Alan Chen, MD - Medicare Gastroenterology in Torrance, CA

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Alan Chen, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Torrance, California. He went to Duke University School Of Medicine and graduated in 2014 and has 12 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Medstar Medical Group Ii Llc and his current practice location is 20911 Earl St Ste 220, Torrance, California. You can reach out to his office (for appointments etc.) via phone at (310) 214-7236.

Alan Chen is licensed to practice in California (license number C207362) 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 1033539945.

Contact Information

Alan Chen, MD
20911 Earl St Ste 220,
Torrance, CA 90503-4353
(310) 214-7236
(310) 542-0334

Map and Direction




Physician's Profile

Full NameAlan Chen
GenderMale
SpecialityGastroenterology
Experience12 Years
Location20911 Earl St Ste 220, Torrance, 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:
  • Alan Chen attended and graduated from Duke University School Of Medicine in 2014
  NPI Data:
  • NPI Number: 1033539945
  • Provider Enumeration Date: 04/17/2014
  • Last Update Date: 09/16/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 8729309398
  • Enrollment ID: I20200729001343

Medical Identifiers

Medical identifiers for Alan Chen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033539945NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology D0089536 (Maryland)Secondary
207RG0100XInternal Medicine - Gastroenterology C207362 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Medstar Franklin Square Medical CenterRosedale, MDHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Medstar Medical Group Ii Llc05474138253726

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. Alan Chen allows following entities to bill medicare on his behalf.
Entity NameMedstar Medical Group II LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184046187
PECOS PAC ID: 0547413825
Enrollment ID: O20130117000347

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. Alan Chen 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
Alan Chen, MD
20911 Earl St Ste 220,
Torrance, CA 90503-4353

Ph: (310) 214-7236		Alan Chen, MD
20911 Earl St Ste 220,
Torrance, CA 90503-4353

Ph: (310) 214-7236

Reviews and Comments


Internal Medicine Doctors in Torrance, CA

Dr. Sarah E Tomassetti, M.D.
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Deborah Chon, M.D.
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Erika Joyce Kalash, D.O.
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Dr. Christopher Bryan Mayorga, DO
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Practice Location: 1000 W Carson St Bldg N28, Torrance, CA 90502
Phone: 424-306-4446    
Hosayn Khaleeli, MD
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Practice Location: 2245 Sepulveda Blvd, Torrance, CA 90501
Phone: 310-320-3204    Fax: 310-320-0919
Mr. Anthony C Dike, MD
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Medicare: Medicare Enrolled
Practice Location: 20280 S Vermont Ave Ste 215, Torrance, CA 90502
Phone: 323-434-4626    Fax: 310-693-8082
Paul J Brown, M.D.
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Practice Location: 3333 Skypark Dr, Torrance, CA 90505
Phone: 310-517-9006    

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.