Gastroenterology Doctors in Saint Charles, MO Accepting Medicare

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4 Gastroenterology doctors found. Showing 1 - 4
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Lawrence Stephen Tierney, M.D.
Internal Medicine - Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 400 1st Capitol Dr Ste 201, Saint Charles, MO 63301
Phone: 636-669-2332    
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Dr. Hari H Diwakaran, M.D.
Internal Medicine - Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 400 1st Capitol Dr Ste 201, Saint Charles, MO 63301
Phone: 636-669-2332    Fax: 636-669-2401
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Dr. Marin I Marcu, M.D.
Internal Medicine - Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 400 1st Capitol Dr, Suite 201, Saint Charles, MO 63301
Phone: 636-669-2332    Fax: 636-669-2401
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Martin P. Altman, M.D.
Internal Medicine - Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 400 1st Capitol Dr, Suite 201, Saint Charles, MO 63301
Phone: 636-669-2332    Fax: 636-669-2401

Gastroenterology: An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.


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.