Polaris 3900 Sport/P39 Owner's Manual page 1163

Example Forms/Labels
Sex
The patient's sex:
(M) – Male
(F) – Female
(I) – Indeterminate
P
The practice partnership code, initials and surname of the senior GP.
For single-handed practices.
S/H
GP details, surname and initials plus the GP code.
GP:
The patient's GP and GP code.
C-12
Appendix C
Registration Reference Manual
Version: 2.13