Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mrs. Margaux Ann Weller I, FNP-BC

Individual provider Family Nurse Practitioner · NPI 1083153589

Mrs. Margaux Ann Weller I, FNP-BC is a Nurse Practitioner in Saint Charles, Missouri. Qualified in 2014, 12 years ago. Practices with SSM Medical Group Inc, a 560-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
12
Licensed in
MO
In the registry since
2017
What do these letters mean?
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

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Practice location Address checks out

300 1st Capitol Dr
Saint Charles, MO 63301-2844
Phone: (636) 947-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 400 1st Capitol Dr Ste 201, Saint Charles, MO 63301-2882 — (636) 669-2332

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 2011019986 (MO)

Record details

NPI number1083153589
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-BC
Sole proprietorNo
NPI enumeratedFebruary 16, 2017
Last updated in NPPESNovember 10, 2020
Certification dateNovember 10, 2020

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 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 patients87
Services billed 111 a service is one billed item, such as a visit, a test or a procedure
Average patient age80

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 Saint Charles