Dr. Leroy Stewart Thomson III, MD
- Medicare services, 2024
- 158
- Medicare patients, 2024
- 252
- Hospital affiliations
- 1
- Industry payments
- $3,469
- Medical group
- 1
- Practice address
- 450 West Highway 22, Barrington, IL 60010
- Practice phone
- Call (847) 381-9600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Thomson'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. Leroy Stewart Thomson III is an anesthesiologist in Barrington, Illinois
Dr. Thomson practices at Advocate Good Shepherd Hospital in Barrington, Illinois, part of Advocate Health.
Dr. Thomson's NPI, 1477651750, was assigned on September 20, 2006. Dr. Thomson holds Illinois license 036.119201.
- NPI
- 1477651750NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496754897
- NPI enumeration date
- September 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 381-9600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leroy Stewart Thomson III practices at Advocate Good Shepherd Hospital in Barrington, Illinois
Dr. Thomson's primary practice is Advocate Good Shepherd Hospital, at 450 West Highway 22, Barrington, IL 60010 in Lake County. The practice phone is (847) 381-9600.
- Advocate Good Shepherd Hospital450 West Highway 22, Barrington, IL 60010 · Lake CountyPhone(847) 381-9600
Source: Dmand AI Affiliation Data
Dr. Leroy Stewart Thomson III is affiliated with 1 site of care and 1 medical group
Dr. Thomson's primary practice is Advocate Good Shepherd Hospital in Barrington, Illinois, part of Advocate Health. The medical group on file is Barrington Anesthesia Associates.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Leroy Stewart Thomson III's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advocate Good Shepherd Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Leroy Stewart Thomson III is one of 1,887 anesthesiologists in Illinois
Anesthesiology is Dr. Thomson's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dmand AI has Dr. Thomson's licenses on file in 2 states: Illinois and Arizona.
Specialties and state licenses
- Anesthesiology, IllinoisPrimary
- Arizona license
Anesthesiologists near Dr. Thomson
Counts of anesthesiologists 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. Leroy Stewart Thomson III billed Medicare for 158 services in 2024
CMS data shows 158 Medicare services from Dr. Thomson across 7 procedure codes in 2024, for 252 Medicare patients. Medicare paid $19,827 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Thomson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 1702024: 13918%
- Surgery
- 2023: 142024: 1936%
Dr. Thomson compared with the Illinois median for anesthesiologists, 2024
- Dr. Thomson
- Illinois median
- Medicare services
- 158vs 9174% above
- Medicare patients
- 252vs 15761% above
Medians across 1,742 anesthesiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Thomson'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.
Need commercial claims for Dr. Thomson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thomson and other anesthesiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leroy Stewart Thomson III treated 252 Medicare patients in 2024, average age 75
CMS counts 252 Medicare patients who saw Dr. Thomson in 2024. The largest group is 65 to 74, with 124 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.29, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Thomson's median patient age at 62, with 58% women.
Dr. Thomson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Thomson's Medicare patients by sex, 2024
- Women13453%
- Men11847%
Chronic conditions among Dr. Thomson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis60%
- Ischemic heart disease38%
- Anxiety31%
- Diabetes31%
- Chronic kidney disease27%
- Atrial fibrillation25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Thomson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Leroy Stewart Thomson III takes part in Medicare
Dr. Thomson 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. Leroy Stewart Thomson III received $3,469 in industry payments from 2016 to 2025
CMS Open Payments shows 15 general payments to Dr. Thomson from 9 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 93% of the total. Baxter Healthcare paid the most, $2,490.
General payments to Dr. Thomson by program year, 2016 to 2025
General payments to Dr. Thomson by kind, 2016 to 2025
- Consulting fees$3,24093%
- Food and beverage$2297%
Companies that paid Dr. Thomson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Leroy Stewart Thomson III'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| 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. Leroy Stewart Thomson III
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. Leroy Stewart Thomson III's NPI number?
Dr. Leroy Stewart Thomson III's NPI number is 1477651750. It was assigned on September 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Leroy Stewart Thomson III?
Dr. Leroy Stewart Thomson III is an anesthesiologist in Barrington, Illinois. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Leroy Stewart Thomson III practice?
Dr. Thomson practices at 450 West Highway 22, Barrington, IL 60010. Dr. Thomson's primary practice is Advocate Good Shepherd Hospital in Barrington, Illinois, part of Advocate Health.
What is Dr. Leroy Stewart Thomson III's office phone number?
The practice phone on file for Dr. Thomson is (847) 381-9600.
What is Dr. Leroy Stewart Thomson III's medical license number?
Dr. Thomson holds Illinois license 036.119201, one of the licenses on file in 2 states.
Which states has Dr. Leroy Stewart Thomson III been licensed in?
Dmand AI has state licenses on file for Dr. Thomson in Illinois and Arizona.
Which hospitals is Dr. Leroy Stewart Thomson III affiliated with?
Dr. Thomson practices at Advocate Good Shepherd Hospital in Barrington, Illinois.
What medical group is Dr. Leroy Stewart Thomson III part of?
Dr. Thomson is linked to Barrington Anesthesia Associates.
Does Dr. Leroy Stewart Thomson III accept Medicare?
Yes. CMS data shows Dr. Thomson billed Medicare for 158 services in 2024, and Dr. Thomson accepts Medicare assignment.
How many Medicare patients does Dr. Leroy Stewart Thomson III see?
CMS counts 252 Medicare patients who saw Dr. Thomson in 2024, with an average age of 75.
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What services does Dr. Leroy Stewart Thomson III bill to Medicare?
In 2024, Dr. Thomson's most billed Medicare services were anesthesia (00731), anesthesia (00811) and anesthesia (00812).
Has Dr. Leroy Stewart Thomson III received payments from drug or device companies?
CMS Open Payments shows $3,469 in general payments to Dr. Thomson from 9 companies from 2016 to 2025. The largest total came from Baxter Healthcare.
How long has Dr. Leroy Stewart Thomson III been practicing?
Dr. Thomson graduated from medical school in 2002, 24 years ago.
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