Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Brian A Grus, MD

Individual provider Internal Medicine Physician · NPI 1053421065

Brian A Grus, MD practises Internal Medicine in O Fallon, Missouri. Graduated from Perelman School of Med at the University of Pennsylvania in 1992, 34 years ago. Practices with Physician Groups Lc, a 524-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Missouri.

Years since qualifying
34
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
MO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

20 Progress Point Pkwy Ste 108
O Fallon, MO 63368-2207
Phone: (636) 344-2400
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 20 Progress Point Pkwy, O Fallon, MO 63368-2206 — (636) 344-2400

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 101019 (MO)

Record details

NPI number1053421065
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESFebruary 19, 2021
Certification dateFebruary 19, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 1992 (34 years in practice)
Group practice Physician Groups Lc — 524 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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 patients432
Services billed 2,514 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at Physician Groups Lc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 524 clinicians in the practice; 12 are shown here.

Other providers in O Fallon