Lydia Esther Villanueva, MD - Medicare Internal Medicine in Fontana, CA

Lydia Esther Villanueva, MD is a medicare enrolled "Internal Medicine" physician in Fontana, California. She graduated from medical school in 1979 and has 45 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Southern California Permanente Medical Group and her current practice location is 8110 Mango Ave, Fontana, California. You can reach out to her office (for appointments etc.) via phone at (909) 822-1164.

Lydia Esther Villanueva is licensed to practice in California (license number A51183) 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 1972563765.

Contact Information

Lydia Esther Villanueva, MD
8110 Mango Ave,
Fontana, CA 92335-3603
(909) 822-1164
(909) 357-2235

Map and Direction




Physician's Profile

Full NameLydia Esther Villanueva
GenderFemale
SpecialityInternal Medicine
Experience45 Years
Location8110 Mango Ave, Fontana, 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:
  • Lydia Esther Villanueva graduated from medical school in 1979
  NPI Data:
  • NPI Number: 1972563765
  • Provider Enumeration Date: 03/24/2006
  • Last Update Date: 12/21/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 3476524646
  • Enrollment ID: I20080715000940

Medical Identifiers

Medical identifiers for Lydia Esther Villanueva such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1972563765NPI-NPPES
00A4511830MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A51183 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Sacred Heart HospiceRiverside, CAHospice

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Southern California Permanente Medical Group60027291757951

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. Lydia Esther Villanueva allows following entities to bill medicare on her behalf.
Entity NameSouthern California Permanente Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1316979834
PECOS PAC ID: 6002729175
Enrollment ID: O20040126000823

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. Lydia Esther Villanueva 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
Lydia Esther Villanueva, MD
8110 Mango Ave,
Fontana, CA 92335-3603

Ph: (909) 822-1164
Lydia Esther Villanueva, MD
8110 Mango Ave,
Fontana, CA 92335-3603

Ph: (909) 822-1164

Reviews and Comments


Internal Medicine Doctors in Fontana, CA

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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.