, ▁resp ir atory ) ▁V eter in arian ▁ ▁The ▁Health ▁Services ▁Officer ▁( H SO ) ▁category ▁compr ises ▁over ▁ 5 0 ▁al lied ▁health ▁special ties , ▁including ▁audi ology , ▁social ▁workers , ▁phys ician ▁assist ants , ▁opt omet rist s , ▁statist icians , ▁computer ▁scient ists , ▁dent al ▁h yg ien ists , ▁medical ▁records ▁administr ators , ▁medical ▁techn olog ists ▁and ▁others . ▁ ▁The ▁commission ed ▁corps ▁uses ▁the ▁same ▁commission ed ▁officer ▁rank ▁structure ▁as ▁the ▁United ▁States ▁Navy ▁and ▁Coast ▁Guard : ▁from ▁en sign ▁to ▁adm iral ▁( O - 1 ▁through ▁O - 1 0 ). ▁ ▁Commission ed ▁Corps ▁officers ▁are ▁typically ▁appointed ▁via ▁direct ▁commission , ▁and ▁receive ▁the ▁same ▁pay ▁and ▁benefits ▁as ▁other ▁members ▁of ▁the ▁uniform ed ▁services . ▁They ▁cannot ▁hold ▁a ▁dual ▁commission ▁with ▁another ▁uniform ed ▁service ▁but ▁inter - service ▁trans fers ▁are ▁permitted . ▁ ▁The ▁commission ed ▁corps ▁may ▁be ▁militar ized ▁by ▁the ▁President . ▁ 4 2 ▁US C ▁ 2 1 7 ▁states : ▁In ▁time ▁of ▁war , ▁or ▁of ▁emer gency ▁involving ▁the ▁national ▁defense ▁proc laimed ▁by ▁the ▁President , ▁he ▁may ▁by ▁Executive ▁order ▁declare ▁the ▁commission ed ▁corps ▁of ▁the ▁Service ▁to ▁be ▁a ▁military ▁service . ▁Upon ▁such ▁declaration , ▁and ▁during ▁the ▁period ▁of ▁such ▁war ▁or ▁such ▁emer gency ▁or ▁such ▁part ▁there of ▁as ▁the ▁President ▁shall ▁pres cribe , ▁the ▁commission ed ▁corps