Jt Comm J Qual Patient Saf
Hospitals, UrbanLength of StayQuality Improvement
Dr. Thomas D. MacKenzie, MD
NPI1821007741PAC ID9234123589
- Part D claims, 2024
- 166
- Publications
- 12
- Hospital affiliations
- 1
- Industry payments
- $20
- Medical group
- 1
- Practice address
- 777 Bannock St, Denver, CO 80204
- Practice phone
- Call (303) 602-4935
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Thomas D. MacKenzie is an internist in Denver, Colorado
Dr. MacKenzie practices at Denver Health Medical Center in Denver, Colorado, part of Denver Health and Hospital Authority.
Dr. MacKenzie's NPI, 1821007741, was assigned on August 7, 2006. Dr. MacKenzie graduated from Washington University School of Medicine in 1989. Dr. MacKenzie holds Colorado license 30983.
NPI and contact details
- NPI
- 1821007741NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234123589
- NPI enumeration date
- August 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (303) 602-4935
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas D. MacKenzie practices at Denver Health Medical Center in Denver, Colorado
Dr. MacKenzie's primary practice is Denver Health Medical Center, at 777 Bannock St, Denver, CO 80204 in Denver County. The practice phone is (303) 602-4935.
- Denver Health Medical Center777 Bannock St, Denver, CO 80204 · Denver CountyPhone(303) 602-4935
Source: Dmand AI Affiliation Data
Dr. Thomas D. MacKenzie is affiliated with 1 site of care and 1 medical group
Dr. MacKenzie's primary practice is Denver Health Medical Center in Denver, Colorado, part of Denver Health and Hospital Authority. The medical group on file is Denver Health. Dr. MacKenzie's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas D. MacKenzie's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. MacKenzie practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Denver Health Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas D. MacKenzie is one of 1,668 internists in Colorado
Internal medicine is Dr. MacKenzie's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. MacKenzie is licensed in Colorado.
Specialties and state licenses
- Internal medicine, ColoradoPrimary
Internists near Dr. MacKenzie
Counts of internists 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 D. MacKenzie's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Dr. MacKenzie's median patient age at 54, with 36% women.
Dr. MacKenzie's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women36%
- Men64%
Source: Dmand AI Patient Panel Data
Dr. Thomas D. MacKenzie wrote 166 Medicare Part D claims in 2024
In 2024, Dr. MacKenzie wrote 166 Medicare Part D claims for 29 patients. 80% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $34 in total drug cost. In 2023, CMS named 22 claims across 2 drugs.
Part D claims, 2024166
Drugs named by CMS1
Total drug cost$34
Part D patients29
Dr. MacKenzie's Part D claims by kind of drug, 2024
- Generic133 claims80%
- Brand-name and other33 claims20%
Dr. MacKenzie'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: 222024: 1818%
Drugs named by CMS: 1 in 2024, 2 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. Thomas D. MacKenzie takes part in Medicare
Dr. MacKenzie 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. Thomas D. MacKenzie has 12 publications on record
Dmand AI links 12 papers to Dr. MacKenzie, published from 2011 to 2025. 2012 was the busiest year, with 2. The most frequent topics are Colorado, Cost-Benefit Analysis and Diabetes Mellitus. Dr. MacKenzie has published most often in Am J Manag Care. Dr. MacKenzie's most frequent co-authors are William Chandler Cushman, MD, Henry H. Fischer, MD and Raymond O. Estacio, MD.
Papers12
Years published2011 to 2025
Dr. MacKenzie's papers by year, 2011 to 2025
Topics Dr. MacKenzie writes about most
- Colorado
- Cost-Benefit Analysis
- Diabetes Mellitus
- Hospitals, Urban
- Length of Stay
- Medically Uninsured
- Organizational Case Studies
- Quality Improvement
Dr. MacKenzie's most frequent co-authors
- William Chandler Cushman, MD3 shared papers
- Henry H. Fischer, MD3 shared papers
- Raymond O. Estacio, MD2 shared papers
Recent publications by Dr. MacKenzie
See who Dr. MacKenzie researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. MacKenzie works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas D. MacKenzie received $20 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. MacKenzie from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Ethicon Inc. paid the most, $20.
Companies that paid Dr. MacKenzie the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas D. MacKenzie graduated from Washington University School of Medicine
Dr. MacKenzie graduated from Washington University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas D. MacKenzie'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 D. MacKenzie
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 D. MacKenzie's NPI number?
Dr. Thomas D. MacKenzie's NPI number is 1821007741. It was assigned on August 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas D. MacKenzie?
Dr. Thomas D. MacKenzie is an internist in Denver, Colorado. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas D. MacKenzie practice?
Dr. MacKenzie practices at 777 Bannock St, Denver, CO 80204. Dr. MacKenzie's primary practice is Denver Health Medical Center in Denver, Colorado, part of Denver Health and Hospital Authority.
What is Dr. Thomas D. MacKenzie's office phone number?
The practice phone on file for Dr. MacKenzie is (303) 602-4935.
What is Dr. Thomas D. MacKenzie's medical license number?
Dr. MacKenzie holds Colorado license 30983.
Which hospitals is Dr. Thomas D. MacKenzie affiliated with?
Dr. MacKenzie practices at Denver Health Medical Center in Denver, Colorado.
What medical group is Dr. Thomas D. MacKenzie part of?
Dr. MacKenzie is linked to Denver Health.
Does Dr. Thomas D. MacKenzie accept Medicare?
Yes. CMS lists Dr. MacKenzie as accepting Medicare assignment.
Where did Dr. Thomas D. MacKenzie go to medical school?
Dr. MacKenzie graduated from Washington University School of Medicine in 1989.
What drugs does Dr. Thomas D. MacKenzie prescribe most?
In 2024 Medicare Part D data, Dr. MacKenzie's most prescribed drugs by claims were Atorvastatin Calcium.
Show 4 more questionsShow fewer questions
Has Dr. Thomas D. MacKenzie received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. MacKenzie from 1 company from 2022 to 2022. The largest total came from Ethicon Inc.
How long has Dr. Thomas D. MacKenzie been practicing?
Dr. MacKenzie graduated from medical school in 1989, 37 years ago.
Does Dr. Thomas D. MacKenzie do research?
Dmand AI links 12 publications to Dr. MacKenzie, published from 2011 to 2025.
Who does Dr. Thomas D. MacKenzie publish with?
Dr. MacKenzie's most frequent co-authors are William Chandler Cushman, MD (3 shared papers), Henry H. Fischer, MD (3 shared papers) and Raymond O. Estacio, MD (2 shared papers).
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