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

Mary Gretchen O Connor, PT

Individual provider Geriatric Physical Therapist · NPI 1861941346

Mary Gretchen O Connor, PT is registered under Physical Therapist in Private Practice in Grayslake, Illinois. Qualified in 1987, 39 years ago. Practices with Grayslake Rehabilitation and Complete Physical Therapy LLC, a 13-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
39
Licensed in
IL
In the registry since
2016
What do these letters mean?
PT — Physical Therapist
A licensed therapist who treats movement, pain and injury.

See every abbreviation used in this directory →

Practice location Address checks out

997 N Corporate Cir
Grayslake, IL 60030-7822
Phone: (847) 223-8001
Show map & directions

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

Specialties & licences

Geriatric Physical Therapist (primary) Taxonomy 2251G0304X · Licence 070.019894 (IL)

Record details

NPI number1861941346
Entity typeIndividual (Type 1)
GenderFemale
Credentials PT
Sole proprietorNo
NPI enumeratedSeptember 26, 2016
Last updated in NPPESOctober 3, 2016

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICAL THERAPIST IN PRIVATE PRACTICE
Medical schoolOTHER
Graduated 1987 (39 years in practice)
Group practice Grayslake Rehabilitation And Complete Physical Therapy Llc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients35
Services billed 1,608 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Grayslake Rehabilitation and Complete Physical Therapy LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Grayslake