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

Dr. Graham Howerzyl, DDS

Individual provider General Practice Dentistry · NPI 1659217859

Dr. Graham Howerzyl, DDS is a General Practice Dentistry in Sioux Center, Iowa. Practices as a sole proprietor. Licensed in Iowa.

Licensed in
IA
In the registry since
2026
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

159 S Main Ave
Sioux Center, IA 51250-1535
Phone: (712) 722-2618
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence DDS-10511 (IA)

Record details

NPI number1659217859
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorYes
NPI enumeratedApril 28, 2026
Last updated in NPPESJune 23, 2026
Certification dateJune 23, 2026
Mailing address327 Parkview Ct, North Liberty, IA 52317-9640

Other providers in Sioux Center