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AOE Codes

Since 11/18/2011, Ask at Order Entry (AOE) codes have been included in both PDF and Excel versions of the test setup, which can be found in the call-out box on the right-hand side of the test catalog.

Setup Information

Some tests, such as microbiology cultures and those that determine heavy metal ion concentration, require additional information with the laboratory order. This information, in the form of Ask at Order Entry (AOE) codes, can be transmitted through the MayoACCESS Batch Processing screen or an established HL7 interface. Examples of this information include specimen source, collection duration, and patient demographic information.

Most Laboratory Information Systems (LIS) generate and transmit correct HL7 messages as NTE comments or in specific OBX fields. The preferred method is OBX, which marks sendout tests as “ready” for batching on the MayoACCESS Batch Processing screen. To transmit AOE Codes using OBX, the question code must be located in OBX-3 and the answer code must be located in OBX-5. For example:

Ordered Test
Cortisol, Free, Urine, TEST ID: CORTU

OBX Transmission
OBX|1|ST|TM93^Collection Duration|01|24
OBX|2|ST|VL47^Urine Volume|01|1600

AOE questions listed as reportable in the test setup will be returned in the HL7 laboratory result using the same code. In this case, TM93 and VL47 question codes are also used as result codes to return the laboratory result. These should also be built in the LIS test dictionary.

Comparison of Old and New AOE Codes for Cortisol, Free, Urine
OLD - Prior 11/18/2011
NEW - After 11/18/2011
Order Code 8546 CORTU
Question Codes 755, 756 TM93, VL47
Question #1 Collection Duration (755) Collection Duration (TM93)
Question #2 Urine Volume (756) Urine Volume (VL47)
Reportable (Result Code Returned?) Yes Yes
Result Codes 755, 756 TM93, VL47

Several culture-based microbiology tests also must be rebuilt with the new codes because of a change in the number of results returned. These tests typically have a “Q” prefix for the AOE question code.

Comparison of Old and New AOE Codes for Bacterial Culture, Aerobic, Respiratory
OLD - Prior 11/18/2011
NEW - After 11/18/2011
Order Code 50003 SPUT
Question Codes 50039 Q00M0055
Question #1 Specimen Source Specimen Source
Reportable (Result Code Returned?) Yes No
Result Code 50039 None