Active NPI
William Theodore Olsen III, MD
- Psychiatry Physician
- Augusta, ME
National Provider Identifier
1285210054
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- MD30597
- Practice address
- 11 Caldwell Rd
Augusta, ME 04330-5739 - Phone
- (207) 213-2037
- NPI assigned
- Mar 22, 2021
- 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 |
|---|---|---|---|---|
| Psychiatry Physician | 2084P0800X | MD30597 | ME | Primary |
Addresses
Primary practice location
11 Caldwell Rd
Augusta, ME 04330-5739
Mailing address
11 Caldwell Rd
Augusta, ME 04330-5739
Phone (207) 213-2037
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Eligible to order & refer
- Part B services: No
- Medical equipment: Yes
- Home health: No
- Power mobility devices: Yes
- Hospice: No
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1616371200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1786838400000",
"number": "1285210054",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "11 CALDWELL RD",
"city": "AUGUSTA",
"state": "ME",
"postal_code": "043305739",
"telephone_number": "207-213-2037"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "11 CALDWELL RD",
"city": "AUGUSTA",
"state": "ME",
"postal_code": "043305739",
"telephone_number": "207-213-2037"
}
],
"practiceLocations": [],
"basic": {
"last_name": "OLSEN",
"first_name": "WILLIAM",
"middle_name": "THEODORE",
"name_suffix": "III",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2021-03-22",
"last_updated": "2026-08-16",
"certification_date": "2026-08-16",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "ME",
"license": "MD30597",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Augusta, ME
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 16, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.