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

Individual provider Family Nurse Practitioner · NPI 1336659523

Jennifer L Martens, FNP is a Nurse Practitioner in O Fallon, Illinois. Qualified in 2014, 12 years ago. Practices with Southeastern Physician Services PC, a 598-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
12
Licensed in
IL
In the registry since
2017
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

1 Saint Elizabeth Blvd
O Fallon, IL 62269-1099
Phone: (618) 234-2120
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 209016645 (IL)

Record details

NPI number1336659523
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorNo
NPI enumeratedOctober 3, 2017
Last updated in NPPESSeptember 10, 2024
Certification dateSeptember 10, 2024

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Southeastern Physician Services Pc — 598 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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