Caitlin Alonzo
Nurse Practitioner • O Fallon, IL
Professional Overview & Biography Verified Profile Summary
Caitlin Alonzo is a certified Nurse Practitioner practicing in O Fallon, IL. With approximately 8 years of clinical experience since completing medical education in 2018, Caitlin Alonzo delivers high-quality medical care to the local community at 1 SAINT ELIZABETH BLVD.
Caitlin Alonzo is affiliated with Cep America-Illinois Hospitalists, Llp and accepts Medicare assignment.
Practice Location & Contact Primary Location
1 Saint Elizabeth Blvd
O Fallon, IL 622691099
Medicare Profile & Education
Other
2018
✓ Accepts Assignment
In-Person Only
Specialty Benchmarks & Practice Insights
Comparative analytics for Nurse Practitioner in O Fallon, IL
Practicing in O Fallon, IL (4929 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Clinical Seniority & Experience Comparison
Medical Specialties & State Licenses
CMS Verified: 2026-03-23NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
NUCC Taxonomy Code: 363LF0000X
Definition to come...
Hospital & Practice Group Affiliations
Cep America-Illinois Hospitalists, Llp
1 Saint Elizabeth Blvd, O Fallon, IL 622691099
Phone: 6182342120
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Physician Assistant
Physician Assistant (Certified)
Emergency Medicine
Doctor of Osteopathic Medicine (D.O.)
Anesthesiology
Doctor of Medicine (M.D.)
Pharmacist
Doctor of Pharmacy (Pharm.D.)
Hospitalist
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Nurse Practitioner (License #209034125 in IL)
NPI status registered as active in NPPES database
Registered at 1 SAINT ELIZABETH BLVD, O FALLON, IL 622691099 (Tel: 6182342120)
Registered at 212 HARBOR VW, FENTON, MO 630267515
Recorded as CAITLIN ALONZO
Nurse Practitioner (License #2025008810 in MO)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
212 Harbor Vw
Fenton, MO 630267515
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