Individual provider Active NPI

Joseph Edward Loo, CRNA

  • Certified Registered Nurse Anesthetist
  • Seattle, WA
National Provider Identifier
1629733829
Registry record updated Jul 8, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Certified Registered Nurse AnesthetistTaxonomy code 367500000X
License
ARNP.AP.70060957-CRN Issued in WA
Practice address
325 9TH Ave
Seattle, WA 98104-2420
Phone
(206) 520-5000
NPI assigned
Nov 2, 2021
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 8, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Certified Registered Nurse Anesthetist 367500000X ARNP.AP.70060957-CRN WA Primary

Addresses

Primary practice location

325 9TH Ave
Seattle, WA 98104-2420

Mailing address

PO Box 50095
Seattle, WA 98145-5095
Phone (206) 520-5700

Other names 1

  • Joseph Loo Professional name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in TN, WA2 enrollments

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20250217000414 TN Practitioner - Certified Registered Nurse Anesthetist (Crna) 4688104938 Reassigns benefits to 1 organization
I20260528004519 WA Practitioner - Certified Registered Nurse Anesthetist (Crna) 4688104938 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Certified Registered Nurse Anesthetist (Crna)
Education
Other, 2024
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
The Association of University PhysiciansGroup PAC ID 0446162697, 3,484 clinicians

Practice addresses (Care Compare)

1924 Alcoa Hwy
Knoxville, TN 37920-1511
Phone (865) 305-9220

325 9TH Ave
Seattle, WA 98104-2420
Phone (206) 731-3000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
1176841ALMDRegistered Nurse
37935TNMDCertified Registered Nurse Anesthetist

Practice roles

OrganizationSpecialtyStatusNew patients
University Anesthesiologists, PLLC Nurse Anesthetist, Certified Registered CurrentSince Dec 7, 2024 Accepting new patients
University Anesthesiologists, PLLC Past Accepting new patients

Locations

1924 Alcoa Hwy
Knoxville, TN 37920
Phone (865) 305-9000

1924 Alcoa Hwy
#U109
Knoxville, TN 37920
Phone (865) 305-9220

Organizations & group practices 3

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 2

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": "1635811200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783468800000",
    "number": "1629733829",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 50095",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981455095",
            "telephone_number": "206-520-5700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "325 9TH AVE",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981042420",
            "telephone_number": "206-520-5000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LOO",
        "first_name": "JOSEPH",
        "middle_name": "EDWARD",
        "credential": "CRNA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-11-02",
        "last_updated": "2026-07-08",
        "certification_date": "2026-07-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "WA",
            "license": "ARNP.AP.70060957-CRN",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "JOSEPH",
            "last_name": "LOO",
            "credential": "RN",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

Other providers in Seattle, WA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.