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

Mrs. Ragean Marie Muessig, MSN, APRN, FNP-BC

Individual provider Family Nurse Practitioner · NPI 1295233633

Mrs. Ragean Marie Muessig, MSN, APRN, FNP-BC is a Nurse Practitioner in Saint Louis, Missouri. Qualified in 2017, 9 years ago. Practices with Mercy ACO Clinical Services Inc, a 138-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
9
Licensed in
MO
In the registry since
2018
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
FNP-BC — Family Nurse Practitioner, Board Certified
A family nurse practitioner certified by the ANCC.

See every abbreviation used in this directory →

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Practice location Address checks out

701 S New Ballas Rd Ste 330
Saint Louis, MO 63141-8725
Phone: (314) 251-8850
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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 2017024381 (MO)

Record details

NPI number1295233633
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , APRN , FNP-BC
Sole proprietorNo
NPI enumeratedJanuary 31, 2018
Last updated in NPPESSeptember 22, 2026
Certification dateSeptember 22, 2026

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 Mercy Aco Clinical Services Inc — 138 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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 $38 2 payments · 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 Mercy ACO Clinical Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 138 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis