Active NPI
Otto Walter Geissler III, D.D.S.
- Dentist
- Merced, CA
National Provider Identifier
1730150442
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dentist
- License
- 18834
- Practice address
- 1132 Olivewood Dr
Merced, CA 95348-1210 - Phone
- (209) 722-2435
- Fax
- (209) 722-7671
- NPI assigned
- Jan 30, 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 |
|---|---|---|---|---|
| Dentist | 122300000X | 18834 | CA | Primary |
Addresses
Primary practice location
1132 Olivewood Dr
Merced, CA 95348-1210
Mailing address
1132 Olivewood Dr
Merced, CA 95348-1210
Phone (209) 722-2435
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| B18834-01 | Medicaid | CA |
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 |
|---|---|---|---|
| 18834 | CA | MD | Occupational Therapist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1138579200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1730150442",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1132 OLIVEWOOD DR",
"city": "MERCED",
"state": "CA",
"postal_code": "953481210",
"telephone_number": "209-722-2435",
"fax_number": "209-722-7671"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1132 OLIVEWOOD DR",
"city": "MERCED",
"state": "CA",
"postal_code": "953481210",
"telephone_number": "209-722-2435",
"fax_number": "209-722-7671"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GEISSLER",
"first_name": "OTTO",
"middle_name": "WALTER",
"name_prefix": "Dr.",
"name_suffix": "III",
"credential": "D.D.S.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-01-30",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "122300000X",
"taxonomy_group": "",
"desc": "Dentist",
"state": "CA",
"license": "18834",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "B18834-01",
"state": "CA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Merced, CA
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.