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

Dr. Ronald James Losiewicz, DC

Individual provider Orthopedic Chiropractor · NPI 1235165457

Dr. Ronald James Losiewicz, DC is an Orthopedic Chiropractor in Lyons, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2006
Specialties on file
2
What do these letters mean?
DC — Doctor of Chiropractic
A licensed chiropractor.

See every abbreviation used in this directory →

Practice location Address checks out

3840 S Harlem Ave
Lyons, IL 60534
Phone: (708) 442-3050
Fax: (708) 442-3058
Show map & directions

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

Specialties & licences

Chiropractor (primary) Taxonomy 111N00000X · Licence 038009846 (IL)
Orthopedic Chiropractor Taxonomy 111NX0800X · Licence 038-009846 (IL)

Record details

NPI number1235165457
Entity typeIndividual (Type 1)
GenderMale
Credentials DC
Sole proprietorYes
NPI enumeratedJune 23, 2006
Last updated in NPPESApril 24, 2008
Mailing address6149 Knoll Wood Road, Unit 202, Willowbrook, IL 60527