Active NPI
William Henry Slavin IV, DDS
- General Practice Dentistry
- Manteno, IL
National Provider Identifier
1992708978
On this page
Key facts
NPPES NPI Registry- Primary specialty
- General Practice Dentistry
- Practice address
- 1 N Main St
Manteno, IL 60950-1534 - Phone
- (815) 468-8832
- Fax
- (815) 468-8862
- NPI assigned
- May 24, 2005
- Reactivated
- Mar 23, 2006
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| General Practice Dentistry | 1223G0001X | IL | Primary |
Addresses
Primary practice location
1 N Main St
Manteno, IL 60950-1534
Mailing address
1 N Main St
Manteno, IL 60950-1534
Phone (815) 468-8832
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)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 019020318 | IL | MD | General Practice Dentistry |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| William H. Slavin DDS LTD | General Practice | 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 and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1116892800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1992708978",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1 N MAIN ST",
"city": "MANTENO",
"state": "IL",
"postal_code": "609501534",
"telephone_number": "815-468-8832",
"fax_number": "815-468-8862"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1 N MAIN ST",
"city": "MANTENO",
"state": "IL",
"postal_code": "609501534",
"telephone_number": "815-468-8832",
"fax_number": "815-468-8862"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SLAVIN",
"first_name": "WILLIAM",
"middle_name": "HENRY",
"name_prefix": "Dr.",
"name_suffix": "IV",
"credential": "DDS",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-05-24",
"last_updated": "2026-07-13",
"deactivation_date": "2006-03-16",
"reactivation_date": "2006-03-23",
"status": "A"
},
"taxonomies": [
{
"code": "1223G0001X",
"taxonomy_group": "",
"desc": "Dentist, General Practice",
"state": "IL",
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Manteno, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.