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

Gregory Jay Kosters, DO

Individual provider Family Medicine Physician · NPI 1821076886

Gregory Jay Kosters, DO is a Family Practice in Sibley, Iowa. Qualified in 1984, 42 years ago. Practices with Avera McKennan, a 962-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
42
Licensed in
IA
In the registry since
2006
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

600 9th Ave N
Sibley, IA 51249-1012
Phone: (712) 754-3658
Fax: (712) 754-2634
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 02096 (IA)

Record details

NPI number1821076886
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 9, 2006
Last updated in NPPESMarch 7, 2023
Mailing address600 9th Ave N, 277, Sibley, IA 51249-0277

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Also practisesEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 1984 (42 years in practice)
Group practice Avera McKennan — 962 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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