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

MS. Sienna Monagan Lyon, LGPC

Individual provider Mental Health Counselor · NPI 1730966938

MS. Sienna Monagan Lyon, LGPC is a Mental Health Counselor in Cabin John, Maryland. Practices as a sole proprietor. Licensed in Maryland.

Licensed in
MD
In the registry since
2023

Practice location Address checks out

7945 Macarthur Blvd Ste 214
Cabin John, MD 20818-1634
Phone: (301) 987-7284
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence LGP14303 (MD)

Record details

NPI number1730966938
Entity typeIndividual (Type 1)
GenderFemale
Credentials LGPC
Sole proprietorYes
NPI enumeratedSeptember 11, 2023
Last updated in NPPESSeptember 11, 2023
Certification dateSeptember 11, 2023

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