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Asked: 2026-05-24T23:53:01+00:00

I need to store Medicare APC codes. I believe the format requires 4 numbers.

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I need to store Medicare APC codes. I believe the format requires 4 numbers. Leading zeros are relevant. Is there any way to store this data type with verification? How should I store this data (varchar(4), int)?

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  1. Editorial Team
    varchar(4)

    optionally, you can still add a check constraint to ensure the data is numeric with leading zeros. This example will throw exceptions in Oracle. In other RDBMS, you could use regular expression checks:

    alter table X add constraint C 
check (cast(APC_CODE as int) = cast(APC_CODE as int))
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