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

Dr. Gregory A Keifer, DO

Individual provider General Practice Physician · NPI 1184127912

Dr. Gregory A Keifer, DO is a General Practice in Big Pine Key, Florida. Graduated from Marian University College of Osteopathic Medicine in 2017, 9 years ago. Practices with David F Grider PA, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Florida.

Years since qualifying
9
Trained at
Marian University College of Osteopathic Medicine
Licensed in
FL
In the registry since
2018
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

29980 Overseas Hwy
Big Pine Key, FL 33043-3362
Phone: (305) 872-3321
Fax: (305) 422-9579
Show map & directions

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

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence OS15605 (FL)

Record details

NPI number1184127912
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedMarch 18, 2018
Last updated in NPPESJanuary 28, 2025
Certification dateJanuary 28, 2025
Mailing address29980 Overseas Hwy, Big Pine Key, FL 33043-3362

Medicare enrollment

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

Medicare specialtyGENERAL PRACTICE
Medical schoolMARIAN UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2017 (9 years in practice)
Group practice David F Grider Pa — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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