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

Dr James G Heffernan DDS, PC

Organization Endodontics · NPI 1316013261

Dr James G Heffernan DDS, PC is an Endodontics in Geneva, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

403 Williamsburg Ave
Geneva, IL 60134-1091
Phone: (630) 406-5790
Fax: (630) 208-7677
Show map & directions

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

Specialties & licences

Endodontics (primary) Taxonomy 1223E0200X (IL)

Record details

NPI number1316013261
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official James Heffernan — President · (630) 208-7668
NPI enumeratedNovember 24, 2006
Last updated in NPPESAugust 22, 2020
Mailing address403 Williamsburg Ave, Geneva, IL 60134-1091