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

Douglas Brian Marks

Individual provider Pharmacist · NPI 1699389221

Douglas Brian Marks is a Pharmacist in Crystal Lake, Illinois. Licensed in Illinois. Registered with an NPI since 2020.

Licensed in
IL
In the registry since
2020

Practice location Address checks out

151 NW Hwy
Crystal Lake, IL 60014-7936
Phone: (815) 455-2460
Fax: (815) 455-1638
Show map & directions

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

Specialties & licences

Pharmacist (primary) Taxonomy 183500000X · Licence 051034433 (IL)

Record details

NPI number1699389221
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedSeptember 1, 2020
Last updated in NPPESSeptember 1, 2020
Certification dateSeptember 1, 2020
Mailing address151 Northwest Hwy, Crystal Lake, IL 60014-7936

Other providers in Crystal Lake