Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

John Scott Maul, MD

Individual provider Hematology & Oncology Physician · NPI 1326014382

John Scott Maul, MD practises Medical Oncology in Grafton, Wisconsin. Graduated from Medical College of Wisconsin in 1999, 27 years ago. Practices with Parkview Health System Inc, a 1,336-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Indiana and Wisconsin.

Years since qualifying
27
Trained at
Medical College of Wisconsin
Licensed in
IN, WI
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

975 Port Washington Rd
Grafton, WI 53024-9201
Phone: (262) 857-5750
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1355 Mariners Dr, Warsaw, IN 46582-7145 — (260) 266-7100

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 48107 (WI)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 01094982A (IN)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 48107 (WI)

Record details

NPI number1326014382
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 28, 2006
Last updated in NPPESFebruary 3, 2025
Certification dateFebruary 3, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1999 (27 years in practice)
Group practice Parkview Health System Inc — 1336 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients402
Services billed 1,861 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $32 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Parkview Health System Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1336 clinicians in the practice; 12 are shown here.

Other providers in Grafton