Gregory Louis Johnson
- Medicare patients, 2024
- 67
- Part D claims, 2024
- 1,782
- Hospital affiliations
- 2
- Industry payments
- $75
- Medical group
- 1
- Practice address
- 8901 W Lincoln Ave, West Allis, WI 53227
- Practice phone
- Call (414) 328-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Gregory Johnson'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.
Gregory Louis Johnson is a physician assistant in Milwaukee, Wisconsin
Gregory Johnson practices at Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health.
Gregory Johnson's NPI, 1568080505, was assigned on July 7, 2020. Gregory Johnson holds Wisconsin license 7020.
- NPI
- 1568080505NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183000680
- NPI enumeration date
- July 7, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (414) 328-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gregory Louis Johnson practices at Aurora West Allis Medical Center in West Allis, Wisconsin
Gregory Johnson's primary practice is Aurora West Allis Medical Center, at 8901 W Lincoln Ave, West Allis, WI 53227 in Milwaukee County. The practice phone is (414) 328-6000.
- Aurora West Allis Medical Center8901 W Lincoln Ave, West Allis, WI 53227 · Milwaukee CountyPhone(414) 328-6000
Source: Dmand AI Affiliation Data
Gregory Louis Johnson is affiliated with 4 sites of care and 1 medical group
Gregory Johnson's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Gregory Johnson is also affiliated with Aurora Medical Center - Oshkosh. The medical group on file is Aurora Medical Group. Dmand AI also links Gregory Johnson to 1 more group practice or clinic and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gregory Louis Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gregory Johnson practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aurora West Allis Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Advocate Health and 6.2K+ hospitals, with verified contacts in the same login.
Gregory Louis Johnson is one of 3,127 physician assistants in Wisconsin
Physician assistant is Gregory Johnson's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Gregory Johnson is licensed in Wisconsin.
Specialties and state licenses
- Physician assistant, WisconsinPrimary
Physician assistants near Gregory Johnson
Counts of physician assistants 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
Gregory Louis Johnson treated 67 Medicare patients in 2024, average age 67
CMS counts 67 Medicare patients who saw Gregory Johnson in 2024. The largest group is under 65, with 26 patients. 75% of them have arthritis, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.46, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gregory Johnson's median patient age at 60, with 72% women.
Gregory Johnson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gregory Johnson's Medicare patients by sex, 2024
- Women5481%
- Men1319%
Chronic conditions among Gregory Johnson's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure72%
- Mood disorders49%
- Anxiety48%
- Depression43%
- Chronic kidney disease40%
- Diabetes39%
Share of Medicare patients with each condition. A patient can have several.
Gregory 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 60
Patient panel by sex, all payers
- Women72%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gregory Louis Johnson wrote 1,782 Medicare Part D claims in 2024
In 2024, Gregory Johnson wrote 1,782 Medicare Part D claims for 238 patients. 99% of them were for generic drugs.
Gregory Johnson's Part D claims by kind of drug, 2024
- Generic1,769 claims99%
- Brand-name13 claims1%
Drug classes CMS tracks in Gregory Johnson's Part D claims, 2024
- Opioids28%493 of 1,782 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gregory Louis Johnson takes part in Medicare
Gregory Johnson 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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Gregory Louis Johnson received $75 in industry payments in 2025
CMS Open Payments shows 1 general payment to Gregory Johnson from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. SPR Therapeutics, Inc paid the most, $75.
Companies that paid Gregory Johnson the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Gregory Louis 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 | 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Gregory Louis 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 Gregory Louis Johnson's NPI number?
Gregory Louis Johnson's NPI number is 1568080505. It was assigned on July 7, 2020, and it is active in the NPI Registry.
What does Gregory Louis Johnson specialize in?
Gregory Louis Johnson is a physician assistant in Milwaukee, Wisconsin. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Gregory Louis Johnson practice?
Gregory Johnson practices at 8901 W Lincoln Ave, West Allis, WI 53227. Gregory Johnson's primary practice is Aurora West Allis Medical Center in West Allis, Wisconsin, part of Advocate Health. Dmand AI also links Gregory Johnson to 1 group practice or clinic and 1 hospital outpatient department.
What is Gregory Louis Johnson's office phone number?
The practice phone on file for Gregory Johnson is (414) 328-6000.
What is Gregory Louis Johnson's medical license number?
Gregory Johnson holds Wisconsin license 7020.
Which hospitals is Gregory Louis Johnson affiliated with?
Gregory Johnson practices at Aurora West Allis Medical Center in West Allis, Wisconsin. Gregory Johnson is also affiliated with Aurora Medical Center - Oshkosh.
What medical group is Gregory Louis Johnson part of?
Gregory Johnson is linked to Aurora Medical Group.
Does Gregory Louis Johnson accept Medicare?
Yes. CMS lists Gregory Johnson as accepting Medicare assignment.
How many Medicare patients does Gregory Louis Johnson see?
CMS counts 67 Medicare patients who saw Gregory Johnson in 2024, with an average age of 67.
Has Gregory Louis Johnson received payments from drug or device companies?
CMS Open Payments shows $75 in general payments to Gregory Johnson from 1 company from 2025 to 2025. The largest total came from SPR Therapeutics, Inc.
How long has Gregory Louis Johnson been practicing?
Gregory Johnson graduated from medical school in 2022, 4 years ago.
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