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

Mrs. Cassondra Dawn Simmoneau, NP

Individual provider Nurse Practitioner · NPI 1003440215

Mrs. Cassondra Dawn Simmoneau, NP is a Nurse Practitioner in Springfield, Missouri. Qualified in 2019, 7 years ago. Practices with Lester E Cox Medical Centers, a 335-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
7
Licensed in
MO
In the registry since
2020
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

3800 S National Ave Ste 510
Springfield, MO 65807-5284
Phone: (417) 875-3000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (2)

  • 3800 S National Ave Ste 400, Springfield, MO 65807-5272 — (417) 875-3000
  • 3801 S National Ave, Springfield, MO 65807-5210 — (417) 269-7728

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 2019039975 (MO)

Record details

NPI number1003440215
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedFebruary 26, 2020
Last updated in NPPESApril 5, 2023
Certification dateApril 5, 2023

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Lester E Cox Medical Centers — 335 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 patients14
Services billed 19 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $14 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Lester E Cox Medical Centers

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 335 clinicians in the practice; 12 are shown here.

Other providers in Springfield