NPIMap

Individual provider Active NPI

Katy Chien-Chien Young-Lee, MD

  • Internal Medicine Physician
  • Emeryville, CA
National Provider Identifier
1841259173
Registry record updated Mar 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
A73200 Issued in CA
Practice address
5800 Hollis St
Emeryville, CA 94608-2016
Phone
(510) 806-2100
NPI assigned
Mar 23, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 19, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X A73200 CA Primary

Addresses

Primary practice location

5800 Hollis St
Emeryville, CA 94608-2016

Mailing address

5800 Hollis St
Emeryville, CA 94608-2016
Phone (510) 806-2100

Other practice location 1

3100 Telegraph Ave # 2000
Oakland, CA 94609-3239
Phone (510) 204-8290

Other names 1

  • Katy C Young Former name

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20100804000430 CA Practitioner - Internal Medicine 1759419146 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Vermont College of Medicine, 1999
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Sutter Bay Medical FoundationGroup PAC ID 4284538778, 3,783 clinicians

Practice addresses (Care Compare)

3100 Telegraph Ave
Oakland, CA 94609-3239
Phone (510) 204-8290

3200 Kearney St
Fremont, CA 94538-2299
Phone (510) 490-1222

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
A73200CAMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Sutter Bay Medical Foundation CurrentSince Mar 9, 2026 Accepting new patients
University Healthcare Alliance Internal Medicine CurrentSince May 1, 2013 Accepting new patients
Stanford Health Care Internal Medicine CurrentSince Jun 29, 2019 Accepting new patients
Stanford Health Care CurrentSince Jun 29, 2019 Accepting new patients
Sutter Bay Medical Foundation CurrentSince Mar 9, 2026 Accepting new patients
Stanford Hospital and Clinics Past Accepting new patients
Alta Bates Summit Medical Center Past Accepting new patients
Sutter Bay Hospitals Past Accepting new patients

Locations

6121 Hollis St
Ste 400
Emeryville, CA 94608
Phone (510) 266-5400

5800 Hollis St
Emeryville, CA 94608
Phone (510) 806-2100

1300 Crane St
Menlo Park, CA 94025
Phone (510) 785-5000

350 30th St
Ste 320
Oakland, CA 94609
Phone (510) 465-6700

3100 Telegraph Ave
#2000
Oakland, CA 94609
Phone (510) 204-8290

4725 1st St
Ste 100
Pleasanton, CA 94566
Phone (925) 462-7060

300 Pasteur Dr
Stanford, CA 94305
Phone (650) 498-5710

Interoperability endpoints

  • Direct secure messaging: kyounglee78467@direct.stanfordhealthcare.org

Organizations & group practices 8

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 14

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

View all 14

NPI Registry JSON

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

{
    "created_epoch": "1143072000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773878400000",
    "number": "1841259173",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5800 HOLLIS ST",
            "city": "EMERYVILLE",
            "state": "CA",
            "postal_code": "946082016",
            "telephone_number": "510-806-2100"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5800 HOLLIS ST",
            "city": "EMERYVILLE",
            "state": "CA",
            "postal_code": "946082016",
            "telephone_number": "510-806-2100"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3100 Telegraph Ave # 2000",
            "address_purpose": "LOCATION",
            "city": "Oakland",
            "state": "CA",
            "postal_code": "946093239",
            "country_code": "US",
            "telephone_number": "510-204-8290",
            "fax_number": "510-903-9037",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "YOUNG-LEE",
        "first_name": "KATY",
        "middle_name": "CHIEN-CHIEN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-03-23",
        "last_updated": "2026-03-19",
        "certification_date": "2026-03-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A73200",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "KATY",
            "last_name": "YOUNG",
            "middle_name": "C",
            "credential": "MD",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Emeryville, CA

Sources for this page

Verify at the official NPI Registry.