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

Gina Bertini Theisen, FNP-C

Individual provider Family Nurse Practitioner · NPI 1235640582

Gina Bertini Theisen, FNP-C is a Nurse Practitioner in Wentzville, Missouri. Qualified in 2017, 9 years ago. Practices with SSM Medical Group Inc, a 560-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado and Missouri.

Years since qualifying
9
Licensed in
CO, MO
In the registry since
2017
Specialties on file
2
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

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Practice location Address checks out

1603 Wentzville Pkwy
Wentzville, MO 63385-3826
Phone: (636) 332-8228
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1189 S Perry St Ste 230, Castle Rock, CO 80104-1959 — (303) 688-3434

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 2020031798 (MO)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence APN.0993335-NP (CO)

Record details

NPI number1235640582
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedOctober 13, 2017
Last updated in NPPESNovember 24, 2020
Certification dateNovember 24, 2020

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Ssm Medical Group Inc — 560 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients203
Services billed 344 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Ssm St Joseph Health Center Hospital · Saint Charles, MO · listed as St Joseph Health Center
  • Ssm St Joseph Hospital West Hospital · Lake Saint Louis, MO

Colleagues at SSM Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 560 clinicians in the practice; 12 are shown here.

Other providers in Wentzville