210X is a United States Navy officer designator for a Medical Corps Officer.
Medical Corps Officers include:
Naval Flight Surgeons
Naval Surface Medical Officers
Naval Submarine Medical Officers
In the United States Navy, commissioned officers are either line officers or staff corps officers. Staff corps officers are specialists in career fields.
The 210X designator distinguishes differences in job experience categories, including: Administrative, Clinical, Operational, Education/Academic, Research.
A successful career includes assignment to positions from multiple tracks.