October 1, 1973 The American Psychological Association (APA) Board of Professional Affairs formally voted to recommend that APA request the American Board of Professional Psychology (ABPP) to establish a National Register of Health Service Providers in Psychology.

November 30, 1973 The APA Board of Directors "voted to request the Board of Directors of the American Board of Professional Psychology (ABPP) to establish a National Registry Council as outlined in the recommendations of the ad hoc Coordinating Committee for the National Registry of Health Service Providers in Psychology…."

March 1, 1974 ABPP Board of Trustees voted to implement the project.

June 1, 1974 Initial meeting of the twelve-member Council for the National Register of Health Service Providers in Psychology; "Health Service Provider in Psychology" defined; Criteria for credentialing established.

June 28, 1974 APA Board of Directors "was informed of the progress of the American Board of Professional Psychology (ABPP) in establishing the Council for the National Register of Health Service Providers in Psychology. It expressed its appreciation to ABPP for undertaking this important task and urged all eligible psychologists to support this endeavor."

September 1, 1974 Joint letter from APA President Bandura and National Register Chairman Zimet sent to all psychologists soliciting applications to the National Register.

December 20, 1974 Incorporation of the Council for the National Register of Health Service Providers in Psychology in the District of Columbia as a 501(c)(3) (charitable, educational) organization.

August 1, 1975 First edition of the National Register published listing 6,877 credentialed Health Service Providers in Psychology.