Theodore Sy, MD - Medicare Gastroenterology in Laguna Hills, CA

Theodore Sy, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Laguna Hills, California. He went to Northwestern University Feinberg Medical School and graduated in 2003 and has 21 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Memorialcare Medical Foundation and his current practice location is 26538 Moulton Pkwy Ste 38e, Laguna Hills, California. You can reach out to his office (for appointments etc.) via phone at (949) 448-0656.

Theodore Sy is licensed to practice in California (license number A90266) 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 1003865627.

Contact Information

Theodore Sy, MD
26538 Moulton Pkwy Ste 38e,
Laguna Hills, CA 92653
(949) 448-0656
Not Available

Map and Direction




Physician's Profile

Full NameTheodore Sy
GenderMale
SpecialityGastroenterology
Experience21 Years
Location26538 Moulton Pkwy Ste 38e, Laguna Hills, 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:
  • Theodore Sy attended and graduated from Northwestern University Feinberg Medical School in 2003
  NPI Data:
  • NPI Number: 1003865627
  • Provider Enumeration Date: 05/09/2006
  • Last Update Date: 02/07/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 7911905989
  • Enrollment ID: I20061129000547

Medical Identifiers

Medical identifiers for Theodore Sy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1003865627NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine A90266 (California)Secondary
207RG0100XInternal Medicine - Gastroenterology A90266 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Memorialcare Saddleback Medical CenterLaguna hills, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Memorialcare Medical Foundation8729277314382

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. Theodore Sy allows following entities to bill medicare on his behalf.
Entity NameMemorialcare Medical Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205167350
PECOS PAC ID: 8729277314
Enrollment ID: O20110113000219

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. Theodore Sy 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
Theodore Sy, MD
26538 Moulton Pkwy Ste 38e,
Laguna Hills, CA 92653-8232

Ph: () -
Theodore Sy, MD
26538 Moulton Pkwy Ste 38e,
Laguna Hills, CA 92653

Ph: (949) 448-0656

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.