The work I know of, I'm not in USA only have an interest in copyright laws in general, is Feist v Rural Telephone (1991) -- which appears to mirror codes for health procedures quite closely; but not exactly.
There's old but more recent law from Practice Management v AMA (1997) supporting that AMA's codes can't be copyrightable as they're part of legislation.
Berne's Art 2(8), to which USA are signed, related to non-copyright of facts.
I'm afraid I'm not appraised of the full situation, however.
There's old but more recent law from Practice Management v AMA (1997) supporting that AMA's codes can't be copyrightable as they're part of legislation.
Berne's Art 2(8), to which USA are signed, related to non-copyright of facts.
I'm afraid I'm not appraised of the full situation, however.