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

Richard Justus Siebert, MD

Individual provider Internal Medicine Physician · NPI 1205985157

Richard Justus Siebert, MD is an Internal Medicine Physician in Lake Forest, Illinois. Licensed in Illinois. Registered with an NPI since 2007.

Licensed in
IL
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

700 N Westmoreland Rd
Lake Forest, IL 60045-1679
Phone: (847) 234-8808
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X (IL)

Record details

NPI number1205985157
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 9, 2007
Last updated in NPPESJuly 8, 2007
Mailing address700 N Westmoreland Rd, Lake Forest, IL 60045-1679

Other providers in Lake Forest