Abhishek Kumar, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

A195171 Issued in CA

Practice address

18000 Studebaker Rd Ste 800
Cerritos, CA 90703-2671

Phone

(562) 735-3226

Fax

(833) 438-9659

NPI assigned

Mar 26, 2020

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

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

Specialty

Radiation Oncology

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

The Oncology Institute Ca, a Professional CorporationGroup PAC ID 5698872398, 114 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: abhishek.kumar@theoncologyinstitute.ikm.direct-ci.com

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.

• The Oncology Institute Ca, a Professional Corporation

  • Hematology & Oncology Physician
  • Downey, CA
  • NPI 1275651515

  Radiation Oncology

  Medicare reassignment Care Compare group NPD
• Starling Oncology Ca, a Professional Corporation

  • Hematology & Oncology Physician
  • Las Vegas, NV
  • NPI 1225514508
  NPD
• To

  • Pharmacy
  • Westminster, CA
  • NPI 1689440836
  NPD (past)
• Toi Management, LLC

  • Pharmacy
  • Westminster, CA
  • NPI 1316029192
  NPD (past)

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

{
    "created_epoch": "1585180800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753660800000",
    "number": "1043847114",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18000 STUDEBAKER RD STE 800",
            "city": "CERRITOS",
            "state": "CA",
            "postal_code": "907032671",
            "telephone_number": "562-735-3226",
            "fax_number": "833-438-9659"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18000 STUDEBAKER RD STE 800",
            "city": "CERRITOS",
            "state": "CA",
            "postal_code": "907032671",
            "telephone_number": "562-735-3226",
            "fax_number": "833-438-9659"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "15262 Goldenwest St",
            "address_purpose": "LOCATION",
            "city": "Westminster",
            "state": "CA",
            "postal_code": "926836169",
            "country_code": "US",
            "telephone_number": "714-430-3865",
            "fax_number": "833-412-0480",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KUMAR",
        "first_name": "ABHISHEK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-26",
        "last_updated": "2025-07-28",
        "certification_date": "2025-07-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "NC",
            "license": "RTL21-1087",
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CA",
            "license": "A195171",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Helene Koueteu
• Philip Isaac Kress, D.M.D.
• I Wen Ku
• Sonja Kuburovich, LMFT
• Enrique Kukahiko
• Iryanthi Kurniadi, R.D.
• Brayden Kuypers
• Da Yeon Kwon, LMFT
• Ohun Kwon, DC
• Phoebe La Montree, CASE MANAGER

• Radiation Oncology Physician in Cerritos, CA
• Providers in Cerritos, CA by specialty
• Radiation Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 28, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• 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.