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

Allan O Diefendorf, PHD

Individual provider Audiologist · NPI 1447484464

Allan O Diefendorf, PHD is an Audiologist in Indianapolis, Indiana. Licensed in Indiana. Registered with an NPI since 2009.

Licensed in
IN
In the registry since
2009
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

702 Barnhill Dr Ste 0860
Indianapolis, IN 46202-5128
Phone: (317) 630-8970
Fax: (317) 630-8958
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

Audiologist (primary) Taxonomy 231H00000X · Licence 23001934 (IN)

Record details

NPI number1447484464
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedMay 5, 2009
Last updated in NPPESJanuary 29, 2014

Other providers in Indianapolis