Since the Medical Library Association (MLA) adopted the Code for the T
raining and Certification of Medical Librarians in 1949, MLA members h
ave reviewed and revised the program regularly. This paper traces the
history of MLA's professional recognition program to illustrate how th
e program has changed over time and to identify the issues that have s
urrounded it. These issues include the value of the program to individ
ual members, cost to MLA, appropriate entry requirements certification
examinations, and recertification requirements. The development and o
peration of MLA's current credentialing program, the Academy of Health
Information Professionals, is described in detail.