Active NPI
William John Lyons, D.D.S.
- General Practice Dentistry
- Bethesda, MD
National Provider Identifier
1013968031
On this page
Key facts
NPPES NPI Registry- Primary specialty
- General Practice Dentistry
- License
- 7338
- Practice address
- 8901 Wisconsin Ave
Bethesda, MD 20889-0001 - Phone
- (301) 295-5440
- NPI assigned
- May 15, 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 | 7338 | IA | Primary |
Addresses
Primary practice location
8901 Wisconsin Ave
Bethesda, MD 20889-0001
Mailing address
235 Congressional LN
Rockville, MD 20852-1559
Phone (240) 620-3941
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 |
|---|---|---|---|
| 7338 | IA | MD | General Practice Dentistry |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1147651200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1013968031",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "235 CONGRESSIONAL LN",
"city": "ROCKVILLE",
"state": "MD",
"postal_code": "208521559",
"telephone_number": "240-620-3941"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "8901 WISCONSIN AVE",
"city": "BETHESDA",
"state": "MD",
"postal_code": "208890001",
"telephone_number": "301-295-5440"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LYONS",
"first_name": "WILLIAM",
"middle_name": "JOHN",
"credential": "D.D.S.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-05-15",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "1223G0001X",
"taxonomy_group": "",
"desc": "Dentist, General Practice",
"state": "IA",
"license": "7338",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Bethesda, MD
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.