Active NPI
William A. Walker III, D.D.S.
- Endodontics
- Houston, TX
National Provider Identifier
1891734356
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Endodontics
- License
- 17380
- Practice address
- 1500 S Dairy Ashford St
Suite 114
Houston, TX 77077-3854 - Phone
- (281) 558-3440
- NPI assigned
- Jun 6, 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 |
|---|---|---|---|---|
| Endodontics | 1223E0200X | 17380 | TX | Primary |
Addresses
Primary practice location
1500 S Dairy Ashford St
Suite 114
Houston, TX 77077-3854
Mailing address
15519 Cloud Top
San Antonio, TX 78248-1348
Phone (210) 493-8933
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 |
|---|---|---|---|
| 17380 | TX | MD | Dentist |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Tracy M. Clark DDS Inc | Endodontics | 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.
-
- Endodontics
- Houston, TX
- NPI 1295889863
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1149552000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1891734356",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "15519 CLOUD TOP",
"city": "SAN ANTONIO",
"state": "TX",
"postal_code": "782481348",
"telephone_number": "210-493-8933"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1500 S DAIRY ASHFORD ST",
"address_2": "SUITE 114",
"city": "HOUSTON",
"state": "TX",
"postal_code": "770773854",
"telephone_number": "281-558-3440"
}
],
"practiceLocations": [],
"basic": {
"last_name": "WALKER",
"first_name": "WILLIAM",
"middle_name": "A.",
"name_prefix": "Dr.",
"name_suffix": "III",
"credential": "D.D.S.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-06-06",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "1223E0200X",
"taxonomy_group": "",
"desc": "Dentist, Endodontics",
"state": "TX",
"license": "17380",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Houston, TX
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.