Oberfeldarzt (short: OFArzt or OFA) is a military rank in German speaking armed forces. It denotes a medical staff officer surgeon or medical staff officer dentist and is comparable in rank to lieutenant colonel (de: Oberstleutnant) or (naval) commander (de: Fregattenkapitän) NATO-Rangcode OF4 in anglophone armed forces. In the Joint Medical Service of the German Bundeswehr Oberfeldarzt, Oberfeldapotheker, and Oberfeldveterinär are comparable in NATO to the OF-4 rank Oberstleutnant; Flottillenenarzt, and Flottillenapotheker are equivalent in to the rank Fregattenkapitän, OF-4 as well. The manner of formal addressing of military surgeons/dentists with the rank Oberfeldarzt is "Herr/Frau Oberfeldarzt"; with the rank Oberfeldapotheker, "Herr/Frau Oberfeldapotheker". A Flottillenenarzt will be addressed "Herr/Frau Flottillenarzt"; and the Flottillenapotheker, "Herr/Frau Flottillenapotheker". On the shoulder straps (Heer, Luftwaffe) there are two silver stars in silver oak leaves and the career insignia (de: Laufbahnabzeichen) as symbol of the medical standing, or course of studies. The piping on shoulder straps shows the Waffenfarbe (en: corps- or troop-function colour), corresponding to the appropriate military service, branch, or special force. The corps colour of the "Bundeswehr Joint Medical Service" is dark blue. In the Navy, the career insignia is in the middle of both sleeves, 3 cm above the cuff strips, and on the shoulder straps between strips and button. Oberfeldarzt of the German Wehrmacht was comparable to the Oberstleutnant / Fregattenkapitän (OF-4), as well as to the Obersturmbannführer and Oberstleutnant of the Waffen-SS. In line to the so-called Reichsbesoldungsordnung (en: Reich's salary order), appendixes to the Salary law of the German Empire (de: Besoldungsgesetz des Deutschen Reiches) of 1927 (changes 1937 – 1940), the comparative ranks were as follows: C 5 Oberstleutnant (Heer and Luftwaffe) Fregattenkapitän (Kriegsmarine) Oberfeldarzt (medical service of the Wehrmacht) Geschwaderarzt, introduced June 26, 1935 (medical service of the Kriegsmarine) Oberfeldveterinär from 1934 (veterinarian service of the Wehrmacht) During wartime, regular assignments of Oberfeldarzt was chief of a, field-, evacuation-, or war hospital (de.