Individual provider Active NPI

Larissa Michele Olson, PA

  • Physician Assistant
  • Middlebury, VT
National Provider Identifier
1558839043
Registry record updated Dec 18, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
0550031467 Issued in VT
Practice address
115 Porter Dr
Middlebury, VT 05753-8629
Phone
(802) 388-8842
NPI assigned
Nov 2, 2018
Last updated
Dec 18, 2024By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 18, 2024

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X PA2421 ME
Physician Assistant 363A00000X 1947 NH
Physician Assistant 363A00000X 0550031467 VT Primary
Medical Physician Assistant 363AM0700X 023278 NY

Addresses

Primary practice location

115 Porter Dr
Middlebury, VT 05753-8629

Mailing address

420 Franklin St
Rumford, ME 04276-2104

Other practice location 1

16 Hospital Rd
Plymouth, NH 03264-1199
Phone (603) 536-1120

Other practice location 2

118 Northport Ave
Belfast, ME 04915-6072
Phone (585) 943-2282

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY, VT, NH, ME4 enrollments
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 4

Enrollment IDStateProvider typePAC IDDetails
I20190610002506 NY Practitioner - Physician Assistant 6103159967 Reassigns benefits to 3 organizations
I20200826000396 VT Practitioner - Physician Assistant 6103159967 Reassigns benefits to 3 organizations
I20230217000989 NH Practitioner - Physician Assistant 6103159967 Reassigns benefits to 2 organizations
I20231030001544 ME Practitioner - Physician Assistant 6103159967 Reassigns benefits to 8 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
MainehealthGroup PAC ID 7517860588, shared by 31 NPIs, 2,616 clinicians
Porter Hospital IncGroup PAC ID 1850365180, shared by 5 NPIs, 116 clinicians
Memorial HospitalGroup PAC ID 2365418993, 79 clinicians
Rumford HospitalGroup PAC ID 3870583511, 37 clinicians

Practice addresses (Care Compare)

111 Franklin Health CMNS
Farmington, ME 04938-6144
Phone (207) 779-3113

115 Porter Dr
Middlebury, VT 05753-8423
Phone (802) 388-4701

181 Franklin Health CMNS
Farmington, ME 04938-6144

22 Bramhall St
Portland, ME 04102-3134
Phone (207) 885-9905

3073 White Mountain Hwy
North Conway, NH 03860-7101
Phone (603) 356-5461

35 Mile St
Damariscotta, ME 04543-4047
Phone (207) 563-1234

420 Franklin St
Rumford, ME 04276-2104
Phone (207) 369-1000

82 Catamount Park
Middlebury, VT 05753-1292
Phone (802) 388-7185

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

State licenses

LicenseStateTypeSpecialty
1947NHMDSpeech-Language Pathologist
PA2421MEMDPhysician Assistant
0550031467VTMDPhysician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Mainehealth CurrentSince Dec 4, 2023 Accepting new patients
Central Maine Medical Center CurrentSince Jan 29, 2024 Accepting new patients
Concord Hospital-Laconia CurrentSince Jan 27, 2023 Accepting new patients
Central Maine Medical Center CurrentSince Jan 29, 2024 Accepting new patients
Rochester General Hospital Physician Assistant CurrentSince Mar 14, 2020 Accepting new patients
Porter Hospital, Inc CurrentSince Jul 1, 2020 Accepting new patients
Rochester General Hospital CurrentSince Mar 14, 2020 Accepting new patients
The Unity Hospital of Rochester CurrentSince Apr 23, 2019 Accepting new patients
Bridgton Hospital CurrentSince Jan 29, 2024 Accepting new patients
Mainehealth CurrentSince Dec 4, 2023 Accepting new patients
University of Vermont Medical Center Inc CurrentSince Sep 8, 2021 Accepting new patients
Memorial Hospital CurrentSince Apr 29, 2024 Accepting new patients
Porter Hospital Inc Current Accepting new patients
Mainehealth Current Accepting new patients
Mainehealth CurrentSince Dec 16, 2025 Accepting new patients
Rumford Hospital CurrentSince Jan 29, 2024 Accepting new patients

Locations

118 Northport Ave
Belfast, ME 04915
Phone (207) 338-9345

10 Hospital Dr
Bridgton, ME 04009
Phone (207) 647-6000

300 Main St
Lewiston, ME 04240
Phone (207) 795-2400

22 Bramhall St
Portland, ME 04102
Phone (207) 662-2179

420 Franklin St
Rumford, ME 04276
Phone (207) 364-4581

250 Pleasant St
Concord, NH 03301
Phone (603) 225-2711

80 Highland St
Laconia, NH 03246
Phone (603) 527-7100

238 Daniel Webster Hwy
Meredith, NH 03253
Phone (603) 279-7464

3073 White Mountain Hwy
North Conway, NH 03860
Phone (603) 356-5472

100 Kings Hwy S
Rochester, NY 14617
Phone (585) 922-0553

1425 Portland Ave
Rochester, NY 14621
Phone (585) 922-3122

1555 Long Pond Rd
Rochester, NY 14626
Phone (585) 429-2289

1 S Prospect St
Burlington, VT 05401
Phone (802) 847-4531

104 Porter Dr
Middlebury, VT 05753
Phone (802) 388-5682

115 Porter Dr
Middlebury, VT 05753
Phone (802) 388-4701

82 Catamount Park
Middlebury, VT 05753
Phone (802) 388-7185

Interoperability endpoints

  • FHIR API: https://fhir-myrecord.cerner.com/r4/4517c430-03bf-4e32-b324-1387cc4e73f3/
  • Direct secure messaging: lmurphey378276@direct.uvmhealth.org
  • Direct secure messaging: lmurphey642013@direct.mmc.mainehealth.org

Organizations & group practices 23

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

View all 23

Hospital & facility affiliations 6

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1541116800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1734480000000",
    "number": "1558839043",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "420 FRANKLIN ST",
            "city": "RUMFORD",
            "state": "ME",
            "postal_code": "042762104"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "115 PORTER DR",
            "city": "MIDDLEBURY",
            "state": "VT",
            "postal_code": "057538629",
            "telephone_number": "802-388-8842"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "16 Hospital Rd",
            "address_purpose": "LOCATION",
            "city": "Plymouth",
            "state": "NH",
            "postal_code": "032641199",
            "country_code": "US",
            "telephone_number": "603-536-1120",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "118 Northport Ave",
            "address_purpose": "LOCATION",
            "city": "Belfast",
            "state": "ME",
            "postal_code": "049156072",
            "country_code": "US",
            "telephone_number": "585-943-2282",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OLSON",
        "first_name": "LARISSA",
        "middle_name": "MICHELE",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-11-02",
        "last_updated": "2024-12-18",
        "certification_date": "2024-12-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "ME",
            "license": "PA2421",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "NH",
            "license": "1947",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "VT",
            "license": "0550031467",
            "primary": true
        },
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "NY",
            "license": "023278",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Middlebury, VT

Sources for this page

Verify at the official NPI Registry.