Alwin A. Diaz, NP
- Medicare patients, 2024
- 45
- Part D claims, 2024
- 3,754
- Industry payments
- $18
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 217 Wisconsin Ave, Waukesha, WI 53186
- Practice phone
- Call (414) 376-5577
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Horizon Healthcare, Inc
Waukesha, Wisconsin
Find Alwin Diaz'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.
Alwin A. Diaz is a nurse practitioner in Waukesha, Wisconsin
Alwin Diaz practices at Horizon Healthcare, Inc in Waukesha, Wisconsin.
Alwin Diaz's NPI, 1245610658, was assigned on June 2, 2015. Alwin Diaz holds Wisconsin license 6367-33.
- NPI
- 1245610658NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022329085
- NPI enumeration date
- June 2, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (414) 376-5577
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Alwin A. Diaz practices at Horizon Healthcare, Inc in Waukesha, Wisconsin
Alwin Diaz's primary practice is Horizon Healthcare, Inc, at 217 Wisconsin Ave, Waukesha, WI 53186 in Waukesha County. The practice phone is (414) 376-5577.
- Horizon Healthcare, Inc217 Wisconsin Ave, Waukesha, WI 53186 · Waukesha CountyPhone(414) 376-5577
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Alwin A. Diaz is affiliated with 2 sites of care and 2 medical groups
Alwin Diaz's primary practice is Horizon Healthcare, Inc in Waukesha, Wisconsin. The medical group on file is Horizon Healthcare, Inc. Dmand AI also links Alwin Diaz to 1 more group practice or clinic and 1 medical group, 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 Alwin A. Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Alwin Diaz practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Horizon Healthcare, Inc | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Alwin A. Diaz is one of 3,198 nurse practitioners in Wisconsin
Nurse practitioner is Alwin Diaz's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Alwin Diaz is licensed in Wisconsin.
Specialties and state licenses
- Nurse practitioner, WisconsinPrimary
Nurse practitioners near Alwin Diaz
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
Alwin A. Diaz treated 45 Medicare patients in 2024, average age 51
CMS counts 45 Medicare patients who saw Alwin Diaz in 2024. 75% of them have anxiety, and 71% have mood disorders. Their average risk score is 1.34, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Alwin Diaz's median patient age at 42, with 55% women.
Alwin Diaz's Medicare patients by sex, 2024
- Women1840%
- Men2760%
Chronic conditions among Alwin Diaz's Medicare patients, 2024
- Anxiety75%
- Mood disorders71%
- Depression58%
- High blood pressure53%
- Schizophrenia and other psychoses44%
- Bipolar disorder40%
- High cholesterol40%
- Tobacco use33%
Share of Medicare patients with each condition. A patient can have several.
Alwin Diaz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Alwin A. Diaz wrote 3,754 Medicare Part D claims in 2024
In 2024, Alwin Diaz wrote 3,754 Medicare Part D claims for 141 patients. 90% of them were for generic drugs.
Alwin Diaz's Part D claims by kind of drug, 2024
- Generic3,369 claims90%
- Brand-name385 claims10%
Drug classes CMS tracks in Alwin Diaz's Part D claims, 2024
- Opioids0%13 of 3,754 claims
- Antipsychotics, patients 65 and over5%198 of 3,754 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
Alwin A. Diaz offers telehealth to Medicare patients
Alwin Diaz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Alwin Diaz as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Alwin A. Diaz received $18 in industry payments in 2025
CMS Open Payments shows 1 general payment to Alwin Diaz from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Alvogen Inc paid the most, $18.
Companies that paid Alwin Diaz 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 Alwin A. Diaz'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 Alwin A. Diaz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Alwin A. Diaz's NPI number?
Alwin A. Diaz's NPI number is 1245610658. It was assigned on June 2, 2015, and it is active in the NPI Registry.
What does Alwin A. Diaz specialize in?
Alwin A. Diaz is a nurse practitioner in Waukesha, Wisconsin. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Alwin A. Diaz practice?
Alwin Diaz practices at 217 Wisconsin Ave, Waukesha, WI 53186. Alwin Diaz's primary practice is Horizon Healthcare, Inc in Waukesha, Wisconsin. Dmand AI also links Alwin Diaz to 1 group practice or clinic and 1 medical group.
What is Alwin A. Diaz's office phone number?
The practice phone on file for Alwin Diaz is (414) 376-5577.
What is Alwin A. Diaz's medical license number?
Alwin Diaz holds Wisconsin license 6367-33.
What medical group is Alwin A. Diaz part of?
Alwin Diaz is linked to Horizon Healthcare, Inc. Dmand AI links Alwin Diaz to 1 more medical group.
Does Alwin A. Diaz accept Medicare?
Yes. CMS lists Alwin Diaz as accepting Medicare assignment.
Does Alwin A. Diaz offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Alwin Diaz as offering telehealth services.
How many Medicare patients does Alwin A. Diaz see?
CMS counts 45 Medicare patients who saw Alwin Diaz in 2024, with an average age of 51.
Has Alwin A. Diaz received payments from drug or device companies?
CMS Open Payments shows $18 in general payments to Alwin Diaz from 1 company from 2025 to 2025. The largest total came from Alvogen Inc.
How long has Alwin A. Diaz been practicing?
Alwin Diaz graduated from medical school in 2014, 12 years ago.
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