Letter details
Identity fields should be copied from the passport, not reconstructed from reports
Medical records may use shortened names, different name order, married names, or transliteration. The visa-support letter should follow the passport identity and separately explain any legitimate variation that could otherwise create doubt.
Send a clear passport bio page through an approved channel and verify every character before application.
Use the exact hospital branch and city expected to review or treat the patient.
Ask for correction rather than editing a hospital-issued document yourself.