Brian A. Grus, MD
NPI 1053421065ActiveIndividual· Internal Medicine· O Fallon, MO
Internal Medicine (MD) in O Fallon, Missouri, trained at Perelman School of Med at the University of Pennsylvania (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $1,132,138 for 14,822 claims, against $116,644 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2024, $52.82 in all, mostly food and beverage.
Overview
| NPI | 1053421065 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Feb 19, 2021 |
| Certified by provider | Feb 19, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 101019 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 432 |
|---|---|
| Services billed | 2,514 across 37 procedure codes |
| Paid by Medicare | $116,644 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,822 · 35,693 30-day fills |
|---|---|
| Patients | 1,152 |
| Total drug cost | $1,132,138 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Perelman School of Med at the University of Pennsylvania |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Physician Groups LcFarmington, MO · 521 clinicians
- Aging Well Health Care, LLCSaint Louis, MO · 238 clinicians
Hospital affiliations
- Barnes-Jewish St Peters HospitalSaint Peters, MO
- Mercy Hospital St LouisSaint Louis, MO
- Missouri Baptist Medical CenterSaint Louis, MO
- Progress West HospitalOfallon, MO
- St Lukes HospitalChesterfield, MO
Other facilities
- Apollo MedicalHome health agency · Saint Louis, MO
- Bjc Home Care ServicesHome health agency · Saint Louis, MO
- Elara CaringHome health agency · Bridgeton, MO
- Premiere Home HealthHome health agency · Saint Charles, MO
- Ssm Health at Home Home Health-St. LouisHome health agency · Saint Louis, MO
- Ssm Health Rehabilitation HospitalInpatient rehabilitation facility · Richmond Heights, MO
Industry payments (Open Payments)
- 2024$52.82 · 3 payments from 3 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $18.35 | 1 |
| Glaxosmithkline, LLC. | $17.82 | 1 |
| Novo Nordisk Inc | $16.65 | 1 |
What the 2024 payments were for
- Food and Beverage$52.82 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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