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

Individual provider Behavior Analyst · NPI 1609123835

Mr. Mark Willer, BCBA is a Behavior Analyst in Fairfax, Virginia. Practices as a sole proprietor. Licensed in Virginia.

Licensed in
VA
In the registry since
2012
What do these letters mean?
BCBA — Board Certified Behavior Analyst
Designs and supervises applied behaviour analysis programmes, often for autism.

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Practice location Address checks out

4102 Middle Ridge Dr
Fairfax, VA 22033-3226
Phone: (703) 507-9992
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Behavior Analyst (primary) Taxonomy 103K00000X · Licence 1-12-11579 (VA)

Record details

NPI number1609123835
Entity typeIndividual (Type 1)
GenderMale
Credentials BCBA
Sole proprietorYes
NPI enumeratedAugust 7, 2012
Last updated in NPPESAugust 7, 2012
Mailing address4102 Middle Ridge Dr, Fairfax, VA 22033

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