IndividualActive
Dan Duffek, PHARMACIST
NPI 1477838985 · Pharmacist · Darien, IL
Provider details
- NPI number
- 1477838985
- Entity type
- Individual
- Primary specialty
- PharmacistPharmacy Service Providers
- Credential
- PHARMACIST
- Sex
- Male
- Sole proprietor
- No
- License
- 051-029157 (IL)
Specialties & taxonomies
Pharmacy Service Providers
Pharmacy Service Providers
Profile Score
Detailed profile(81/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
8300 Lemont Rd
Darien, IL 60561-1510
Phone: (630) 985-6419
Street-level locationGet directions
Mailing address
8300 Lemont Rd
Darien, IL 60561-1510
Registry dates
- Enumerated
- 2011-10-15
- Last updated
- 2011-10-24
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.