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

Mary Lou Lyon, LCPC, LLC

Organization Professional Counselor · NPI 1811310238

Mary Lou Lyon, LCPC, LLC provides Professional Counselor services in Rockville, Maryland. Licensed in Maryland. Registered with an NPI since 2014.

Licensed in
MD
In the registry since
2014
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

966 Hungerford Dr Ste 18B
Rockville, MD 20850-1714 Not confirmed with CMS for 12 years — call before visiting
Phone: (301) 762-4100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence LC1509 (MD)

Record details

NPI number1811310238
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mary Lyon — Owner · (301) 762-4100
NPI enumeratedJanuary 22, 2014
Last updated in NPPESJanuary 22, 2014
Mailing address966 Hungerford Dr, Suite 18b, Rockville, MD 20850-1714

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