Thomas P Hsia, MD - Medicare Gastroenterology in Santa Maria, CA

Thomas P Hsia, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Santa Maria, California. He graduated from medical school in 1987 and has 37 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Santa Maria Gastroenterology Medical Group Inc. and his current practice location is 361 Town Center West Suite 101, Santa Maria, California. You can reach out to his office (for appointments etc.) via phone at (805) 922-6581.

Thomas P Hsia is licensed to practice in California (license number G060975) 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 1508894486.

Contact Information

Thomas P Hsia, MD
361 Town Center West Suite 101,
Santa Maria, CA 93458
(805) 922-6581
(805) 348-3217

Map and Direction




Physician's Profile

Full NameThomas P Hsia
GenderMale
SpecialityGastroenterology
Experience37 Years
Location361 Town Center West Suite 101, Santa Maria, 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:
  • Thomas P Hsia graduated from medical school in 1987
  NPI Data:
  • NPI Number: 1508894486
  • Provider Enumeration Date: 06/29/2006
  • Last Update Date: 06/02/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 9436062395
  • Enrollment ID: I20081024000223

Medical Identifiers

Medical identifiers for Thomas P Hsia such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1508894486NPI-NPPES
00G609751MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology G060975 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Marian Regional Medical CenterSanta maria, CAHospital
French Hospital Medical CenterSan luis obispo, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Santa Maria Gastroenterology Medical Group Inc.670907096420

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. Thomas P Hsia allows following entities to bill medicare on his behalf.
Entity NameSanta Maria Gastroenterology Medical Group Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1386971687
PECOS PAC ID: 6709070964
Enrollment ID: O20101101001401

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. Thomas P Hsia 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
Thomas P Hsia, MD
361 Town Center West Suite 101,
Santa Maria, CA 93458

Ph: (805) 922-6581
Thomas P Hsia, MD
361 Town Center West Suite 101,
Santa Maria, CA 93458

Ph: (805) 922-6581

Reviews and Comments


Internal Medicine Doctors in Santa Maria, CA

Dr. Paul A Lussier, D.O.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 117 W Bunny Ave, Santa Maria, CA 93458
Phone: 805-739-3890    Fax: 805-347-7697
Mr. Muthiyaliah Babu, M.D.
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 1401 E Main St, Santa Maria, CA 93454
Phone: 805-349-0198    Fax: 805-349-9004
Wei Bai, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1325 E Church St Ste 301, Santa Maria, CA 93454
Phone: 805-349-9393    Fax: 805-349-1155
Dr. Siri Atma Singh Khalsa, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1400 E Church St, Santa Maria, CA 93454
Phone: 805-739-3215    
Dr. Barry Steven Feldman, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1400 E Church St, Santa Maria, CA 93454
Phone: 805-739-3000    Fax: 970-667-0847
Dr. Jose Jumil Yongco, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2115 Centerpointe Pkwy, Santa Maria, CA 93455
Phone: 805-346-7230    Fax: 805-346-7272
Dr. Eric William Jahnke Sr., MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 361 Town Center West Suite 101, Santa Maria, CA 93458
Phone: 805-922-6581    Fax: 805-922-7052

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.