Leslie Ballas, MD - Medicare Radiation Oncology in Los Angeles, CA

Leslie Ballas, MD is a medicare enrolled "Radiology - Radiation Oncology" physician in Los Angeles, California. She went to University Of Michigan Medical School and graduated in 2003 and has 21 years of diverse experience with area of expertise as Radiation Oncology. She is a member of the group practice Cedars-sinai Medical Center and her current practice location is 1441 Eastlake Ave, Nor G-350, Los Angeles, California. You can reach out to her office (for appointments etc.) via phone at (323) 865-3050.

Leslie Ballas is licensed to practice in California (license number A111990) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1235388901.

Contact Information

Leslie Ballas, MD
1441 Eastlake Ave, Nor G-350,
Los Angeles, CA 90089-0112
(323) 865-3050
(323) 865-3000

Map and Direction




Physician's Profile

Full NameLeslie Ballas
GenderFemale
SpecialityRadiation Oncology
Experience21 Years
Location1441 Eastlake Ave, Los Angeles, California
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Leslie Ballas attended and graduated from University Of Michigan Medical School in 2003
  NPI Data:
  • NPI Number: 1235388901
  • Provider Enumeration Date: 09/17/2008
  • Last Update Date: 07/14/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8426182239
  • Enrollment ID: I20110914000090

Medical Identifiers

Medical identifiers for Leslie Ballas such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1235388901NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0001XRadiology - Radiation Oncology A111990 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Cedars-sinai Medical CenterLos angeles, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Cedars-sinai Medical Center0446169114651

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Leslie Ballas allows following entities to bill medicare on her behalf.
Entity NameCedars-sinai Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1639172372
PECOS PAC ID: 0446169114
Enrollment ID: O20040204000886
Entity NameUsc Care Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1902846306
PECOS PAC ID: 0446157747
Enrollment ID: O20050512000412

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Leslie Ballas is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Leslie Ballas, MD
4140 W 190th St,
Torrance, CA 90504-5513

Ph: () -
Leslie Ballas, MD
1441 Eastlake Ave, Nor G-350,
Los Angeles, CA 90089-0112

Ph: (323) 865-3050

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.