Dr. Thomas Dennison, MD
- Medicare services, 2024
- 228
- Medicare patients, 2024
- 75
- Part D claims, 2024
- 4,644
- MIPS score, 2024
- 96
- Hospital affiliations
- 2
- Practice address
- One Kish Hospital Drive, Dekalb, IL 60115
- Practice phone
- Call (815) 756-1521
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Dennison'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. Thomas Dennison is a psychiatrist in Dekalb, Illinois
Dr. Dennison practices at Northwestern Medicine Kishwaukee Hospital in Dekalb, Illinois, part of Northwestern Memorial HealthCare.
Dr. Dennison's NPI, 1588673719, was assigned on August 5, 2006. Dr. Dennison graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1981. Dr. Dennison holds Illinois license 036-065089.
- NPI
- 1588673719NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8729987276
- NPI enumeration date
- August 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (815) 756-1521
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Dennison practices at 2 locations in Dekalb, Illinois
Dr. Dennison's primary practice is Northwestern Medicine Kishwaukee Hospital, at One Kish Hospital Drive, Dekalb, IL 60115 in De Kalb County. The practice phone is (815) 756-1521. Dr. Dennison also practices at Northwestern Medicine Kishwaukee Hospital, 1 Kish Hospital Dr, Dekalb, IL 60115.
- Northwestern Medicine Kishwaukee HospitalPrimaryOne Kish Hospital Drive, Dekalb, IL 60115 · De Kalb CountyPhone(815) 756-1521
- Northwestern Medicine Kishwaukee Hospital1 Kish Hospital Dr, Dekalb, IL 60115 · Dekalb CountyPhone(815) 756-1521
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Thomas Dennison is affiliated with 3 sites of care and 2 medical groups
Dr. Dennison's primary practice is Northwestern Medicine Kishwaukee Hospital in Dekalb, Illinois, part of Northwestern Memorial HealthCare. Dr. Dennison is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Northwestern Medicine Regional Medical Group. Dmand AI also links Dr. Dennison to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas Dennison's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Dennison practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Kishwaukee Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Dennison is one of 1,527 psychiatrists in Illinois
Psychiatry is Dr. Dennison's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Dennison is licensed in Illinois.
Specialties and state licenses
- Psychiatry, IllinoisPrimary
Psychiatrists near Dr. Dennison
Counts of psychiatrists 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. Thomas Dennison billed Medicare for 228 services in 2024
CMS data shows 228 Medicare services from Dr. Dennison across 1 procedure code in 2024, all of them office visits, for 75 Medicare patients. Medicare paid $14,200 for them. Every service was in an office.
Dr. Dennison's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4002024: 22843%
Dr. Dennison compared with the Illinois median for psychiatrists, 2024
- Dr. Dennison
- Illinois median
- Medicare services
- 228vs 20312% above
- Medicare patients
- 75vs 6319% above
- Part D claims
- 4,515vs 17425.9 times
Medians across 1,588 psychiatrists in Illinois with Dmand AI profiles that report each measure.
Dr. Dennison'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. Dennison and other psychiatrists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Dennison treated 75 Medicare patients in 2024, average age 68
CMS counts 75 Medicare patients who saw Dr. Dennison in 2024. The largest group is 65 to 74, with 38 patients. 75% of them have anxiety, and 75% have mood disorders. 27% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Dennison's median patient age at 58, with 62% women.
Dr. Dennison's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Dennison's Medicare patients by sex, 2024
- Women5877%
- Men1723%
Chronic conditions among Dr. Dennison's Medicare patients, 2024
- Anxiety75%
- Mood disorders75%
- High cholesterol68%
- Depression65%
- High blood pressure64%
- Arthritis48%
- Bipolar disorder33%
- Chronic kidney disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Dennison's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Dennison wrote 4,644 Medicare Part D claims in 2024
In 2024, Dr. Dennison wrote 4,644 Medicare Part D claims for 292 patients. 97% of them were for generic drugs. CMS names the drug for 4,515 of them, across 62 drugs with 11 or more claims each, at $163,564 in total drug cost. In 2023, CMS named 4,502 claims across 65 drugs.
Dr. Dennison's Part D claims by kind of drug, 2024
- Generic4,485 claims97%
- Brand-name159 claims3%
Dr. Dennison'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.
Drug classes CMS tracks in Dr. Dennison's Part D claims, 2024
- Antipsychotics, patients 65 and over8%368 of 4,644 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,5022024: 4,515No change
Drugs named by CMS: 62 in 2024, 65 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
Dr. Thomas Dennison scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Dennison for performance year 2024, reported through an alternative payment model (APM). Dr. Dennison accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Dennison as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Dennison's MIPS scores, performance year 2024
- 96of 100Final score
- 88.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Thomas Dennison received $572 in industry payments from 2016 to 2019
CMS Open Payments shows 32 general payments to Dr. Dennison from 4 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $312.
General payments to Dr. Dennison by program year, 2016 to 2019
Companies that paid Dr. Dennison the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Dennison graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Dennison graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Dennison'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 Affiliation DataDmand AI Practice 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) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Thomas Dennison
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. Thomas Dennison's NPI number?
Dr. Thomas Dennison's NPI number is 1588673719. It was assigned on August 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Dennison?
Dr. Thomas Dennison is a psychiatrist in Dekalb, Illinois. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Thomas Dennison practice?
Dr. Dennison practices at One Kish Hospital Drive, Dekalb, IL 60115. Dr. Dennison also practices at 1 Kish Hospital Dr, Dekalb, IL 60115. Dr. Dennison's primary practice is Northwestern Medicine Kishwaukee Hospital in Dekalb, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Dennison to 1 group practice or clinic and 1 medical group.
What is Dr. Thomas Dennison's office phone number?
The practice phone on file for Dr. Dennison is (815) 756-1521.
What is Dr. Thomas Dennison's medical license number?
Dr. Dennison holds Illinois license 036-065089.
Which hospitals is Dr. Thomas Dennison affiliated with?
Dr. Dennison practices at Northwestern Medicine Kishwaukee Hospital in Dekalb, Illinois. Dr. Dennison is also affiliated with Northwestern Medicine Central DuPage Hospital.
What medical group is Dr. Thomas Dennison part of?
Dr. Dennison is linked to Northwestern Medicine Regional Medical Group. Dmand AI links Dr. Dennison to 1 more medical group.
Does Dr. Thomas Dennison accept Medicare?
Yes. CMS data shows Dr. Dennison billed Medicare for 228 services in 2024, and Dr. Dennison accepts Medicare assignment.
Does Dr. Thomas Dennison offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Dennison as offering telehealth services.
What is Dr. Thomas Dennison's MIPS score?
Dr. Dennison's MIPS final score for performance year 2024 is 96 out of 100, reported through an alternative payment model (APM).
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Thomas Dennison see?
CMS counts 75 Medicare patients who saw Dr. Dennison in 2024, with an average age of 68.
What services does Dr. Thomas Dennison bill to Medicare?
In 2024, Dr. Dennison's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Thomas Dennison go to medical school?
Dr. Dennison graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1981.
What drugs does Dr. Thomas Dennison prescribe most?
In 2024 Medicare Part D data, Dr. Dennison's most prescribed drugs by claims were Alprazolam, Buspirone HCl and Sertraline HCl.
Has Dr. Thomas Dennison received payments from drug or device companies?
CMS Open Payments shows $572 in general payments to Dr. Dennison from 4 companies from 2016 to 2019. The largest total came from Allergan Inc.
How long has Dr. Thomas Dennison been practicing?
Dr. Dennison graduated from medical school in 1981, 45 years ago.
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