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
- Entity
- Type 1 · individual
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 1,010 among the 32,287 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 Medicare quality score for 2023: 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).
One hospital or facility affiliation
- Central Dupage Physician GroupSycamore, IL
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Psychiatry Physician providers in Illinois
There are 2,003 psychiatry physician records in Illinois.
Other psychiatry physician records in Illinois
- Alexandra Aaronson, M.D.Chicago, IL1881937928
- Anthony Abadir, MDOak Park, IL1295312551
- Jeff Abbott, M.D.Chicago, IL1265887509
- Kathryn AbbottChicago, IL1295537561
- Gil Abelita, MDBloomington, IL1619986551
- Dinuk Abeysekera, M.D.North Chicago, IL1366616534
- Patrick Abler, DOSpringfield, IL1770158537
- Jenny Abraham, APNDowners Grove, IL1396322392
- Rohit Abraham, MD, MPH, MATChicago, IL1013478932
- Constantin Abuzatoaie, M.D.Hoffman Estates, IL1477817062
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 1,010. Part D covers Medicare prescriptions only.
What is Thomas Dennison, M.D.'s Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.