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
Mailing address9200 Watson Rd, Suite G101, Saint Louis, MO 63126-1528

Other providers in O Fallon