Oberstabsarzt

Oberstabsarzt (short: OStArz or OSA) is a military rank in German speaking armed force. It describes a medical staff officer surgeon or medical staff officer dentis comparable to major (de: Major) or lieutenant commander (de: Korvettenkapitän) NATO-Rangcode OF3 in anglophone armed forces.

Bundeswehr
In the Joint Medical Service of the German Bundeswehr Oberstabsarzt, Oberstabsapotheker, and Oberstabsveterinär comparable in NATO to the OF-3 ranks Major, and to Korvettenkapitän.

Address
The manner of formal addressing of military surgeons/dentists with the rank Oberstabsarzt is "Herr/Frau Oberstabsarzt", with the rank Oberstabsapotheker, "Herr/Frau Oberstabsapotheker", and veterinaries with the rank Oberstabsveterinär "Herr/Frau Oberstabsveterinär".

Rank insignias
On the shoulder straps (Heer, Luftwaffe) there is one silver star 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 Marines, 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.

Wehrmacht
In the German Wehrmacht from 1933 until 1945 there were the OF3-ranks Oberstadsarzt, Oberstabsapotheker, and Oberstasveterinär, comparable to the Major OF3-rank as well.

During wartime, regular assignments of Oberstadsarzt were commander of a medical company, or chief of a, field-, evacuation-, or war hospital (de. Feldlazarett / Krieslazarett). However, a field hospital could be managed by an Oberfeldarzt (OF4) as well. An Oberstadsarzt was assisted by first lieutenants (Dr.), second lieutenants (Dr.), and help surgeons (de: Ober-, Assistenz-, and Hilfsärzte).

The corps colour of the military Health Service Support (HSS) in German armed forces was traditional dark blue, and of the veterinarian service carmine red. This tradition was continued by the medical service corps in Heer and Luftwaffe of the Reichswehr and Wehrmacht. However, the corps colour of the Waffen-SS HSS was “cornflower blue”.

Austria-Hungary
In the Austria-Hungarian Common Army (de: Gemeinsame Armee or k.u.k. Armee) there was the OF3-rank Stabsarzt (en: Staff surgeon) until 1918, equivalent to the OF3-rank Oberstabsarzt in Germany. That particular rank was comparable to the Major OF3-rank as well.