Mark Diaz, PA-C
Physician Assistant · Madison, WI
Mark Diaz, PA-C is a physician assistant with a practice address in Madison, Wisconsin, and NPI 1700370020, issued on Jun 20, 2018. Check the license (Wisconsin 4404-23, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Diaz
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 4404-23 WI
Self-reported in NPPES; status is on the state search - Practice location
- 77 S Oakbridge CT Apt 105, Madison, WI 53717
- Phone
- (562) 659-3459
- Enumerated
- Jun 20, 2018
- Record last updated
- Jun 20, 2018 (not updated in 8 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Verify Mark Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 4404-23Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average physician assistant in 2024
215 Medicare Part D claims for 157 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 25 claims were for opioids.
Most prescribed
- Cephalexin26 claims
- Amoxicillin-Clavulanate Potass21 claims
- Ondansetron Odt20 claims
- Cefdinir14 claims
- Doxycycline Hyclate13 claims
- Prednisone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $108.84
1 payment: food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
396 physician assistant records list a practice address in Madison
They are 396 of the 15,014 NPPES records with a practice address in Madison, and 3,475 physician assistant records in Wisconsin.
All 396 in Madison → All 3,475 in Wisconsin → Every provider in Madison →
Other physician assistant records in Wisconsin
- Amber Abraham, PA-CGreen Bay, WI1598993297
- Roopa AchuriNeenah, WI1225531635
- Carleen Acker, PA-CMadison, WI1447514773
- Lauren Ackerman, PA-CCudahy, WI1992357982
- Jocelyn Acompanado, PA-CSheboygan, WI1770521486
- Kora Adam, PA-CBurlington, WI1952666554
- Stephanie Adamczyk, PAMilwaukee, WI1063007441
- Kristen Adamo, PANew Berlin, WI1437179520
- Beth Adams, PA-CMequon, WI1801237540
- Eric Adams, PAGreen Bay, WI1528445087
Common questions
What is Mark Diaz, PA-C's NPI number?
Mark Diaz, PA-C's National Provider Identifier (NPI) is 1700370020, issued on Jun 20, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Mark Diaz, PA-C located?
The NPPES record lists a practice address at 77 S Oakbridge CT Apt 105, Madison, WI, 53717. Phone: (562) 659-3459. Providers update this record themselves, so call before visiting.
How can I verify Mark Diaz, PA-C's license?
NPPES lists Wisconsin license number 4404-23, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Diaz, PA-C prescribe under Medicare Part D?
In 2024, Mark Diaz, PA-C had 215 Medicare Part D claims for 157 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.