NPIMap

Individual provider Active NPI

Isabella Geneva Chen, M.D.

  • Hematology & Oncology Physician
  • Ventura, CA
National Provider Identifier
1053621730
Registry record updated Sep 29, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology & Oncology PhysicianTaxonomy code 207RH0003X
License
A118096 Issued in CA
Practice address
300 Hillmont Ave
BLDG 340, Ste 501
Ventura, CA 93003
Phone
(805) 652-6218
Fax
(805) 652-6512
NPI assigned
Oct 15, 2010
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 29, 2025

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

Specialties & licenses 5

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology (Internal Medicine) Physician 207RH0000X A118096 CA
Medical Oncology Physician 207RX0202X A118096 CA
Hematology & Oncology Physician 207RH0003X A118096 CA Primary
Internal Medicine Physician 207R00000X A118096 CA
Student in an Organized Health Care Education/Training Program 390200000X

Addresses

Primary practice location

300 Hillmont Ave
BLDG 340, Ste 501
Ventura, CA 93003

Mailing address

800 S Victoria Ave, L4615
Vchca - Physician Services
Ventura, CA 93009-0003
Phone (805) 677-5181

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address isabella.chen@ventura.cernerdirect.com Direct

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
I20161005001991 CA Practitioner - Internal MedicinePractitioner - Medical Oncology 5890948822 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal MedicineAlso: Medical Oncology
Education
Jefferson Medical College of Thomas Jefferson University, 2010
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
County of VenturaGroup PAC ID 7911810171, 340 clinicians

Practice addresses (Care Compare)

300 Hillmont Ave
Ventura, CA 93003-1651

Hospital & facility affiliations

  • Ventura County Medical Center Hospital, Ventura, CA, CCN 050159
  • Community Memorial Hospital - Ventura Hospital, Ventura, CA, CCN 050394
  • Community Memorial Hospital - Ojai Hospital, Ojai, CA, CCN 051334

Merit-based Incentive Payment System (MIPS)

Final score
86.02 of 100Reported as group
Quality
64.51
Promoting interoperability
100
Improvement activities
40
Cost
72.21

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
County of Ventura Current Accepting new patients
Community Memorial Health System Current Accepting new patients
County of Ventura CurrentSince Sep 1, 2016 Accepting new patients
Community Memorial Health System CurrentSince Oct 1, 2025 Accepting new patients
Community Memorial Health System CurrentSince Oct 1, 2025 Accepting new patients
County of Ventura CurrentSince Sep 1, 2016 Accepting new patients
Community Medical Center, Inc. Past Accepting new patients
Scripps Clinic Medical Group, Inc Past Accepting new patients
County of Ventura Past Accepting new patients

Locations

422 Arneill Rd
Ste B
Camarillo, CA 93010
Phone (805) 383-4510

2921 Saviers Rd
Oxnard, CA 93033
Phone (805) 487-5588

300 Hillmont Ave
Ventura, CA 93003
Phone (805) 652-6000

147 N Brent St
Ventura, CA 93003
Phone (805) 652-5011

3291 Loma Vista Rd
Bldg 340
Ventura, CA 93003
Phone (805) 652-6218

138 W Main St
Ste E
Ventura, CA 93001
Phone (805) 667-2850

5855 Olivas Park Dr
Ventura, CA 93003
Phone (805) 652-5469

800 S Victoria Ave
#L4640
Ventura, CA 93009

2900 Loma Vista Rd
Ste 205
Ventura, CA 93003
Phone (805) 570-7799

300 Hillmont Ave
Ste 501
Ventura, CA 93003
Phone (805) 652-6218

300 Hillmont Ave
Bldg 340
Ventura, CA 93003
Phone (805) 652-6100

3291 Loma Vista Rd
Ventura, CA 93003
Phone (805) 652-6000

800 S Victoria Ave
#L4615
Ventura, CA 93009
Phone (805) 677-5181

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: ichen4080807@oc.providencedirect.org

Organizations & group practices 9

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 12

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": "1287100800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759104000000",
    "number": "1053621730",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "800 S VICTORIA AVE, L4615",
            "address_2": "VCHCA - PHYSICIAN SERVICES",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "930090003",
            "telephone_number": "805-677-5181",
            "fax_number": "805-677-5304"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 HILLMONT AVE",
            "address_2": "BLDG 340, STE 501",
            "city": "VENTURA",
            "state": "CA",
            "postal_code": "93003",
            "telephone_number": "805-652-6218",
            "fax_number": "805-652-6512"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHEN",
        "first_name": "ISABELLA",
        "middle_name": "GENEVA",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2010-10-15",
        "last_updated": "2025-09-29",
        "certification_date": "2025-09-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "CA",
            "license": "A118096",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "CA",
            "license": "A118096",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "A118096",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A118096",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "isabella.chen@ventura.cernerdirect.com",
            "affiliation": "N",
            "endpointDescription": "Cerner Direct Secure Email",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Direct Information",
            "address_1": "300 Hillmont Ave",
            "address_2": "Bldg 340, Ste 501",
            "city": "Ventura",
            "state": "CA",
            "country_code": "US",
            "postal_code": "93003",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Ventura, CA

Sources for this page

Verify at the official NPI Registry.