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

Mark Gronski, LPC

Individual provider Clinical Social Worker · NPI 1841565363

Mark Gronski, LPC is a Clinical Social Worker in O Fallon, Missouri. Practices as a sole proprietor. Licensed in Missouri.

Licensed in
MO
In the registry since
2012
What do these letters mean?
LPC — Licensed Professional Counselor
A licensed mental health counsellor.

See every abbreviation used in this directory →

Practice location Address checks out

311 S Main St Ste 100
O Fallon, MO 63366-2807
Phone: (636) 281-1990
Fax: (636) 281-1995
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 2005000398 (MO)

Record details

NPI number1841565363
Entity typeIndividual (Type 1)
GenderMale
Credentials LPC
Sole proprietorYes
NPI enumeratedMarch 16, 2012
Last updated in NPPESMarch 16, 2012

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