SSM Health Medical Group
Gina Theisen, APRN-CNP
Family Nurse Practitioner, Nurse Practitioner

SSM Health Medical Group
1603 Wentzville Parkway Wentzville, MO 63385
Gina Theisen, MSN, RN, FNP-C, is a board-certified family nurse practitioner with a specialty in pulmonology. She received her Associate of Science degree in Nursing from Pikes Peak Community College in Colorado Springs, Colorado. She received her Bachelor and Master of Science degrees in nursing from the University of Colorado at Colorado Springs - Helen and Arthur E. Johnson Beth El College of Nursing and Health Sciences, where she graduated summa cum laude.
Before joining SSM Health, Gina practiced as a family nurse practitioner at Douglas Family Medicine in Castle Rock, Colorado. She would develop and manage health care plans for each patient based on findings from initial, follow-up and episodic examinations. After assessing patients, Gina would treat and monitor patients with acute and chronic diseases while maintaining patient safety and delivering expert, compassionate care. She will provide care to patients age 18 years and older.
With her broad base of knowledge and experience, Gina knows that many conditions are interrelated within the pulmonary specialty. She dives deep into all aspects of a patient's health to arrive at a comprehensive solution to a problem. Gina believes that compassion, respect and trust are the cornerstones for every patient and provider encounter.
_"The concept of wellness is uniquely different to every person, and I get to know all of my patients so I can provide them with the highest standard of care, tailored appropriately to their needs. I respect a patient's views regarding their health and we will work together as a team to formulate care plans and achieve optimal outcomes."_
Before joining SSM Health, Gina practiced as a family nurse practitioner at Douglas Family Medicine in Castle Rock, Colorado. She would develop and manage health care plans for each patient based on findings from initial, follow-up and episodic examinations. After assessing patients, Gina would treat and monitor patients with acute and chronic diseases while maintaining patient safety and delivering expert, compassionate care. She will provide care to patients age 18 years and older.
With her broad base of knowledge and experience, Gina knows that many conditions are interrelated within the pulmonary specialty. She dives deep into all aspects of a patient's health to arrive at a comprehensive solution to a problem. Gina believes that compassion, respect and trust are the cornerstones for every patient and provider encounter.
_"The concept of wellness is uniquely different to every person, and I get to know all of my patients so I can provide them with the highest standard of care, tailored appropriately to their needs. I respect a patient's views regarding their health and we will work together as a team to formulate care plans and achieve optimal outcomes."_
About Me
Specialties
Family Nurse Practitioner
Nurse Practitioner
Gender
Female
Education
Universty of Colorado
Bachelor of Science in Nursing, 2015
Universty of Colorado
Master of Science in Nursing, 2017
Hospital Affiliations
SSM Health St. Joseph Hospital - Lake Saint Louis
SSM Health St. Joseph Hospital - St. Charles
Certifications
American Academy of Nurse Practitioners
Missouri State Board of Nursing
Reviews
Rating Breakdown
Reviews are measured on a scale of 1 to 5, with 5 being the best score.
Question Breakdown
4.9Overall Experience4.9Listened Carefully4.9Explained Things Clearly4.8Knew Medical History4.9Involved in Care Decisions4.9Showed Courtesy & Respect
Patient Reviews
SSM Health only displays patient satisfaction data for providers included in our survey process and who have a minimum of 30 returned surveys. The overall rating is an average of all responses to the survey questions listed below. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy. Learn more about our survey.
4.9 out of 5
103 ratings,
41 reviews
8/18/2026
She is awesome
8/16/2026
She takes the time to listen to you and makes sure you understand everything.
8/13/2026
She gives me time to ask questions. Answers them in a way I can understand. Is friendly and easy to talk to.
8/11/2026
Outstanding. Listened and answered all questions
8/8/2026
Very kind, professional, thorough, takes the time needed to answer questions.
Map & Directions
SSM Health Medical Group
1603 Wentzville ParkwayWentzville, MO 63385
Mon
8:30 am - 4:30 pm
Tue
8:30 am - 4:30 pm
Wed
8:30 am - 4:30 pm
Thu
8:30 am - 4:30 pm
Fri
8:30 am - 4:30 pm
Sat
Closed
Sun
Closed
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