Dr. Juan F. Diaz, MD
- Medicare services, 2024
- 2,189
- Medicare patients, 2024
- 908
- Part D claims, 2024
- 4,580
- Hospital affiliations
- 5
- Industry payments
- $5,584
- Practice address
- 430 E Division St, Fond Du Lac, WI 54935
- Practice phone
- Call (920) 929-2300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. 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.
Dr. Juan F. Diaz is an interventional cardiologist in Fond Du Lac, Wisconsin
Dr. Diaz practices at SSM Health St. Agnes Hospital - Fond du Lac in Fond Du Lac, Wisconsin, part of SSM Health Care.
Dr. Diaz's NPI, 1780793737, was assigned on August 30, 2006. Dr. Diaz holds Wisconsin license 41345.
- NPI
- 1780793737NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133217722
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 929-2300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Juan F. Diaz practices at SSM Health St. Agnes Hospital - Fond du Lac in Fond Du Lac, Wisconsin
Dr. Diaz's primary practice is SSM Health St. Agnes Hospital - Fond du Lac, at 430 E Division St, Fond Du Lac, WI 54935 in Fond Du Lac County. The practice phone is (920) 929-2300.
- SSM Health St. Agnes Hospital - Fond du Lac430 E Division St, Fond Du Lac, WI 54935 · Fond Du Lac CountyPhone(920) 929-2300
Source: Dmand AI Affiliation Data
Dr. Juan F. Diaz is affiliated with 6 sites of care and 1 medical group
Dr. Diaz's primary practice is SSM Health St. Agnes Hospital - Fond du Lac in Fond Du Lac, Wisconsin, part of SSM Health Care. Dr. Diaz is also affiliated with Aurora Medical Center - Oshkosh. The medical group on file is SSM Health St. Agnes Hospital - Fond du Lac. Dmand AI also links Dr. Diaz to 3 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Juan F. Diaz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diaz practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Agnes Hospital - Fond du Lac | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Juan F. Diaz is one of 120 interventional cardiologists in Wisconsin
Interventional cardiology is Dr. Diaz's primary specialty in the NPI Registry, under taxonomy code 207RI0011X. Dr. Diaz is licensed in Wisconsin.
Specialties and state licenses
- Interventional cardiology, WisconsinPrimary
Interventional cardiologists near Dr. Diaz
Counts of interventional cardiologists 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. Juan F. Diaz billed Medicare for 2,189 services in 2024
CMS data shows 2,189 Medicare services from Dr. Diaz across 23 procedure codes in 2024, for 908 Medicare patients. Medicare paid $76,718 for them.
Dr. Diaz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,8562024: 1,8801%
- Office and hospital visits
- 2023: 2242024: 2292%
- Imaging
- 2023: 672024: 693%
- Surgery
- 2023: 172024: 1135%
Where Dr. Diaz's Medicare services took place, 2024
- In an office301%
- In a facility2,15999%
Dr. Diaz compared with the Wisconsin median for interventional cardiologists, 2024
- Dr. Diaz
- Wisconsin median
- Medicare services
- 2,189vs 1,28770% above
- Medicare patients
- 908vs 67235% above
- Part D claims
- 4,434vs 1,8202.4 times
Medians across 120 interventional cardiologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Diaz'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. Diaz and other interventional cardiologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Juan F. Diaz treated 908 Medicare patients in 2024, average age 76
CMS counts 908 Medicare patients who saw Dr. Diaz in 2024. The largest group is 65 to 74, with 336 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.63, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Diaz's median patient age at 73, with 45% women.
Dr. Diaz's Medicare patients by age, 2024
Dr. Diaz's Medicare patients by sex, 2024
- Women42347%
- Men48553%
Chronic conditions among Dr. Diaz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease54%
- Heart failure43%
- Arthritis41%
- Atrial fibrillation39%
- Chronic kidney disease39%
- Diabetes37%
Share of Medicare patients with each condition. A patient can have several.
Dr. 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 73
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Juan F. Diaz wrote 4,580 Medicare Part D claims in 2024
In 2024, Dr. Diaz wrote 4,580 Medicare Part D claims for 795 patients. 91% of them were for generic drugs. CMS names the drug for 4,434 of them, across 43 drugs with 11 or more claims each, at $479,642 in total drug cost. In 2023, CMS named 3,657 claims across 40 drugs.
Dr. Diaz's Part D claims by kind of drug, 2024
- Generic4,153 claims91%
- Brand-name427 claims9%
Dr. Diaz'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. Diaz's Part D claims, 2024
- Antibiotics1%29 of 4,580 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: 3,6572024: 4,43421%
Drugs named by CMS: 43 in 2024, 40 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. Juan F. Diaz ranks in the 64th percentile for coronary angioplasty and stenting in Medicare
Dr. Diaz accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 29 procedures of coronary angioplasty and stenting by Dr. Diaz, more than 64% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Diaz ranks in Medicare procedure volume
- Coronary angioplasty and stenting
- 64th percentile29 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Juan F. Diaz received $5,584 in industry payments from 2016 to 2025
CMS Open Payments shows 184 general payments to Dr. Diaz from 25 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Boston Scientific Corporation paid the most, $2,427.
General payments to Dr. Diaz by program year, 2016 to 2025
General payments to Dr. Diaz by kind, 2016 to 2025
- Food and beverage$5,49298%
- Travel and lodging$501%
- Education$421%
Companies that paid Dr. Diaz the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Juan F. 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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)Doctors and Clinicians Utilization Data (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 Dr. Juan F. 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 Dr. Juan F. Diaz's NPI number?
Dr. Juan F. Diaz's NPI number is 1780793737. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Juan F. Diaz?
Dr. Juan F. Diaz is an interventional cardiologist in Fond Du Lac, Wisconsin. The primary specialty in the NPI Registry is Interventional Cardiology Physician (taxonomy code 207RI0011X).
Where does Dr. Juan F. Diaz practice?
Dr. Diaz practices at 430 E Division St, Fond Du Lac, WI 54935. Dr. Diaz's primary practice is SSM Health St. Agnes Hospital - Fond du Lac in Fond Du Lac, Wisconsin, part of SSM Health Care. Dmand AI also links Dr. Diaz to 3 hospitals and 1 group practice or clinic.
What is Dr. Juan F. Diaz's office phone number?
The practice phone on file for Dr. Diaz is (920) 929-2300.
What is Dr. Juan F. Diaz's medical license number?
Dr. Diaz holds Wisconsin license 41345.
Which hospitals is Dr. Juan F. Diaz affiliated with?
Dr. Diaz practices at SSM Health St. Agnes Hospital - Fond du Lac in Fond Du Lac, Wisconsin. Dr. Diaz is also affiliated with Aurora Medical Center - Oshkosh. Dmand AI links Dr. Diaz to 3 more hospitals.
What medical group is Dr. Juan F. Diaz part of?
Dr. Diaz is linked to SSM Health St. Agnes Hospital - Fond du Lac.
Does Dr. Juan F. Diaz accept Medicare?
Yes. CMS data shows Dr. Diaz billed Medicare for 2,189 services in 2024, and Dr. Diaz accepts Medicare assignment.
How many Medicare patients does Dr. Juan F. Diaz see?
CMS counts 908 Medicare patients who saw Dr. Diaz in 2024, with an average age of 76.
What services does Dr. Juan F. Diaz bill to Medicare?
In 2024, Dr. Diaz's most billed Medicare services were heart test or procedure (93010), heart test or procedure (93306) and office visit, established patient (99214).
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What drugs does Dr. Juan F. Diaz prescribe most?
In 2024 Medicare Part D data, Dr. Diaz's most prescribed drugs by claims were Atorvastatin Calcium, Metoprolol Succinate and Clopidogrel.
Has Dr. Juan F. Diaz received payments from drug or device companies?
CMS Open Payments shows $5,584 in general payments to Dr. Diaz from 25 companies from 2016 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Juan F. Diaz been practicing?
Dr. Diaz graduated from medical school in 1982, 44 years ago.
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