# Health Level Seven (HL7) Standard for electronic data exchange — file signature 4D 53 48 7C 42 53 48 7C at offset 0 For Health Level Seven (HL7) Standard for electronic data exchange, hex signature is 4D 53 48 7C 42 53 48 7C; offset is 0; extension is hl7, verified against its source on 2026-09-22. - **Hex signature:** 4D 53 48 7C 42 53 48 7C _(verified: appears in the quote below)_ - **Offset:** 0 _(verified: appears in the quote below)_ - **Extension:** hl7 _(verified: appears in the quote below)_ - **Format:** Health Level Seven (HL7) Standard for electronic data exchange _(verified: appears in the quote below)_ ## What the source says > 4D 53 48 7C 42 53 48 7C | MSH | BSH | | 0 | hl7 | Health Level Seven (HL7) Standard for electronic data exchange | ## Source - https://en.wikipedia.org/wiki/List_of_file_signatures Last verified: 2026-09-22. Review by: 2027-09-22. Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).