Active NPI
William Henry Parker VI, MD
- Clinical Cardiac Electrophysiology Physician
- Iowa City, IA
National Provider Identifier
1558921189
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Cardiac Electrophysiology Physician
- License
- 35.153818
- Practice address
- 200 Hawkins Dr
Iowa City, IA 52242-1009 - Phone
- (319) 384-8001
- Fax
- (319) 353-6343
- NPI assigned
- Jun 17, 2019
- Last updated
- May 29, 2025
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 4
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | 57.248517 | OH | |
| Cardiovascular Disease Physician | 207RC0000X | R-12596 | IA | |
| Cardiovascular Disease Physician | 207RC0000X | MD-51967 | IA | |
| Clinical Cardiac Electrophysiology Physician | 207RC0001X | 35.153818 | OH | Primary |
Addresses
Primary practice location
200 Hawkins Dr
Iowa City, IA 52242-1009
Mailing address
200 Hawkins Dr
Iowa City, IA 52242-1009
Phone (319) 384-8001
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| MD-51967 | IA | MD | Cardiovascular Disease Physician |
| R-12596 | IA | MD | Cardiovascular Disease Physician |
| 35.153818 | OH | MD | Clinical Cardiac Electrophysiology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Floyd County Memorial Hospital Commission | Past | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
- Critical Access Hospital
- Charles City, IA
- NPI 1265402390
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1560729600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1748476800000",
"number": "1558921189",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "200 HAWKINS DR",
"city": "IOWA CITY",
"state": "IA",
"postal_code": "522421009",
"telephone_number": "319-384-8001",
"fax_number": "319-353-6343"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "200 HAWKINS DR",
"city": "IOWA CITY",
"state": "IA",
"postal_code": "522421009",
"telephone_number": "319-384-8001",
"fax_number": "319-353-6343"
}
],
"practiceLocations": [],
"basic": {
"last_name": "PARKER",
"first_name": "WILLIAM",
"middle_name": "HENRY",
"name_prefix": "Dr.",
"name_suffix": "VI",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2019-06-17",
"last_updated": "2025-05-29",
"certification_date": "2025-05-29",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "OH",
"license": "57.248517",
"primary": false
},
{
"code": "207RC0000X",
"taxonomy_group": "",
"desc": "Internal Medicine, Cardiovascular Disease",
"state": "IA",
"license": "R-12596",
"primary": false
},
{
"code": "207RC0000X",
"taxonomy_group": "",
"desc": "Internal Medicine, Cardiovascular Disease",
"state": "IA",
"license": "MD-51967",
"primary": false
},
{
"code": "207RC0001X",
"taxonomy_group": "",
"desc": "Internal Medicine, Clinical Cardiac Electrophysiology",
"state": "OH",
"license": "35.153818",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Iowa City, IA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 29, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.