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

Dr. Darwin Martin Koller, MD

Individual provider Pediatric Emergency Medicine (Pediatrics) Physician · NPI 1568495638

Dr. Darwin Martin Koller, MD is an Emergency Medicine in Springdale, Arkansas. Qualified in 2005, 21 years ago. Practices with Inphynet Contracting Services LLC, a 170-clinician group and accepts Medicare assignment. Licensed in Arkansas and Tennessee.

Years since qualifying
21
Licensed in
AR, TN
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2601 Gene George Blvd
Springdale, AR 72762-0845
Phone: (479) 725-6800
Fax: (479) 725-6582
Show map & directions

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

Specialties & licences

Pediatric Emergency Medicine (Pediatrics) Physician (primary) Taxonomy 2080P0204X · Licence E-18596 (AR)
Pediatrics Physician Taxonomy 208000000X · Licence MD39891 (TN)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 39891 (TN)

Record details

NPI number1568495638
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 9, 2006
Last updated in NPPESMay 6, 2026
Certification dateMay 6, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Inphynet Contracting Services Llc — 170 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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