Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John Joseph McClanahan, PHD, CCDC, LCADC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1720139934

Dr. John Joseph McClanahan, PHD, CCDC, LCADC is an Addiction (Substance Use Disorder) Counselor in Arnold, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2007
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

1454 Baltimore Annapolis Blvd
Arnold, MD 21012-2455
Phone: (410) 626-7550
Fax: (410) 626-8805
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence LCA040 (MD)

Record details

NPI number1720139934
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD , CCDC , LCADC
Sole proprietorYes
NPI enumeratedJanuary 15, 2007
Last updated in NPPESJuly 8, 2007

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