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

Dr. Gregory J Duffner, DDS

Individual provider General Practice Dentistry · NPI 1225340375

Dr. Gregory J Duffner, DDS is a General Practice Dentistry in Homewood, Illinois. Licensed in Illinois. Registered with an NPI since 2010.

Licensed in
IL
In the registry since
2010
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.

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Practice location Address checks out

18040 Park Ave
Homewood, IL 60430-1606
Phone: (708) 792-2779
Fax: (708) 798-6988
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Dentistry (primary) Taxonomy 1223G0001X · Licence 019-019782 (IL)

Record details

NPI number1225340375
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS
Sole proprietorNo
NPI enumeratedJuly 6, 2010
Last updated in NPPESOctober 23, 2025
Certification dateOctober 23, 2025
Mailing address18040 Park Ave, Homewood, IL 60430-1606

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