P | Preferred | A | A | | This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment. | This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment. | This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment. | This specimen is Preferred for all attributes (Container and Additive) identified in the OM4 segment. | |
A | Alternate | A | A | | This is a specimen that is acceptable as a replacement for a preferred specimen. In the following field (OM4-17), the sequence number of the preferred specimen must be messaged. | This is a specimen that is acceptable as a replacement for a preferred specimen. In the following field (OM4-17), the sequence number of the preferred specimen must be messaged. | This is a specimen that is acceptable as a replacement for a preferred specimen. In the following field (OM4-17), the sequence number of the preferred specimen must be messaged. | This is a specimen that is acceptable as a replacement for a preferred specimen. In the following field (OM4-17), the sequence number of the preferred specimen must be messaged. | |