Douglas Long Nguyen, MD - Medicare Gastroenterology in Mission Viejo, CA

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Douglas Long Nguyen, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Mission Viejo, California. He went to Cincinnati College Of Medicine And Surgery and graduated in 2008 and has 16 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Faculty Physicians And Surgeons Of Llusm, Providence Medical Foundation and his current practice location is 27799 Medical Center Rd Ste 310, Mission Viejo, California. You can reach out to his office (for appointments etc.) via phone at (949) 364-5090.

Douglas Long Nguyen is licensed to practice in California (license number A113814) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1184880114.

Contact Information

Douglas Long Nguyen, MD
27799 Medical Center Rd Ste 310,
Mission Viejo, CA 92691-6400
(949) 364-5090
Not Available

Map and Direction




Physician's Profile

Full NameDouglas Long Nguyen
GenderMale
SpecialityGastroenterology
Experience16 Years
Location27799 Medical Center Rd Ste 310, Mission Viejo, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Douglas Long Nguyen attended and graduated from Cincinnati College Of Medicine And Surgery in 2008
  NPI Data:
  • NPI Number: 1184880114
  • Provider Enumeration Date: 07/30/2008
  • Last Update Date: 05/12/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 5698811230
  • Enrollment ID: I20121114000034

Medical Identifiers

Medical identifiers for Douglas Long Nguyen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1184880114NPI-NPPES
ENROLLEDMedicaidMN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A113814 (California)Secondary
207RG0100XInternal Medicine - Gastroenterology A113814 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mission Hospital Regional Med CenterMission viejo, CAHospital
Loma Linda University Medical CenterLoma linda, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Faculty Physicians And Surgeons Of Llusm11532278141053
Providence Medical Foundation89219932051293

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. Douglas Long Nguyen allows following entities to bill medicare on his behalf.
Entity NameFaculty Physicians And Surgeons Of Llusm
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205009917
PECOS PAC ID: 1153227814
Enrollment ID: O20031211000981
Entity NameProvidence Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285890624
PECOS PAC ID: 8921993205
Enrollment ID: O20040216001346
Entity NameSac Health System
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013935923
PECOS PAC ID: 4385533579
Enrollment ID: O20040315000608
Entity NameFaculty Physicians And Surgeons Of Llusm
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1508255175
PECOS PAC ID: 1153227814
Enrollment ID: O20160216002196

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. Douglas Long 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
Douglas Long Nguyen, MD
27799 Medical Center Rd Ste 310,
Mission Viejo, CA 92691-6400

Ph: (949) 364-5090		Douglas Long Nguyen, MD
27799 Medical Center Rd Ste 310,
Mission Viejo, CA 92691-6400

Ph: (949) 364-5090

Reviews and Comments


Internal Medicine Doctors in Mission Viejo, CA

Amy Thu Bui, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy, Suite 230, Mission Viejo, CA 92691
Phone: 949-542-8004    Fax: 949-364-3682
Michael Pm Truong, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy, Suite 230, Mission Viejo, CA 92691
Phone: 949-364-3330    Fax: 949-364-3682
Erene Nawar Sami, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy Ste 485, Mission Viejo, CA 92691
Phone: 949-364-5830    
Dr. Paul A Wehrle, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 26800 Crown Valley Pkwy., Suite 100, Mission Viejo, CA 92691
Phone: 949-364-6000    Fax: 949-364-1647
Dr. Brett Michael Wertman, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 27800 Medical Center Rd, Suite 222, Mission Viejo, CA 92691
Phone: 949-276-2446    Fax: 949-276-2449
Dr. Eric Olson Benner, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 26800 Crown Valley Pkwy Ste 315, Mission Viejo, CA 92691
Phone: 949-364-6000    Fax: 949-364-1204
Dr. Richard Jacob, M.D.
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 26800 Crown Valley Pkwy, Suite 250, Mission Viejo, CA 92691
Phone: 949-364-3570    Fax: 949-364-3430

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.