Active NPI
Leonard Duane Hart, O.D.
- Optometrist
- Collinsville, OK
National Provider Identifier
1518907765
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Optometrist
- License
- 981
- Practice address
- 1103 W Center St
Collinsville, OK 74021-3108 - Phone
- (918) 371-3339
- Fax
- (918) 371-9600
- NPI assigned
- Jun 7, 2006
- Last updated
- Sep 29, 2026
- 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 |
|---|---|---|---|---|
| Optometrist | 152W00000X | 981 | OK | Primary |
Addresses
Primary practice location
1103 W Center St
Collinsville, OK 74021-3108
Mailing address
1103 W Center St
PO Box 640
Collinsville, OK 74021-3108
Phone (918) 317-3339
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100763740A | Medicaid | OK |
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
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 981 | OK | MD | Addiction (Substance Use Disorder) Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1149638400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1790640000000",
"number": "1518907765",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1103 W CENTER ST",
"address_2": "PO BOX 640",
"city": "COLLINSVILLE",
"state": "OK",
"postal_code": "740213108",
"telephone_number": "918-317-3339",
"fax_number": "918-371-9600"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1103 W CENTER ST",
"city": "COLLINSVILLE",
"state": "OK",
"postal_code": "740213108",
"telephone_number": "918-371-3339",
"fax_number": "918-371-9600"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HART",
"first_name": "LEONARD",
"middle_name": "DUANE",
"name_prefix": "Dr.",
"credential": "O.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-06-07",
"last_updated": "2026-09-29",
"status": "A"
},
"taxonomies": [
{
"code": "152W00000X",
"taxonomy_group": "",
"desc": "Optometrist",
"state": "OK",
"license": "981",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "100763740A",
"state": "OK"
}
],
"endpoints": [],
"other_names": []
}Other providers in Collinsville, OK
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 29, 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.