Dr Ythanh Duy Nguyen, MD - Medicare Internal Medicine in Upland, CA

Dr Ythanh Duy Nguyen, MD is a medicare enrolled "Hospitalist" physician in Upland, California. She graduated from medical school in 2002 and has 22 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Premier Hospitalist Group Inc, Premier Medical Group Of California and her current practice location is 999 San Bernardino Rd, San Antonio Community Hospital, Upland, California. You can reach out to her office (for appointments etc.) via phone at (562) 236-3432.

Dr Ythanh Duy Nguyen is licensed to practice in California (license number A84989) 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 1255391181.

Contact Information

Dr Ythanh Duy Nguyen, MD
999 San Bernardino Rd, San Antonio Community Hospital,
Upland, CA 91786-4920
(562) 236-3432
(909) 944-5904

Map and Direction




Physician's Profile

Full NameDr Ythanh Duy Nguyen
GenderFemale
SpecialityInternal Medicine
Experience22 Years
Location999 San Bernardino Rd, Upland, 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:
  • Dr Ythanh Duy Nguyen graduated from medical school in 2002
  NPI Data:
  • NPI Number: 1255391181
  • Provider Enumeration Date: 03/24/2006
  • Last Update Date: 07/19/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 4688603236
  • Enrollment ID: I20050804000570

Medical Identifiers

Medical identifiers for Dr Ythanh Duy Nguyen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1255391181NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A84989 (California)Secondary
208M00000XHospitalist A84989 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
San Antonio Regional HospitalUpland, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Premier Hospitalist Group Inc39717365963
Premier Medical Group Of California41839098492

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. Dr Ythanh Duy Nguyen allows following entities to bill medicare on her behalf.
Entity NamePremier Hospitalist Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1619216553
PECOS PAC ID: 3971736596
Enrollment ID: O20140507000114
Entity NamePremier Medical Group Of California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629523014
PECOS PAC ID: 4183909849
Enrollment ID: O20170320001134

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. Dr Ythanh Duy Nguyen 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
Dr Ythanh Duy Nguyen, MD
8816 Foothill Blvd Ste 103,
Rancho Cucamonga, CA 91730-7199

Ph: (909) 579-6753
Dr Ythanh Duy Nguyen, MD
999 San Bernardino Rd, San Antonio Community Hospital,
Upland, CA 91786-4920

Ph: (562) 236-3432

Reviews and Comments


Hospitalist Doctors in Upland, CA


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.