Mark Gronski, LPC
Clinical Social Worker · O Fallon, MO
Mark Gronski, LPC is a clinical social worker with a practice address in O Fallon, Missouri, and NPI 1841565363, issued on Mar 16, 2012. Check the license (Missouri 2005000398, as entered in NPPES) with the Missouri board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Gronski
- Credential
- LPC
- Primary taxonomy
- Clinical Social Worker 1041C0700X
- License number
- 2005000398 MO
Self-reported in NPPES; status is on the state search - Practice location
- 311 S Main St, O Fallon, MO 63366
- Phone
- (636) 281-1990
- Enumerated
- Mar 16, 2012
- Record last updated
- Mar 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (636) 281-1995
- Entity
- Type 1 · individual
8 nearest clinical social worker records → All 5,398 in Missouri → Look up another NPI →
Also registered at 311 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carrie Dunning, LPCProfessional Counselor1730420084
- Katie Ingebretson, MSW, LCSWClinical Social Worker1366725277
- Debra JohnsonClinical Social Worker1093052961
Verify Mark Gronski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Missouri board licenses this profession
Search for license 2005000398Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Gronski among 5,398 clinical social worker records in Missouri
Mark Gronski, LPC is one of 5,398 clinical social worker records with a practice address in Missouri. 11% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2012, is newer than 40% of them.
- NPI issued2012 · 40% of these records are older, 57% newer
- In a Medicare fileNo · 11% of these records are
- In the CMS Doctors and Clinicians fileNo · 18% of these records are
- Record last updated2012 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1041C0700X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
40 clinical social worker records list a practice address in O Fallon
They are 40 of the 1,225 NPPES records with a practice address in O Fallon, and 5,398 clinical social worker records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,398 in Missouri → Every provider in O Fallon → Clinical Social Worker nationwide →
The 8 clinical social worker records with the nearest ZIP codes
- Debra Bianchi, LCSWO Fallon, MO 633661205281516
- Steven Buck, LCSWO Fallon, MO 633661952348088
- Elizabeth Eaton, MSW, LCSWO Fallon, MO 633661194881870
- Joy Gillespie, MSW, LCSWO Fallon, MO 633661457761645
- David Grant, LCSWO Fallon, MO 633661639622152
- Linda Herzberg, MSW, LCSWO Fallon, MO 633661811961329
- Katie Ingebretson, MSW, LCSWO Fallon, MO 633661366725277
- Debra JohnsonO Fallon, MO 633661093052961
Common questions
What is Mark Gronski, LPC's NPI number?
Mark Gronski, LPC's National Provider Identifier (NPI) is 1841565363, issued on Mar 16, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gronski, LPC located?
The NPPES record lists a practice address at 311 S Main St, O Fallon, MO, 63366. Phone: (636) 281-1990. Providers update this record themselves, so call before visiting.
How can I verify Mark Gronski, LPC's license?
NPPES lists Missouri license number 2005000398, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.