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

Mrs. Gwendolyn Marcella Blacknall, LGADC

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1275171217

Mrs. Gwendolyn Marcella Blacknall, LGADC is an Addiction (Substance Use Disorder) Counselor in Prince Frederick, Maryland. Licensed in Maryland. Registered with an NPI since 2019.

Licensed in
MD
In the registry since
2019

Practice location Address checks out

65 Duke St Ste 203
Prince Frederick, MD 20678-6128
Phone: (443) 824-4818
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 LGA2466 (MD)

Record details

NPI number1275171217
Entity typeIndividual (Type 1)
GenderFemale
Credentials LGADC
Sole proprietorNo
NPI enumeratedDecember 19, 2019
Last updated in NPPESDecember 19, 2019
Certification dateDecember 19, 2019

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