Individual provider Active NPI

Jenny F Jew, M.D.

  • Gastroenterology Physician
  • Concord, CA
National Provider Identifier
1356504476
Registry record updated Aug 27, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Gastroenterology PhysicianTaxonomy code 207RG0100X
License
A110315 Issued in CA
Practice address
2222 East St Ste 300
Concord, CA 94520-2066
Phone
(925) 682-7730
NPI assigned
Jul 9, 2008
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Aug 27, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Gastroenterology Physician 207RG0100X A110315 CA Primary

Addresses

Primary practice location

2222 East St Ste 300
Concord, CA 94520-2066

Mailing address

3903 Lone Tree Way
Ste 205
Antioch, CA 94509-6249
Phone (925) 754-8710

Other names 1

  • Jenny F Lai Former 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
I20140715002444 CA Practitioner - Gastroenterology 1759506314 Reassigns benefits to 1 organization
Practice locations: Antioch, CA; Walnut Creek, CA; Concord, CA; Brentwood, CA

Care Compare profile

Medicare Care Compare
Specialty
Gastroenterology
Education
Boston University School of Medicine, 2008
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Bass Medical GroupGroup PAC ID 9032111281, 292 clinicians

Practice addresses (Care Compare)

1505 Saint Alphonsus Way
Alamo, CA 94507-1570
Phone (925) 932-6330

2222 E St
Suite 300
Concord, CA 94520-2066
Phone (925) 932-6330

2637 Shadelands Dr
Walnut Creek, CA 94598-2512
Phone (925) 378-4512

365 Lennon LN
Walnut Creek, CA 94598-5915

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
90.98 of 100Reported as apm
Quality
80.39
Promoting interoperability
100
Improvement activities
40

Procedures performed for Medicare patients

ProcedureNumber of procedures
Colonoscopy230
Upper gastrointestinal (GI) endoscopy for acid reflux128

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
110315CAMDGeneral Practice Dentistry
A110315CAMDGastroenterology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Bass Medical Group CurrentSince Jan 1, 2015 Accepting new patients
Bass Medical Group CurrentSince Jan 1, 2015 Accepting new patients
Bass Medical Group Current Accepting new patients
Brentwood Surgery Center, LLC Past Accepting new patients
Dennis Zai, M.D., Inc Gastroenterology Past Accepting new patients

Locations

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

3903 Lone Tree Way
Ste 205
Antioch, CA 94509
Phone (925) 754-8710

4721 Dallas Ranch Rd
Antioch, CA 94531
Phone (925) 676-2600

2400 Balfour Rd
Ste 320
Brentwood, CA 94513
Phone (925) 240-2059

350 John Muir Pkwy
Ste 245
Brentwood, CA 94513
Phone (925) 240-2101

2540 East St
Concord, CA 94520
Phone (925) 674-2228

2222 East St
Ste 300
Concord, CA 94520
Phone (925) 676-2942

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

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

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: jjew33375@ehr.johnmuirhealth.com

Organizations & group practices 5

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 3

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": "1215561600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787788800000",
    "number": "1356504476",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3903 LONE TREE WAY",
            "address_2": "STE 205",
            "city": "ANTIOCH",
            "state": "CA",
            "postal_code": "945096249",
            "telephone_number": "925-754-8710"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2222 EAST ST STE 300",
            "city": "CONCORD",
            "state": "CA",
            "postal_code": "945202066",
            "telephone_number": "925-682-7730"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "JEW",
        "first_name": "JENNY",
        "middle_name": "F",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2008-07-09",
        "last_updated": "2026-08-27",
        "certification_date": "2026-08-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "CA",
            "license": "A110315",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "JENNY",
            "last_name": "LAI",
            "middle_name": "F",
            "credential": "M.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Concord, CA

Sources for this page

Verify at the official NPI Registry.