About John W. Marshall
John Walter Marshall is an addiction / substance abuse counselor. Mr. John W. Marshall has 4 years of experience in addiction / substance abuse counseling.
Licenses
John W. Marshall has been registered with the National Provider Identifier database since December 20, 2021, and his NPI number is 1285394114. Mr. Marshall certified his NPI information on 01/15/2023.
Book an Appointment
To schedule an appointment with Mr. John W. Marshall, please call (619) 515-2300.