NPIMap

Individual provider Active NPI

Tammy Mai, D.O.

  • Anesthesiology Physician
  • Portland, OR
National Provider Identifier
1275821902
Registry record updated Dec 8, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
DO173813 Issued in OR
Practice address
707 SW Washington St
Suite 700
Portland, OR 97205-3536
Phone
(503) 299-9906
Fax
(503) 225-9002
NPI assigned
Jul 15, 2011
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Dec 8, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X 2011015606 MO
Anesthesiology Physician 207L00000X DO173813 OR Primary

Addresses

Primary practice location

707 SW Washington St
Suite 700
Portland, OR 97205-3536

Mailing address

PO Box 35147
#1801
Seattle, WA 98124-5147
Phone (503) 299-9906

Other practice location 1

3600 NW Samaritan Dr
Corvallis, OR 97330-5472
Phone (541) 768-5111

Other identifiers 1

IdentifierTypeStateIssuer
500693239MedicaidOR

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address tmai332284@samhealth.direct-ci.com

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in OR, WA2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20151029001785 OR Practitioner - Anesthesiology 3971730136 Reassigns benefits to 4 organizations
I20220307002014 WA Practitioner - Anesthesiology 3971730136 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology
Education
University of North Texas HSC, College of Osteopathic Med, 2010
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Oregon Anesthesiology Group PCGroup PAC ID 3476451659, 239 clinicians
Good Samaritan Hospital CorvallisGroup PAC ID 1557270725, 372 clinicians
Salem HealthGroup PAC ID 8628986668, 470 clinicians

Practice addresses (Care Compare)

1015 NW 22ND Ave
Portland, OR 97210-3025
Phone (503) 299-9906

3600 NW Samaritan Dr
Corvallis, OR 97330-3737

890 Oak St SE
Salem, OR 97301-3905
Phone (503) 561-5200

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
2011015606MOMDAnesthesiology Physician
DO173813ORMDAnesthesiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Premier Anesthesia of Richland a Division of Premier Anesthesia, LLC Anesthesiology CurrentSince Nov 1, 2022 Accepting new patients
Columbia Anesthesia Group P S Anesthesiology CurrentSince Feb 11, 2022 Accepting new patients
Salem Health CurrentSince Sep 12, 2022 Accepting new patients
Salem Health CurrentSince Sep 12, 2022 Accepting new patients
Good Samaritan Hospital Corvallis Current Accepting new patients
Providence Wa Anesthesia Services, P.C. Anesthesiology CurrentSince May 1, 2022 Accepting new patients
Salem Health Current Accepting new patients
Good Samaritan Hospital Corvallis CurrentSince Nov 24, 2025 Accepting new patients
Good Samaritan Hospital Corvallis CurrentSince Nov 24, 2025 Accepting new patients
Oag Trauma Services LLC Anesthesiology PastSince Oct 12, 2015 Accepting new patients

Locations

3600 NW Samaritan Dr
Corvallis, OR 97330
Phone (541) 768-4906

3600 NW Samaritan Dr
Ste 227
Corvallis, OR 97330
Phone (541) 768-1261

1015 NW 22nd Ave
Portland, OR 97210
Phone (503) 413-7582

665 Winter St SE
Salem, OR 97301
Phone (503) 370-5634

890 Oak St SE
Salem, OR 97301
Phone (503) 585-0830

7300 SW Childs Rd
Ste A
Tigard, OR 97224
Phone (360) 828-5396

1321 Colby Ave
Everett, WA 98201
Phone (425) 259-4413

888 Swift Blvd
Richland, WA 99352
Phone (509) 942-2115

505 NE 87th Ave
Ste 210
Vancouver, WA 98664
Phone (360) 828-5396

400 NE Mother Joseph Pl
Vancouver, WA 98664
Phone (360) 514-2000

2211 NE 139th St
Vancouver, WA 98686
Phone (360) 397-1985

Interoperability endpoints

  • Direct secure messaging: tmai179031@direct.salemhealth.org
  • Direct secure messaging: tmai332284@samhealth.direct-ci.com

Organizations & group practices 11

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.

Hospital & facility affiliations 24

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

View all 24

NPI Registry JSON

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

{
    "created_epoch": "1310688000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765152000000",
    "number": "1275821902",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 35147",
            "address_2": "#1801",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981245147",
            "telephone_number": "503-299-9906",
            "fax_number": "503-225-9002"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "707 SW WASHINGTON ST",
            "address_2": "SUITE 700",
            "city": "PORTLAND",
            "state": "OR",
            "postal_code": "972053536",
            "telephone_number": "503-299-9906",
            "fax_number": "503-225-9002"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3600 NW Samaritan Dr",
            "address_purpose": "LOCATION",
            "city": "Corvallis",
            "state": "OR",
            "postal_code": "973305472",
            "country_code": "US",
            "telephone_number": "541-768-5111",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MAI",
        "first_name": "TAMMY",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2011-07-15",
        "last_updated": "2025-12-08",
        "certification_date": "2025-12-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "MO",
            "license": "2011015606",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "OR",
            "license": "DO173813",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "500693239",
            "state": "OR"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "tmai332284@samhealth.direct-ci.com",
            "affiliation": "N",
            "address_1": "3600 NW Samaritan Dr",
            "city": "Corvallis",
            "state": "OR",
            "country_code": "US",
            "postal_code": "973305472",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Portland, OR

Sources for this page

Verify at the official NPI Registry.