On 1 August 1929, Hocheisen joined the
Nazi Party (membership number 145,058). On 1 July 1930, he became a member of its
paramilitary unit, the
Sturmabteilung (SA), with the rank of SA-
Sanitäts-Oberführer and was assigned to the staff of the
Supreme SA Leader. He was given the title of
Reichsarzt der SA (SA Reich Physician) with the rank of SA-
Sanitäts-Gruppenführer from 1 August of that year, and made leader of the Department of Medical Services in the quartermaster's office of the Supreme SA Leadership (OSAF). He was charged with organizing a health and medical service within the SA. The SA medical corps employed physicians, nurses, pharmacists and dentists. These services were necessitated by the fact that in the years before the Nazis came to power, SA meetings, rallies and street demonstrations often were accompanied by outbreaks of violence, resulting in many casualties. In November 1932, Hocheisen had his position upgraded to chief of the Medical Office of the SA. On 20 April 1933, he was promoted to SA-
Sanitäts-Obergruppenführer. In May 1933, Hocheisen was appointed the representative of the Reich Minister of the Interior,
Wilhelm Frick, to the Office of the Commissioner for Volunteer Nursing. Also that year, he was made the Interior Minister's special representative for the regulation of Red Cross issues. On 1 November 1933, he was succeeded by
Emil Ketterer as head of the SA Medical Office. At the same time, he was named to the newly-created post of Inspector General of SA and
SS Medical Services. In addition to his medical duties with the SA, Hocheisen also pursued a political career. In the
July 1932 German parliamentary election, he was elected a
Reichstag deputy for electoral constituency 28 (
Dresden–Bautzen), and he subsequently served without interruption until his death in December 1944. From March 1933, he represented constituency 29 (
Leipzig) and, from March 1936, constituency 15 (
East Hanover). == Army and SA ranks ==