Dr. Brian A Grus , MD
Internal Medicine โข O Fallon, MO
20 Progress Point Pkwy Ste 108
O Fallon, MO 633682207
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on August 30, 2006; this date does not establish years in practice.
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Published CMS data list 2,104 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 36415 โ Insertion of needle into vein for collection of blood sample: 475 service units.
- 99213 โ Established patient outpatient office visit: 453 service units.
- G0439 โ Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 303 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 13 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 14,003 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium โ 800 prescription fills, including refills.
- Lisinopril โ 613 prescription fills, including refills.
- Amlodipine Besylate โ 603 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 179 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,304 clinicians with data). Median for this group: 636. Middle half: 273 to 1,166.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 2,424 in 2020 to 2,104 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
20 Progress Point Pkwy Ste 108
O Fallon, MO 633682207
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in O Fallon, MO. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: Aging Well Health Care, Llc; Physician Groups Lc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Perelman School Of Med At The University Of Pennsylvania
1992
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
432 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $137,331 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $110,757 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
33,888 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$936,916 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2024
All general payments: $52.82 across 3 records.
By nature of payment
- Food and Beverage: $52.82 across 3 records.
Reporting-company totals
- Pfizer Inc.: $18.35 across 1 record.
- GlaxoSmithKline, LLC.: $17.82 across 1 record.
- Novo Nordisk Inc: $16.65 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).
Years since graduation
34 years (graduated 1992)
CMS Doctors and Clinicians data list 1992 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Grus has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Grus as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in O Fallon and Missouri
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,304 clinicians with data). Median for this group: 636. Middle half: 273 to 1,166.
Too few clinicians listed under Internal Medicine in O Fallon have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,304 clinicians with data). Median for this group: $58,496. Middle half: $24,542 to $99,993.
Too few clinicians listed under Internal Medicine in O Fallon have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,304 clinicians with data). Median for this group: $44,917. Middle half: $18,290 to $76,772.
Too few clinicians listed under Internal Medicine in O Fallon have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in O Fallon, MO (2024, 14 clinicians with data). Median for this group: 3,074. Middle half: 438 to 7,421.
More Part D prescriptions than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,535 clinicians with data). Median for this group: 771. Middle half: 122 to 7,845.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Internal Medicine in O Fallon, MO (2024, 14 clinicians with data). Median for this group: $342,418. Middle half: $15,156 to $838,115.
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Missouri (2024, 1,535 clinicians with data). Median for this group: $59,863. Middle half: $2,451 to $575,890.
17 active clinicians are listed under Internal Medicine with a practice address in O Fallon, MO (2,605 in Missouri).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in O Fallon
35.3% of these 17 clinicians have the CMS telehealth indicator.
76.5% of these 17 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 13% from 2,424 in 2020 to 2,104 in 2024.
- 2020: 2,424
- 2021: 2,223
- 2022: 2,210
- 2023: 2,209
- 2024: 2,104
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $145,048 in 2020 and $137,331 in 2024.
- 2020: $145,048
- 2021: $169,675
- 2022: $165,745
- 2023: $168,039
- 2024: $137,331
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Paid by Medicare
Paid by Medicare stayed about the same: $115,617 in 2020 and $110,757 in 2024.
- 2020: $115,617
- 2021: $133,753
- 2022: $131,164
- 2023: $136,773
- 2024: $110,757
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 43% from 9,768 in 2020 to 14,003 in 2024.
- 2020: 9,768
- 2021: 10,620
- 2022: 12,118
- 2023: 13,217
- 2024: 14,003
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30-day fills
30-day fills increased 42% from 23,915 in 2020 to 33,888 in 2024.
- 2020: 23,915
- 2021: 25,912
- 2022: 29,604
- 2023: 32,545
- 2024: 33,888
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Part D drug cost
Part D drug cost increased 108% from $449,999 in 2020 to $936,916 in 2024.
- 2020: $449,999
- 2021: $514,941
- 2022: $644,072
- 2023: $955,598
- 2024: $936,916
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $148.74 in 2019 to $52.82 in 2024.
- 2019: $148.74
- 2020: $15.16
- 2022: $114.43
- 2023: $178.35
- 2024: $52.82
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 โ December 31, 2024): fewer than 11 records totaling $52.82.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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NURTEC ODT | General | $18.35 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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SHINGRIX | General | $17.82 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $16.65 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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36415
Insertion of needle into vein for collection of blood sample
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475 | 313 | $15.00 | $8.65 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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453 | 247 | $187.00 | $86.80 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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303 | 303 | $222.00 | $124.42 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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303 | 207 | $23.00 | $15.82 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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232 | 165 | $229.10 | $120.61 |
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G0008
Administration of influenza virus vaccine
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108 | 107 | $81.08 | $31.21 |
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90662
Influenza vaccine split virus, preservative free
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101 | 100 | $88.00 | $81.53 |
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G0180
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
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29 | 27 | $109.00 | $51.27 |
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99495
Transitional care management services for problem of at least moderate complexity
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26 | 25 | $364.00 | $197.77 |
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81002
Urinalysis, manual test
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24 | 20 | $13.00 | $3.41 |
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90480
Admn sarscov2 vacc 1 dose
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19 | 19 | $40.00 | $39.20 |
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91320
Sarscv2 vac 30mcg trs-suc im
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19 | 19 | $133.00 | $130.34 |
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G0438
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
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12 | 12 | $333.00 | $157.57 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 800 | 69,836 | $6,806.66 | 225 |
| Lisinopril | Lisinopril | 613 | 53,252 | $3,587.04 | 166 |
| Amlodipine Besylate | Amlodipine Besylate | 603 | 48,938 | $3,592.65 | 155 |
| Levothyroxine Sodium | Levothyroxine Sodium | 572 | 48,254 | $5,932.24 | 143 |
| Losartan Potassium | Losartan Potassium | 361 | 29,345 | $2,613.75 | 101 |
| Simvastatin | Simvastatin | 333 | 29,303 | $2,457.27 | 91 |
| Metoprolol Succinate | Metoprolol Succinate | 297 | 26,080 | $3,898.36 | 89 |
| Alprazolam | Alprazolam | 280 | 10,147 | $1,493.75 | 84 |
| Pantoprazole Sodium | Pantoprazole Sodium | 270 | 22,910 | $3,837.28 | 87 |
| Metformin Hcl | Metformin Hcl | 261 | 23,557 | $1,817.41 | 78 |
| Omeprazole | Omeprazole | 254 | 20,882 | $3,214.39 | 72 |
| Tamsulosin Hcl | Tamsulosin Hcl | 223 | 19,113 | $3,384.13 | 66 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 222 | 19,450 | $1,494.34 | 59 |
| Hydrochlorothiazide | Hydrochlorothiazide | 221 | 18,854 | $1,092.28 | 62 |
| Gabapentin | Gabapentin | 199 | 15,961 | $3,756.00 | 67 |
| Metformin Hcl Er | Metformin Hcl | 198 | 17,717 | $1,330.37 | 63 |
| Escitalopram Oxalate | Escitalopram Oxalate | 197 | 14,117 | $2,415.82 | 52 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 192 | 13,490 | $1,950.46 | 51 |
| Metoprolol Tartrate | Metoprolol Tartrate | 182 | 16,412 | $945.01 | 53 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 177 | 6,373 | $4,235.47 | 61 |
| Tramadol Hcl | Tramadol Hcl | 173 | 3,535 | $1,025.02 | 70 |
| Meloxicam | Meloxicam | 169 | 13,330 | $665.22 | 56 |
| Pravastatin Sodium | Pravastatin Sodium | 167 | 14,435 | $2,474.15 | 50 |
| Trazodone Hcl | Trazodone Hcl | 167 | 13,568 | $1,133.57 | 54 |
| Glimepiride | Glimepiride | 166 | 14,002 | $1,099.57 | 51 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-02-19NUCC Taxonomy Code: 207R00000X
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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20070223000563
MO
4688776511
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Physician Groups Lc
1110 Highlands Plaza Dr E, Saint Louis, MO 631101351
Phone: 3142730195
Aging Well Health Care, Llc
7212 Balson Ave, Saint Louis, MO 631303001
Physician Groups Lc
2630 Hwy K, O Fallon, MO 633686624
Phone: 6362405454
Secondary Practice Locations
20 Progress Point Pkwy, Ste 108
O Fallon, MO 633682206
Phone: 6363442400
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
Nurse Practitioner
Nurse Practitioner - Adult Health
Adult Nurse Practitioner
Nurse Practitioner
Family Nurse Practitioner (Certified)
Nurse Practitioner - Family
Nurse Practitioner (Certified)
Nurse Practitioner - Family
Nurse Practitioner
Physician Assistant
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 20 PROGRESS POINT PKWY STE 108, O FALLON, MO 633682207 (Tel: 6363442400)
Registered at 20 PROGRESS POINT PKWY STE 108, O FALLON, MO 633682207 (Tel: 6363442400)
Recorded as BRIAN GRUS, MD
NPI status registered as active in NPPES database
Registered at 20 PROGRESS POINT PKWY, STE 108, O FALLON, MO 633682206 (Tel: 6363442400)
Registered at 670 MASON RIDGE CENTER DR, STE 300, SAINT LOUIS, MO 631418573 (Tel: 6363442404)
Recorded as BRIAN GRUS
Internal Medicine (license number reported to NPPES: MO 101019)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in O Fallon
- Dr. Gary Gray, MD
- Dr. Naman Ghazal-Albar, MD
- Dr. Kent Alexander Cassmeyer, MD
- Dr. Aaron Steimel, DO
- Dr. Kevin Weikart, MD
- Dr. Daniela Blum Morales, MD
More public profiles in Missouri
Directory navigation, in NPI number order.
- Lacey Nelson, PA-C Physician Assistant - Surgical ยท N. Kansas City
- Matthew Wyatt, MD Anesthesiology ยท Saint Louis
- Nanda Deepa Thimmappa, MD Radiology - Diagnostic Radiology ยท Columbia
- Richard Blalock, DC Chiropractor ยท Saint Peters
- Kathryn Potts, FNP Nurse Practitioner - Family ยท Kansas City
- Sarah Hossain, MD, MPH Internal Medicine - Gastroenterology ยท Springfield
- Dustin Mcknight, MD Ophthalmology ยท Liberty
- Mimi Propst, MD Family Medicine ยท Springfield
- Olta Cuci, OD Optometrist ยท Saint Louis
- Brandi House, FNP Nurse Practitioner - Family ยท Farmington
- Timothy Fendler, MD Internal Medicine - Advanced Heart Failure and Transplant Cardiology ยท Lees Summit
- Erin Wiesner, PA Physician Assistant ยท Saint Louis
Mailing Address
20 Progress Point Pkwy Ste 108
O Fallon, MO 633682207
Phone: 6363442400