Brian A Grus, MD
Brian a Grus, MD practices as part of a group internist practice in O Fallon, MO. He graduated from Perelman School of Med at the University of Pennsylvania in 1992 and has 34+ years of clinical experience. He regularly sees Medicare patients with hypertension, high cholesterol, and arthritis (per CMS claims data).
At a glance
- Prescribes opioids less than 27% of reporting doctors in Missouri
- Uses generic medications more than 54% of reporting doctors in Missouri
- Virtual visits available — no app or travel required
Older · 1902dNPPES updated 2021-02-19 · verify on CMS
Contact & Location
Practice Location
20 Progress Point Pkwy Ste 108, O Fallon, MO 63368-2207
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better2.9%
Missouri avg: 4.4 · US avg: 5.1
✓ Higher than most doctors nationally(-2.2 pts)
2.9% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better88.6%
Missouri avg: 83.4 · US avg: 82.8
✓ Higher than most doctors nationally(+5.8 pts)
Typical range among reporting doctors in MissouriHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
467
Unique beneficiaries
Standard volumePrescription Recipients
1,079
Patients prescribed
Prescriptions Written
13,997
Total claims
Total Medicare drug cost: $1.14M
Percentile rankings compared against 912 reporting peers in Missouri.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-2%) — less common here
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-12%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-7%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-6%) — less common here
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↑ More patients than average (+3%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-8%) — less common here
Conditions affecting emotional state, including depression and bipolar disorder
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↓ Fewer patients than average (-8%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$53 received from industry
3 transactions reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Brian a Grus's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1992
Perelman School of Medicine at the University of Pennsylvania
Board certified · Feb 18, 2021
CMS-verified certification date
34 years in practice
Senior practitioner
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Education & Training
Perelman School of Med at the University of Pennsylvania (Class of 1992)
Virtual Internal Medicine Care With Brian a Grus
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Brian a Grus for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to O Fallon required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Brian a Grus
Dr. Grus is listed as active in the NPI registry with telehealth listed in O Fallon, MO. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (636) 344-2400.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Brian a Grus
Practice Location
20 Progress Point Pkwy Ste 108, O Fallon, MO 63368-2207
Mailing Address
20 Progress Point Pkwy Ste 108, O Fallon, MO 63368-2207
This is a provider directory. Contact the office directly to schedule appointments.
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