NPPES file of Aug 9, 2026

Casey Elizabeth Marks, M.S.CCC-SLP

Speech-Language Pathologist · Maryville, IL

Casey Elizabeth Marks, M.S.CCC-SLP is a speech-language pathologist with a practice address in Maryville, Illinois, and NPI 1538438445, issued on Dec 21, 2011. Check the license (Illinois 146010640, as entered in NPPES) with the Illinois board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1538438445
Name
Casey Elizabeth Marks
Credential
M.S.CCC-SLP
Primary taxonomy
Speech-Language Pathologist 235Z00000X
License number
146010640 IL
Self-reported in NPPES; status is on the state search
Practice location
2201 Copper Creek RD, Maryville, IL 62062
Phone
(618) 972-8475
Enumerated
Dec 21, 2011
Record last updated
Nov 8, 2022
Medicare enrollment
Enrolled (PECOS I20221121001647); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Verify Casey Elizabeth Marks in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 146010640
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Empowerme Rehabilitation Illinois LLCEdwardsville, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Casey Elizabeth Marks among 10,224 speech-language pathologist records in Illinois

Casey Elizabeth Marks, M.S.CCC-SLP is one of 10,224 speech-language pathologist records with a practice address in Illinois. 3% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 27% of them.

  • NPI issued2011 · 27% of these records are older, 70% newer
  • In a Medicare fileYes · 3% of these records are
  • In the CMS Doctors and Clinicians fileYes · 4% of these records are
  • Graduated2010 · median 2015 among the 406 with a school on file
  • Record last updated2022 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 235Z00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

31 speech-language pathologist records list a practice address in Maryville

They are 31 of the 414 NPPES records with a practice address in Maryville, and 10,224 speech-language pathologist records in Illinois.

The 8 speech-language pathologist records with the nearest ZIP codes

  1. Barbara Allen, MS.CCC-SLPMaryville, IL 620621033244728
  2. Barbara Baird, MS,CCC-SLPMaryville, IL 620621609901396
  3. Tammy Becherer, MS,CCC-SLPMaryville, IL 620621154456853
  4. Carol Belanger, MS,CCC-SLPMaryville, IL 620621467587170
  5. Jill Butler, MS, CCC/SLPMaryville, IL 620621144325218
  6. Monica Carroll, MS, CCC-SLPMaryville, IL 620621881883486
  7. Sarah Daymon, MS, CCC-SLPMaryville, IL 620621508024506
  8. Kathryn Diak, MS,CCC-SLPMaryville, IL 620621528193257

Common questions

What is Casey Elizabeth Marks, M.S.CCC-SLP's NPI number?

Casey Elizabeth Marks, M.S.CCC-SLP's National Provider Identifier (NPI) is 1538438445, issued on Dec 21, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Casey Elizabeth Marks, M.S.CCC-SLP located?

The NPPES record lists a practice address at 2201 Copper Creek RD, Maryville, IL, 62062. Phone: (618) 972-8475. Providers update this record themselves, so call before visiting.

How can I verify Casey Elizabeth Marks, M.S.CCC-SLP's license?

NPPES lists Illinois license number 146010640, as entered by the provider. Search the Illinois 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. Medicare files from data.cms.gov. 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.