Well, I found my answer but hopefully this will help someone else out in the future.
5. THE CURRENT, UNCHANGED, MRC REASON CODES ARE THE FOLLOWING:
A. DA - DNA NOT ON FILE
B. HR - HEARING READINESS NOT CURRENT
C. HT - HIV NOT CURRENT
D. IM - IMMUNIZATIONS NOT CURRENT
E. VR - VISION READINESS NOT CURRENT
F. DR - DENTAL CLASS
G. PG - PREGNANCY
H. HA - PHYSICAL HEALTH ASSESSMENT NOT CURRENT
6. THE NEW MRC REASON CODES ARE THE FOLLOWING:
A.
IE - DEFICIENT INDIVIDUAL MEDICAL EQUIPMENT
B. DS - PAST DUE DENTAL SCREENING
C. TP - TEMPORARY PROFILE
D. PP - PERMANENT PROFILE
E. MR - REFERRED TO OR IN MAR2
F. RP - REFERRED TO MEB/PEB
G. PC - PERMANENT MEDICAL CONDITION
7. MRC REASON CODES REMOVED ARE THE FOLLOWING:
A. MT - MEDICAL WARNING TAGS
B. MN - MEDICAL NON-DEPLOYABLE PROFILE
C. LC - DEPLOYMENT LIMITING CONDITION
D. PS - PAP
SMEAR NOT CURRENT
E. RB - PHYSCAT X WAITING RETENTION BOARD