Thomas Dennison, M.D.
Psychiatry Physician · Sycamore, IL
Thomas Dennison, M.D. is a psychiatry physician with a practice address in Sycamore, Illinois, and NPI 1588673719, issued on Aug 5, 2006. Check the license (Illinois 036-065089, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Thomas Dennison
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 036-065089 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1850 Gateway Dr, Sycamore, IL 60178
- Phone
- (815) 758-8671
- Enumerated
- Aug 5, 2006
- Record last updated
- Sep 10, 2012 (not updated in 14 years: call before relying on the address or phone)
- Medicaid ID
- 036065089 IL
- Medicare enrollment
- Enrolled (PECOS I20040105000473); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1981
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,147 in Illinois → Look up another NPI →
Also registered at 1850 Gateway Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Dennison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-065089Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.6 times the Medicare Part D claims of the average psychiatry physician in 2024
4,644 Medicare Part D claims for 292 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Alprazolam337 claims
- Buspirone Hcl260 claims
- Sertraline Hcl235 claims
- Trazodone Hcl232 claims
- Lamotrigine226 claims
- Quetiapine Fumarate210 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Central Dupage Physician GroupSycamore, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Dennison among 2,147 psychiatry physician records in Illinois
Thomas Dennison, M.D. is one of 2,147 psychiatry physician records with a practice address in Illinois. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 65% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Graduated1981 · median 2004 among the 877 with a school on file
- Record last updated2012 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Illinois
There are 2,147 psychiatry physician records in Illinois.
All 2,147 in Illinois → Every provider in Sycamore → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Mark Fischer, M.D.Sycamore, IL 601781073870366
- Mardjan Foroutan, MDSycamore, IL 601781619900024
- Thomas Kirts, M.D.Sycamore, IL 601781376552505
- Chad Schusler, DNP PMHNPSouth Elgin, IL 601771407694490
- Charles Burda, MDOakbrook Terrace, IL 601811144329764
- Amin Daghestani, MDOakbrook Terrace, IL 601811770683351
- Mazhar Golewale, MDOakbrook Terrace, IL 601811104048446
- Mitchell Halper, MDSt Charles, IL 601751205039658
Common questions
What is Thomas Dennison, M.D.'s NPI number?
Thomas Dennison, M.D.'s National Provider Identifier (NPI) is 1588673719, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Dennison, M.D. located?
The NPPES record lists a practice address at 1850 Gateway Dr, Sycamore, IL, 60178. Phone: (815) 758-8671. Providers update this record themselves, so call before visiting.
How can I verify Thomas Dennison, M.D.'s license?
NPPES lists Illinois license number 036-065089, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Dennison, M.D. prescribe under Medicare Part D?
In 2024, Thomas Dennison, M.D. had 4,644 Medicare Part D claims for 292 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Thomas Dennison, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.