Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Henry Parker VI, MD

Individual provider Internal Medicine Physician · NPI 1558921189

Dr. William Henry Parker VI, MD is an Internal Medicine Physician in Iowa City, Iowa. Practices as a sole proprietor. Licensed in Iowa and Ohio.

Licensed in
IA, OH
In the registry since
2019
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

200 Hawkins Dr
Iowa City, IA 52242-1009
Phone: (319) 384-8001
Fax: (319) 353-6343
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Cardiac Electrophysiology Physician (primary) Taxonomy 207RC0001X · Licence 35.153818 (OH)
Internal Medicine Physician Taxonomy 207R00000X · Licence 57.248517 (OH)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence R-12596 (IA)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence MD-51967 (IA)

Record details

NPI number1558921189
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 17, 2019
Last updated in NPPESMay 29, 2025
Certification dateMay 29, 2025

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 $234 4 payments · 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.

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