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

MS. Martha Lynn Fitzsimon, LMSW

Individual provider Mental Health Counselor · NPI 1841923091

MS. Martha Lynn Fitzsimon, LMSW is a Mental Health Counselor in Fairfax, Virginia. Licensed in Virginia. Registered with an NPI since 2022.

Licensed in
VA
In the registry since
2022
What do these letters mean?
LMSW — Licensed Master Social Worker
A master's-level social worker, usually practising under supervision.

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Practice location Address checks out

8221 Willow Oaks Corporate Dr
Fairfax, VA 22031-4512
Phone: (571) 623-3529
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 0903002855 (VA)

Record details

NPI number1841923091
Entity typeIndividual (Type 1)
GenderFemale
Credentials LMSW
Sole proprietorNo
NPI enumeratedJuly 6, 2022
Last updated in NPPESJuly 6, 2022
Certification dateJuly 6, 2022

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients16
Services billed 16 a service is one billed item, such as a visit, a test or a procedure
Average patient age58

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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