Dr. William Henry Parker Vi, MD
- Part D claims, 2024
- 59
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $1,612
- State licenses
- 2
- Practice address
- 800 11th St, Charles City, IA 50616
- Practice phone
- Call (641) 228-6830
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Parker'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. William Henry Parker Vi is a cardiologist in Charles City, Iowa
Dr. Parker practices at Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center.
Dr. Parker's NPI, 1558921189, was assigned on June 17, 2019. Dr. Parker holds Iowa license MD-51967.
- NPI
- 1558921189NPI Registry (opens in a new tab)
- NPI enumeration date
- June 17, 2019
- NPI status
- Active
- Practice phone
- (641) 228-6830
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Henry Parker Vi practices at Floyd County Medical Center in Charles City, Iowa
Dr. Parker's primary practice is Floyd County Medical Center, at 800 11th St, Charles City, IA 50616 in Floyd County. The practice phone is (641) 228-6830.
- Floyd County Medical Center800 11th St, Charles City, IA 50616 · Floyd CountyPhone(641) 228-6830
Source: Dmand AI Affiliation Data
Dr. William Henry Parker Vi is affiliated with 1 site of care
Dr. Parker's primary practice is Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Henry Parker Vi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Parker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Floyd County Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Floyd County Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Henry Parker Vi is one of 166 cardiologists in Iowa
Cardiovascular disease is Dr. Parker's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dmand AI has Dr. Parker's licenses on file in 2 states: Iowa and Ohio.
Specialties and state licenses
- Cardiovascular disease, IowaPrimary
- Internal medicine, Ohio
Cardiologists near Dr. Parker
Counts of 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. William Henry Parker Vi's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Parker's median patient age at 67, with 31% women.
Dr. Parker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women31%
- Men69%
Source: Dmand AI Patient Panel Data
Dr. William Henry Parker Vi wrote 59 Medicare Part D claims in 2024
In 2024, Dr. Parker wrote 59 Medicare Part D claims for 20 patients. 78% of them were for generic drugs. They cover 9 drugs, with $1,424 in total drug cost. In 2021, CMS named 285 claims across 12 drugs.
Dr. Parker's Part D claims by kind of drug, 2024
- Generic46 claims78%
- Brand-name13 claims22%
Dr. Parker's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 2852022: 15247%
Drugs named by CMS: 9 in 2022, 12 in 2021.
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
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. William Henry Parker Vi has 2 publications on record
Dmand AI links 2 papers to Dr. Parker, published from 2023 to 2024. Dr. Parker's most frequent co-authors are Brian Olshansky, MD, Milena Anna Gebska, MD, PhD and Samuel Lewis Johnston, MD.
Dr. Parker's most frequent co-authors
- Brian Olshansky, MD2 shared papers
- Milena Anna Gebska, MD, PhD1 shared paper
- Samuel Lewis Johnston, MD1 shared paper
Recent publications by Dr. Parker
See who Dr. Parker researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Parker works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William Henry Parker Vi received $1,612 in industry payments from 2020 to 2025
CMS Open Payments shows 23 general payments to Dr. Parker from 12 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 52% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $538.
General payments to Dr. Parker by program year, 2020 to 2025
General payments to Dr. Parker by kind, 2020 to 2025
- Food and beverage$83752%
- Speaker and faculty fees$51032%
- Education$26516%
Companies that paid Dr. Parker the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Henry Parker Vi'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. William Henry Parker Vi
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. William Henry Parker Vi's NPI number?
Dr. William Henry Parker Vi's NPI number is 1558921189. It was assigned on June 17, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. William Henry Parker Vi?
Dr. William Henry Parker Vi is a cardiologist in Charles City, Iowa. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. William Henry Parker Vi practice?
Dr. Parker practices at 800 11th St, Charles City, IA 50616. Dr. Parker's primary practice is Floyd County Medical Center in Charles City, Iowa, part of Floyd County Medical Center.
What is Dr. William Henry Parker Vi's office phone number?
The practice phone on file for Dr. Parker is (641) 228-6830.
What is Dr. William Henry Parker Vi's medical license number?
Dr. Parker holds Iowa license MD-51967, one of the licenses on file in 2 states.
Which states has Dr. William Henry Parker Vi been licensed in?
Dmand AI has state licenses on file for Dr. Parker in Iowa and Ohio.
Which hospitals is Dr. William Henry Parker Vi affiliated with?
Dr. Parker practices at Floyd County Medical Center in Charles City, Iowa.
What drugs does Dr. William Henry Parker Vi prescribe most?
In 2022 Medicare Part D data, Dr. Parker's most prescribed drugs by claims were Atorvastatin Calcium, Metformin HCl and Metoprolol Succinate.
Has Dr. William Henry Parker Vi received payments from drug or device companies?
CMS Open Payments shows $1,612 in general payments to Dr. Parker from 12 companies from 2020 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. William Henry Parker Vi been practicing?
Dr. Parker's NPI was assigned in 2019.
Does Dr. William Henry Parker Vi do research?
Dmand AI links 2 publications to Dr. Parker, published from 2023 to 2024.
Who does Dr. William Henry Parker Vi publish with?
Dr. Parker's most frequent co-authors are Brian Olshansky, MD (2 shared papers), Milena Anna Gebska, MD, PhD (1 shared paper) and Samuel Lewis Johnston, MD (1 shared paper).
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