Louis Cai, - Medicare Ophthalmology in Sunnyvale, CA

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Louis Cai, is a medicare enrolled "Ophthalmology" physician in Sunnyvale, California. He went to University Of Miami, Lm Miller School Of Medicine and graduated in 2018 and has 8 years of diverse experience with area of expertise as Ophthalmology. His current practice location is 1210 E Arques Ave Ste 210, Sunnyvale, California. You can reach out to his office (for appointments etc.) via phone at (408) 540-3559.

Louis Cai is licensed to practice in Florida (license number ME154746) 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 1194220632.

Contact Information

Louis Cai,
1210 E Arques Ave Ste 210,
Sunnyvale, CA 94085-5422
(408) 540-3559
(408) 418-2803

Map and Direction




Physician's Profile

Full NameLouis Cai
GenderMale
SpecialityOphthalmology
Experience8 Years
Location1210 E Arques Ave Ste 210, Sunnyvale, 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:
  • Louis Cai attended and graduated from University Of Miami, Lm Miller School Of Medicine in 2018
  NPI Data:
  • NPI Number: 1194220632
  • Provider Enumeration Date: 03/27/2018
  • Last Update Date: 10/14/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 8729314034
  • Enrollment ID: I20240717001561

Medical Identifiers

Medical identifiers for Louis Cai such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194220632NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207WX0107XOphthalmology - Retina Specialist A194964 (California)Secondary
207W00000XOphthalmology ME154746 (Florida)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Good Samaritan HospitalSan jose, CAHospital

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. Louis Cai allows following entities to bill medicare on his behalf.
Entity NameLouis Cai MD Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184560047
PECOS PAC ID: 2961974043
Enrollment ID: O20260619000784

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. Louis Cai 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
Louis Cai,
1210 E Arques Ave Ste 210,
Sunnyvale, CA 94085-5422

Ph: (408) 540-3559		Louis Cai,
1210 E Arques Ave Ste 210,
Sunnyvale, CA 94085-5422

Ph: (408) 540-3559

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).

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