical record numbers after redaction?
With style set to replace, each match becomes [healthcare.medical_record] — the entity type in square brackets. Setting style to mask replaces every character with a block character, and remove deletes the span entirely.
Related entity types
- Health plan identifiersRedact health plan and insurance member IDs from claims, eligibility files, and billing exports.
- Medical conditionsRedact diagnoses and medical conditions from clinical notes, claim narratives, and support transcripts.
- MedicationsRedact drug names and prescriptions from clinical text and support transcripts.
Redact medical record numbers in production
Get an API key and send your first request in a minute. Plans start at $24/month.
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