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

Lynn Sewester Underwood, MA, LCPC

Individual provider Counselor · NPI 1700353679

Lynn Sewester Underwood, MA, LCPC is a Mental Health Counselor in O Fallon, Illinois. Qualified in 2015, 11 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
11
Licensed in
IL
In the registry since
2018
Specialties on file
2
What do these letters mean?
MA — Master of Arts
A graduate arts degree.
LCPC — Licensed Clinical Professional Counselor
A licensed clinical counsellor.

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Practice location Address checks out

791 Wall St
O Fallon, IL 62269-2087
Phone: (618) 514-1154
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence 180.011860 (IL)
Counselor Taxonomy 101Y00000X · Licence 180.011860 (IL)

Record details

NPI number1700353679
Entity typeIndividual (Type 1)
GenderFemale
Credentials MA , LCPC
Sole proprietorYes
NPI enumeratedOctober 30, 2018
Last updated in NPPESNovember 17, 2025
Certification dateNovember 17, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2015 (11 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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