Infectious Disease Doctors in Castro Valley, CA Accepting Medicare

  1. Home
  2. Infectious Disease
  3. California
  4. Castro Valley
2 Infectious Disease doctors found. Showing 1 - 2
female doctor icon
Dr. Harkiran K Grewal, MD
Internal Medicine - Infectious Disease
Medicare: Medicare Enrolled
Practice Location: 20400 Lake Chabot Rd Ste 102, Castro Valley, CA 94546
Phone: 202-444-0086    
male doctor icon
Steven Oppenheimer, MD
Internal Medicine - Infectious Disease
Medicare: Not Enrolled in Medicare
Practice Location: 20103 Lake Chabot Rd, Castro Valley, CA 94546
Phone: 510-566-8331    

Infectious Disease: An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.


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.