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

MS. Mary Therese Lyons, RN, APN

Individual provider Critical Care Medicine Clinical Nurse Specialist · NPI 1649475559

MS. Mary Therese Lyons, RN, APN is a Critical Care Medicine Clinical Nurse Specialist in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2007
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
APN — Advanced Practice Nurse
The umbrella title some states use for nurse practitioners and other advanced practice nurses.

See every abbreviation used in this directory →

Practice location Address checks out

1901 W Harrison St
Chicago, IL 60612-3714
Phone: (312) 864-6000
Show map & directions

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

Specialties & licences

Critical Care Medicine Clinical Nurse Specialist (primary) Taxonomy 364SC0200X (IL)

Record details

NPI number1649475559
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , APN
Sole proprietorYes
NPI enumeratedJune 19, 2007
Last updated in NPPESJuly 8, 2007

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