Army · MOS history

91B5 Medical Specialist

The Army’s conversion listing identifies two successors to 91B5, Medical Specialist: 91W, Health Care Specialist, and 91Z, Chief Medical NCO.

Codes named in this history

Listed in today's directory

These codes have directory pages; their current use has not been reviewed, so no current claim is made here.

Historical steps

The source names a code the branch later retired, or whose reviewed record is historical. Its story continues on that code's own page.

Documented history

Medical Specialist

The listed conversion took effect on 1 October 2001. The reference’s 2025 publication year is not the conversion date.

  • The listing does not state the conditions for conversion to 91W rather than 91Z.
Source extraction notes

DA Pam 611-21 Table 10-4 maps predecessor MOSC 91B5 to 91W, 91Z; source successor entries: 91W HEALTH CARE SPECIALIST; 91Z CHIEF MEDICAL NCO; conversion effective 01 Oct 2001.

Source documents (1)

Reviewed September 23, 2026 against references 1 and 2.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.