Dr. Kathryn Grinnen, DO
Concierge Internal Medicine physician, Rehoboth Beach, DE
Core Concierge HealthDr. Kathryn Grinnen is a Concierge Internal Medicine physician at Core Concierge Health.
Facts on this page last checked October 2026. How we check doctors
About Dr. Grinnen
Dr. Grinnen is board certified in internal medicine. She earned her DO degree from Lake Erie College of Osteopathic Medicine in 2006 and completed an internal medicine residency at MetroHealth Medical Center in Cleveland in 2009. Her residency program included a focus on wellness.
She joined Core Concierge Health. She focuses on adult health, from preventing and diagnosing disease to treating it, along with wellness and preventive care. She recognizes the importance of building strong doctor-patient relationships based on open communication, trust and shared decision-making.
She said that joining Core Concierge Health allows her to provide more personalized care that addresses the unique needs and concerns of each patient.
Membership and fees
Core Concierge Health is a concierge primary care practice.
Membership benefits include same-day appointments and extended visits.
The practice's physicians can come to the patient's home.
Services
Education and credentials
Hospital and practice affiliations
Location
Recognition and research
Media and books
Patient reviews
Questions patients ask
Does Dr. Grinnen offer a membership?
Core Concierge Health is a concierge primary care practice. Membership benefits include same-day appointments and extended visits.
Is Dr. Grinnen board certified?
Dr. Grinnen is board certified in internal medicine.
Where did Dr. Grinnen train?
Dr. Grinnen earned her DO degree from Lake Erie College of Osteopathic Medicine in 2006. She completed her residency in internal medicine at MetroHealth Medical Center in Cleveland in 2009.
Where is Dr. Grinnen's office?
Dr. Grinnen practices at Core Concierge Health.
Do physicians at Core Concierge Health make house calls?
The practice's physicians can come to the patient's home.
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