Dr. Tomasz A. Kosierkiewicz X, MD
- Medicare services, 2024
- 897
- Medicare patients, 2024
- 190
- Part D claims, 2024
- 1,453
- Hospital affiliations
- 5
- Industry payments
- $354
- Practice address
- 4107 N Water Tower Pl, Mount Vernon, IL 62864
- Practice phone
- Call (618) 242-7350
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mt Vernon Neurology, S.C.
Mount Vernon, Illinois
Find Dr. Kosierkiewicz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Tomasz A. Kosierkiewicz X is a neurologist in Mount Vernon, Illinois
Dr. Kosierkiewicz practices at Mt Vernon Neurology, S.C. in Mount Vernon, Illinois.
Dr. Kosierkiewicz's NPI, 1487645776, was assigned on November 4, 2005. Dr. Kosierkiewicz holds Illinois license 036104826.
- NPI
- 1487645776NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668638537
- NPI enumeration date
- November 4, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (618) 242-7350
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tomasz A. Kosierkiewicz X practices at Mt Vernon Neurology, S.C. in Mount Vernon, Illinois
Dr. Kosierkiewicz's primary practice is Mt Vernon Neurology, S.C., at 4107 N Water Tower Pl, Mount Vernon, IL 62864 in Jefferson County. The practice phone is (618) 242-7350.
- Mt Vernon Neurology, S.C.4107 N Water Tower Pl, Mount Vernon, IL 62864 · Jefferson CountyPhone(618) 242-7350
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Tomasz A. Kosierkiewicz X is affiliated with 7 sites of care
Dr. Kosierkiewicz's primary practice is Mt Vernon Neurology, S.C. in Mount Vernon, Illinois. Dr. Kosierkiewicz is also affiliated with SSM Health Good Samaritan Hospital - Mt. Vernon. Dmand AI also links Dr. Kosierkiewicz to 4 more hospitals and 1 physician office, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Tomasz A. Kosierkiewicz X's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kosierkiewicz practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mt Vernon Neurology, S.C. | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tomasz A. Kosierkiewicz X is one of 822 neurologists in Illinois
Neurology is Dr. Kosierkiewicz's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Kosierkiewicz is licensed in Illinois.
Specialties and state licenses
- Neurology, IllinoisPrimary
Neurologists near Dr. Kosierkiewicz
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Tomasz A. Kosierkiewicz X billed Medicare for 897 services in 2024
CMS data shows 897 Medicare services from Dr. Kosierkiewicz across 13 procedure codes in 2024, for 190 Medicare patients. Medicare paid $107,133 for them. Every service was in an office.
Dr. Kosierkiewicz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5752024: 5671%
- Imaging
- 2023: 1432024: 21752%
- Tests and treatments
- 2023: 842024: 11335%
Dr. Kosierkiewicz compared with the Illinois median for neurologists, 2024
- Dr. Kosierkiewicz
- Illinois median
- Medicare services
- 897vs 4012.2 times
- Medicare patients
- 190vs 22516% below
- Part D claims
- 1,294vs 3184.1 times
Medians across 747 neurologists in Illinois with Dmand AI profiles that report each measure.
Dr. Kosierkiewicz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kosierkiewicz and other neurologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tomasz A. Kosierkiewicz X treated 190 Medicare patients in 2024, average age 74
CMS counts 190 Medicare patients who saw Dr. Kosierkiewicz in 2024. The largest group is 75 to 84, with 90 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.50, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kosierkiewicz's median patient age at 71, with 62% women.
Dr. Kosierkiewicz's Medicare patients by age, 2024
Dr. Kosierkiewicz's Medicare patients by sex, 2024
- Women11158%
- Men7942%
Chronic conditions among Dr. Kosierkiewicz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis72%
- Stroke or TIA46%
- Mood disorders38%
- Anxiety36%
- Diabetes35%
- Depression33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kosierkiewicz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tomasz A. Kosierkiewicz X wrote 1,453 Medicare Part D claims in 2024
In 2024, Dr. Kosierkiewicz wrote 1,453 Medicare Part D claims for 171 patients. 80% of them were for generic drugs. CMS names the drug for 1,294 of them, across 28 drugs with 11 or more claims each, at $307,705 in total drug cost. In 2023, CMS named 1,114 claims across 26 drugs.
Dr. Kosierkiewicz's Part D claims by kind of drug, 2024
- Generic1,164 claims80%
- Brand-name289 claims20%
Dr. Kosierkiewicz's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1142024: 1,29416%
Drugs named by CMS: 28 in 2024, 26 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Tomasz A. Kosierkiewicz X takes part in Medicare
Dr. Kosierkiewicz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Tomasz A. Kosierkiewicz X received $354 in industry payments from 2018 to 2024
CMS Open Payments shows 17 general payments to Dr. Kosierkiewicz from 9 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $116.
General payments to Dr. Kosierkiewicz by program year, 2018 to 2024
Companies that paid Dr. Kosierkiewicz the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Tomasz A. Kosierkiewicz X's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Tomasz A. Kosierkiewicz X
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Tomasz A. Kosierkiewicz X's NPI number?
Dr. Tomasz A. Kosierkiewicz X's NPI number is 1487645776. It was assigned on November 4, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Tomasz A. Kosierkiewicz X?
Dr. Tomasz A. Kosierkiewicz X is a neurologist in Mount Vernon, Illinois. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. Tomasz A. Kosierkiewicz X practice?
Dr. Kosierkiewicz practices at 4107 N Water Tower Pl, Mount Vernon, IL 62864. Dr. Kosierkiewicz's primary practice is Mt Vernon Neurology, S.C. in Mount Vernon, Illinois. Dmand AI also links Dr. Kosierkiewicz to 4 hospitals and 1 physician office.
What is Dr. Tomasz A. Kosierkiewicz X's office phone number?
The practice phone on file for Dr. Kosierkiewicz is (618) 242-7350.
What is Dr. Tomasz A. Kosierkiewicz X's medical license number?
Dr. Kosierkiewicz holds Illinois license 036104826.
Which hospitals is Dr. Tomasz A. Kosierkiewicz X affiliated with?
Dr. Kosierkiewicz is affiliated with SSM Health Good Samaritan Hospital - Mt. Vernon. Dmand AI links Dr. Kosierkiewicz to 4 more hospitals.
Does Dr. Tomasz A. Kosierkiewicz X accept Medicare?
Yes. CMS data shows Dr. Kosierkiewicz billed Medicare for 897 services in 2024, and Dr. Kosierkiewicz accepts Medicare assignment.
How many Medicare patients does Dr. Tomasz A. Kosierkiewicz X see?
CMS counts 190 Medicare patients who saw Dr. Kosierkiewicz in 2024, with an average age of 74.
What services does Dr. Tomasz A. Kosierkiewicz X bill to Medicare?
In 2024, Dr. Kosierkiewicz's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99205) and diagnostic imaging (70553).
What drugs does Dr. Tomasz A. Kosierkiewicz X prescribe most?
In 2024 Medicare Part D data, Dr. Kosierkiewicz's most prescribed drugs by claims were Gabapentin, Rytary and Pregabalin.
Has Dr. Tomasz A. Kosierkiewicz X received payments from drug or device companies?
CMS Open Payments shows $354 in general payments to Dr. Kosierkiewicz from 9 companies from 2018 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Tomasz A. Kosierkiewicz X been practicing?
Dr. Kosierkiewicz graduated from medical school in 1989, 37 years ago.
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