Individual provider Active NPI

Yun Sok Choi, MD

  • Anesthesiology Physician
  • Walnut Creek, CA
National Provider Identifier
1669527164
Registry record updated Dec 2, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiology PhysicianTaxonomy code 207L00000X
License
G75578 Issued in CA
Practice address
1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122
Phone
(925) 939-3000
NPI assigned
Jan 24, 2007
Last updated
Dec 2, 2024By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 2, 2024

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiology Physician 207L00000X G75578 CA Primary

Addresses

Primary practice location

1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122

Mailing address

PO Box 7793
San Francisco, CA 94120-7793
Phone (503) 372-2740

Other practice location 1

2637 Shadelands Dr
Walnut Creek, CA 94598-2512
Phone (925) 627-3424

Other names 1

  • Randall Yun Sok Choi Professional name

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20090820000716 CA Practitioner - Anesthesiology 6901963834 Reassigns benefits to 4 organizations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
A50453CAMDAnesthesiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
John Muir Trauma Physicians Billing Service Current Accepting new patients
Bass Medical Group CurrentSince Dec 1, 2022 Accepting new patients
Bass Medical Group Current Accepting new patients
Bass Medical Group CurrentSince Dec 1, 2022 Accepting new patients
G2 Anesthesia PC Anesthesiology CurrentSince Jan 13, 2026 Accepting new patients
Premier Anesthesia of California, PC Anesthesiology CurrentSince Aug 15, 2024 Accepting new patients
John Muir Trauma Physicians Billing Service Anesthesiology CurrentSince Feb 5, 2010 Accepting new patients

Locations

1505 Saint Alphonsus Way
Alamo, CA 94507
Phone (925) 837-4225

3351 El Camino Real
Ste 220
Atherton, CA 94027
Phone (650) 363-2800

429 Llewellyn Ave
Campbell, CA 95008
Phone (408) 358-5000

901 Campus Dr
Ste 120
Daly City, CA 94015

39350 Civic Center Dr
Ste 100
Fremont, CA 94538
Phone (510) 456-4600

15047 Los Gatos Blvd
Ste 150
Los Gatos, CA 95032
Phone (408) 356-2244

4 Financial Plz
Napa, CA 94558
Phone (707) 266-7051

400 Forest Ave
Palo Alto, CA 94301
Phone (650) 289-1208

4626 Willow Rd
Ste 100
Pleasanton, CA 94588
Phone (925) 462-2334

5555 W Las Positas Blvd
Pleasanton, CA 94588
Phone (925) 416-3418

3370 Geary Blvd
San Francisco, CA 94118
Phone (415) 379-7500

2425 Samaritan Dr
San Jose, CA 95124
Phone (408) 354-2114

6001 Norris Canyon Rd
San Ramon, CA 94583
Phone (925) 275-8273

100 N Wiget Ln
Ste 140
Walnut Creek, CA 94598
Phone (530) 758-2324

133 La Casa Via
Ste 150
Walnut Creek, CA 94598
Phone (925) 210-8400

1601 Ygnacio Valley Rd
Walnut Creek, CA 94598
Phone (925) 295-1545

2021 Ygnacio Valley Rd
Ste H102
Walnut Creek, CA 94598
Phone (866) 678-4320

2637 Shadelands Dr
Walnut Creek, CA 94598
Phone (925) 627-3424

365 Lennon Ln
Ste 250
Walnut Creek, CA 94598
Phone (925) 627-3424

460 N Wiget Ln
#A
Walnut Creek, CA 94598
Phone (925) 210-8400

460 N Wiget Ln
#B
Walnut Creek, CA 94598
Phone (925) 378-4500

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1169596800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1733097600000",
    "number": "1669527164",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7793",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941207793",
            "telephone_number": "503-372-2740"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1601 YGNACIO VALLEY RD",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945983122",
            "telephone_number": "925-939-3000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2637 Shadelands Dr",
            "address_purpose": "LOCATION",
            "city": "Walnut Creek",
            "state": "CA",
            "postal_code": "945982512",
            "country_code": "US",
            "telephone_number": "925-627-3424",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHOI",
        "first_name": "YUN SOK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-24",
        "last_updated": "2024-12-02",
        "certification_date": "2024-12-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "G75578",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "RANDALL",
            "last_name": "CHOI",
            "middle_name": "YUN SOK",
            "credential": "MD",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

Other providers in Walnut Creek, CA

Sources for this page

Verify at the official NPI Registry.