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

Kathryn Grinnen, DO

Individual provider Internal Medicine Physician · NPI 1710102124

Kathryn Grinnen, DO is an Internal Medicine in Lewes, Delaware. Graduated from Lake Erie College of Osteopathic Medicine, Erie in 2006, 20 years ago. Practices with Core Concierge Primary Care and Wellness LLC, a 3-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Delaware and Ohio.

Years since qualifying
20
Trained at
Lake Erie College of Osteopathic Medicine, Erie
Licensed in
DE, OH
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

16295 Willow Creek Rd
Lewes, DE 19958-3614
Phone: (302) 645-3555
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence C2-0009051 (DE)
Internal Medicine Physician Taxonomy 207R00000X · Licence 58002204 (OH)

Record details

NPI number1710102124
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 13, 2007
Last updated in NPPESFebruary 10, 2011
Mailing address15012 Oyster Shell Dr, Milton, DE 19968-3795

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE
Graduated 2006 (20 years in practice)
Group practice Core Concierge Primary Care And Wellness Llc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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