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

Mary-Eileen Hahn, MS

Individual provider Counselor · NPI 1669780458

Mary-Eileen Hahn, MS is a Counselor in Frederick, Maryland. Licensed in Maryland. Registered with an NPI since 2010.

Licensed in
MD
In the registry since
2010
Specialties on file
3
What do these letters mean?
MS — Master of Science
A graduate science degree.

See every abbreviation used in this directory →

Practice location Address checks out

10 N Jefferson St Ste 403
Frederick, MD 21701-3500
Phone: (301) 620-8700
Fax: (301) 620-8710
Show map & directions

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

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence LC3554 (MD)
Counselor Taxonomy 101Y00000X · Licence LC3554 (MD)
Mental Health Counselor Taxonomy 101YM0800X · Licence LC3554 (MD)

Record details

NPI number1669780458
Entity typeIndividual (Type 1)
GenderFemale
Credentials MS
Sole proprietorNo
NPI enumeratedSeptember 15, 2010
Last updated in NPPESSeptember 15, 2010
Mailing address10 N Jefferson St, Suite 403, Frederick, MD 21701-3500

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