We have found valid versions of the PHQ-9M (PHQ-9 modified for adolescents) mislabeled "PHQ-A" on the internet and in the community. Years ago, the original PHQ-A contained 80+ questions and assessed for depression, anxiety, substance abuse, eating disorders, etc.; it is no longer available today.
A valid version of the PHQ-9M (9 questions) mislabeled "PHQ-A" is acceptable to use for both adolescent screening and depression care measures. The original 80+ question version is not acceptable.
FYI, the PHQ-9M approved by the PHQ-9 developer can be accessed within the Guidelines for Adolescent Depression in Primary Care (GLAD-PC) toolkit:
This category is for questions related to the Depression Care measure suite.