Active NPI
Mark Leroy Harris, D.M.D.
- Dentist
- La Grande, OR
National Provider Identifier
1184622797
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dentist
- License
- 6922
- Practice address
- 1809 3Rd St
La Grande, OR 97850-2244 - Phone
- (541) 963-0924
- Fax
- (541) 962-0924
- NPI assigned
- Jul 8, 2005
- 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 |
|---|---|---|---|---|
| Dentist | 122300000X | 6922 | OR | Primary |
Addresses
Primary practice location
1809 3Rd St
La Grande, OR 97850-2244
Mailing address
1805 Highland Dr
La Grande, OR 97850-3209
Phone (541) 962-0493
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 |
|---|---|---|---|
| 6922 | OR | MD | Dentist |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mark Harris, D.M.D., P.C. | Past | Accepting new patients | |
| Stephen M. McLean, D.M.D.,P.C. | Past | Accepting new patients |
Organizations & group practices 2
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.
-
- General Practice Dentistry
- La Grande, OR
- NPI 1396043600
-
- General Practice Dentistry
- La Grande, OR
- NPI 1376841684
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1120780800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1184622797",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1805 HIGHLAND DR",
"city": "LA GRANDE",
"state": "OR",
"postal_code": "978503209",
"telephone_number": "541-962-0493",
"fax_number": "541-962-0924"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1809 3RD ST",
"city": "LA GRANDE",
"state": "OR",
"postal_code": "978502244",
"telephone_number": "541-963-0924",
"fax_number": "541-962-0924"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HARRIS",
"first_name": "MARK",
"middle_name": "LEROY",
"credential": "D.M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-07-08",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "122300000X",
"taxonomy_group": "",
"desc": "Dentist",
"state": "OR",
"license": "6922",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in La Grande, OR
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.