Dr. Thomas A. Johnson, MD
- Medicare services, 2024
- 1,188
- Medicare patients, 2024
- 370
- Part D claims, 2024
- 13,139
- MIPS score, 2024
- 75
- Hospital affiliations
- 4
- Practice address
- 400 W River Woods Pkwy, Milwaukee, WI 53212
- Practice phone
- Call (414) 465-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ascension Medical Group
Milwaukee, Wisconsin
Find Dr. Johnson's professional email, personal email and mobile number
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Dr. Thomas A. Johnson is an internist in Milwaukee, Wisconsin
Dr. Johnson practices at Ascension Medical Group in Milwaukee, Wisconsin.
Dr. Johnson's NPI, 1891762852, was assigned on March 8, 2006. Dr. Johnson graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1976. Dr. Johnson holds Wisconsin license 26997.
- NPI
- 1891762852NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436041100
- NPI enumeration date
- March 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (414) 465-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas A. Johnson practices at Ascension Medical Group in Milwaukee, Wisconsin
Dr. Johnson's primary practice is Ascension Medical Group, at 400 W River Woods Pkwy, Milwaukee, WI 53212 in Milwaukee County. The practice phone is (414) 465-3000.
- Ascension Medical Group400 W River Woods Pkwy, Milwaukee, WI 53212 · Milwaukee CountyPhone(414) 465-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas A. Johnson is affiliated with 8 sites of care and 2 medical groups
Dr. Johnson's primary practice is Ascension Medical Group in Milwaukee, Wisconsin. Dr. Johnson is also affiliated with Froedtert Hospital. The medical group on file is Ascension Medical Group. Dmand AI also links Dr. Johnson to 3 more hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas A. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Medical Group | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas A. Johnson is one of 1,675 internists in Wisconsin
Internal medicine is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Johnson is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Johnson
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 A. Johnson billed Medicare for 1,188 services in 2024
CMS data shows 1,188 Medicare services from Dr. Johnson across 11 procedure codes in 2024, for 370 Medicare patients. Medicare paid $103,305 for them. Every service was in an office.
Dr. Johnson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6902024: 6348%
- Other services
- 2023: 5522024: 38031%
- Tests and treatments
- 2023: 3012024: 14950%
- Imaging
- 2023: 192024: 1332%
- Surgery
- 2023: 172024: 1229%
Dr. Johnson compared with the Wisconsin median for internists, 2024
- Dr. Johnson
- Wisconsin median
- Medicare services
- 1,188vs 4572.6 times
- Medicare patients
- 370vs 19986% above
- Part D claims
- 12,455vs 43328.8 times
Medians across 1,658 internists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Johnson'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. Johnson and other internists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas A. Johnson treated 370 Medicare patients in 2024, average age 78
CMS counts 370 Medicare patients who saw Dr. Johnson in 2024. The largest group is 75 to 84, with 169 patients. 75% of them have high blood pressure, and 69% have high cholesterol. Their average risk score is 0.90, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 77, with 52% women.
Dr. Johnson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Johnson's Medicare patients by sex, 2024
- Women19653%
- Men17447%
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol69%
- Arthritis41%
- Ischemic heart disease28%
- Atrial fibrillation19%
- Diabetes19%
- Cancer16%
- Anxiety14%
Share of Medicare patients with each condition. A patient can have several.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas A. Johnson wrote 13,139 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 13,139 Medicare Part D claims for 1,131 patients. 88% of them were for generic drugs. CMS names the drug for 12,455 of them, across 154 drugs with 11 or more claims each, at $892,266 in total drug cost. In 2023, CMS named 11,752 claims across 139 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic11,529 claims88%
- Brand-name1,553 claims12%
- Other57 claims0%
Dr. Johnson'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. Johnson's Part D claims, 2024
- Opioids2%327 of 13,139 claims
- Antibiotics2%219 of 13,139 claims
- Antipsychotics, patients 65 and over0%30 of 13,139 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: 11,7522024: 12,4556%
Drugs named by CMS: 154 in 2024, 139 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 A. Johnson scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Johnson for performance year 2024, reported through an alternative payment model (APM). Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
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 A. Johnson received $5,146 in industry payments from 2016 to 2025
CMS Open Payments shows 301 general payments to Dr. Johnson from 35 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $563.
General payments to Dr. Johnson by program year, 2016 to 2025
General payments to Dr. Johnson by kind, 2016 to 2025
- Food and beverage$5,130100%
- Education$160%
Companies that paid Dr. Johnson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas A. Johnson graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Johnson graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1976.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas A. Johnson'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 A. Johnson
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 A. Johnson's NPI number?
Dr. Thomas A. Johnson's NPI number is 1891762852. It was assigned on March 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas A. Johnson?
Dr. Thomas A. Johnson is an internist in Milwaukee, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas A. Johnson practice?
Dr. Johnson practices at 400 W River Woods Pkwy, Milwaukee, WI 53212. Dr. Johnson's primary practice is Ascension Medical Group in Milwaukee, Wisconsin. Dmand AI also links Dr. Johnson to 3 hospitals, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Thomas A. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (414) 465-3000.
What is Dr. Thomas A. Johnson's medical license number?
Dr. Johnson holds Wisconsin license 26997.
Which hospitals is Dr. Thomas A. Johnson affiliated with?
Dr. Johnson is affiliated with Froedtert Hospital. Dmand AI links Dr. Johnson to 3 more hospitals.
What medical group is Dr. Thomas A. Johnson part of?
Dr. Johnson is linked to Ascension Medical Group. Dmand AI links Dr. Johnson to 1 more medical group.
Does Dr. Thomas A. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 1,188 services in 2024, and Dr. Johnson accepts Medicare assignment.
What is Dr. Thomas A. Johnson's MIPS score?
Dr. Johnson's MIPS final score for performance year 2024 is 75 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Thomas A. Johnson see?
CMS counts 370 Medicare patients who saw Dr. Johnson in 2024, with an average age of 78.
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What services does Dr. Thomas A. Johnson bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Thomas A. Johnson go to medical school?
Dr. Johnson graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1976.
What drugs does Dr. Thomas A. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Atorvastatin Calcium, Irbesartan and Amlodipine Besylate.
Has Dr. Thomas A. Johnson received payments from drug or device companies?
CMS Open Payments shows $5,146 in general payments to Dr. Johnson from 35 companies from 2016 to 2025. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Thomas A. Johnson been practicing?
Dr. Johnson graduated from medical school in 1976, 50 years ago.
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