Tammy L. Johnsen, NP
- Medicare patients, 2024
- 99
- Part D claims, 2024
- 499
- Hospital affiliations
- 2
- Industry payments
- $226
- Medical group
- 1
- Practice address
- N17w24100 Riverwood Dr, Waukesha, WI 53188
- Practice phone
- Call (262) 928-4100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Prohealth Medical Group Inc
Waukesha, Wisconsin
Find Tammy Johnsen'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.
Tammy L. Johnsen is a nurse practitioner in Waukesha, Wisconsin
Tammy Johnsen practices at Prohealth Medical Group Inc in Waukesha, Wisconsin.
Tammy Johnsen's NPI, 1073713913, was assigned on July 19, 2007. Tammy Johnsen holds Wisconsin license 7504.
- NPI
- 1073713913NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759477821
- NPI enumeration date
- July 19, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (262) 928-4100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Tammy L. Johnsen practices at Prohealth Medical Group Inc in Waukesha, Wisconsin
Tammy Johnsen's primary practice is Prohealth Medical Group Inc, at N17w24100 Riverwood Dr, Waukesha, WI 53188 in Waukesha County. The practice phone is (262) 928-4100.
- Prohealth Medical Group IncN17w24100 Riverwood Dr, Waukesha, WI 53188 · Waukesha CountyPhone(262) 928-4100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Tammy L. Johnsen is affiliated with 4 sites of care and 1 medical group
Tammy Johnsen's primary practice is Prohealth Medical Group Inc in Waukesha, Wisconsin. Tammy Johnsen is also affiliated with ProHealth Waukesha Memorial Hospital. The medical group on file is ProHealth Medical Group. Dmand AI also links Tammy Johnsen to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Tammy L. Johnsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tammy Johnsen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Prohealth Medical Group Inc | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Tammy L. Johnsen is one of 3,198 nurse practitioners in Wisconsin
Nurse practitioner is Tammy Johnsen's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Dmand AI has Tammy Johnsen's licenses on file in 2 states: Wisconsin and Illinois.
Specialties and state licenses
- Nurse practitioner, WisconsinPrimary
- Illinois license
Nurse practitioners near Tammy Johnsen
Counts of nurse practitioners 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
Tammy L. Johnsen treated 99 Medicare patients in 2024, average age 78
CMS counts 99 Medicare patients who saw Tammy Johnsen in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 2.02, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Tammy Johnsen's median patient age at 76, with 47% women.
Tammy Johnsen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Tammy Johnsen's Medicare patients by sex, 2024
- Women4646%
- Men5354%
Chronic conditions among Tammy Johnsen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease72%
- Atrial fibrillation62%
- Chronic kidney disease54%
- Heart failure48%
- Arthritis45%
- Diabetes29%
Share of Medicare patients with each condition. A patient can have several.
Tammy Johnsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Tammy L. Johnsen wrote 499 Medicare Part D claims in 2024
In 2024, Tammy Johnsen wrote 499 Medicare Part D claims for 118 patients. 85% of them were for generic drugs.
Tammy Johnsen's Part D claims by kind of drug, 2024
- Generic423 claims85%
- Brand-name76 claims15%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Tammy L. Johnsen takes part in Medicare
Tammy Johnsen 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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Tammy L. Johnsen received $226 in industry payments in 2025
CMS Open Payments shows 2 general payments to Tammy Johnsen from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $122.
Companies that paid Tammy Johnsen 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 Tammy L. Johnsen'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 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 Tammy L. Johnsen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tammy L. Johnsen's NPI number?
Tammy L. Johnsen's NPI number is 1073713913. It was assigned on July 19, 2007, and it is active in the NPI Registry.
What does Tammy L. Johnsen specialize in?
Tammy L. Johnsen is a nurse practitioner in Waukesha, Wisconsin. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Tammy L. Johnsen practice?
Tammy Johnsen practices at N17w24100 Riverwood Dr, Waukesha, WI 53188. Tammy Johnsen's primary practice is Prohealth Medical Group Inc in Waukesha, Wisconsin. Dmand AI also links Tammy Johnsen to 1 hospital and 1 group practice or clinic.
What is Tammy L. Johnsen's office phone number?
The practice phone on file for Tammy Johnsen is (262) 928-4100.
What is Tammy L. Johnsen's medical license number?
Tammy Johnsen holds Wisconsin license 7504, one of the licenses on file in 2 states.
Which states has Tammy L. Johnsen been licensed in?
Dmand AI has state licenses on file for Tammy Johnsen in Wisconsin and Illinois.
Which hospitals is Tammy L. Johnsen affiliated with?
Tammy Johnsen is affiliated with ProHealth Waukesha Memorial Hospital. Dmand AI links Tammy Johnsen to 1 more hospital.
What medical group is Tammy L. Johnsen part of?
Tammy Johnsen is linked to ProHealth Medical Group.
Does Tammy L. Johnsen accept Medicare?
Yes. CMS lists Tammy Johnsen as accepting Medicare assignment.
How many Medicare patients does Tammy L. Johnsen see?
CMS counts 99 Medicare patients who saw Tammy Johnsen in 2024, with an average age of 78.
Has Tammy L. Johnsen received payments from drug or device companies?
CMS Open Payments shows $226 in general payments to Tammy Johnsen from 2 companies from 2025 to 2025. The largest total came from Amgen Inc.
How long has Tammy L. Johnsen been practicing?
Tammy Johnsen graduated from medical school in 2003, 23 years ago.
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