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

Individual provider Addiction Medicine (Internal Medicine) Physician · NPI 1073926929

Sarah E Messmer, MD is an Addiction Medicine (Internal Medicine) Physician in Chicago, Illinois. Works from 2 locations. Licensed in Illinois and Massachusetts.

Licensed in
IL, MA
In the registry since
2014
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

840 S Wood St Rm 440 Clinical Sciences North Bldg
Chicago, IL 60612
Phone: (312) 996-4242
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1740 W Taylor St, Chicago, IL 60612-7232 — (312) 996-7416

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036.145844 (IL)
Addiction Medicine (Internal Medicine) Physician Taxonomy 207RA0401X · Licence 036.145844 (IL)
Pediatrics Physician Taxonomy 208000000X · Licence L-259415 (MA)
Pediatrics Physician Taxonomy 208000000X · Licence 036.145844 (IL)

Record details

NPI number1073926929
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 9, 2014
Last updated in NPPESOctober 31, 2025
Certification dateOctober 31, 2025

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