Dr Mark M Allendorph, MD - Medicare Internal Medicine in Alton, IL

Dr Mark M Allendorph, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Alton, Illinois. His current practice location is 2 Memorial Dr, Suite 205, Alton, Illinois. You can reach out to his office (for appointments etc.) via phone at (618) 465-5849.

Dr Mark M Allendorph is licensed to practice in Illinois (license number 036072597) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1922094002.

Contact Information

Dr Mark M Allendorph, MD
2 Memorial Dr, Suite 205,
Alton, IL 62002-6723
(618) 465-5849
(618) 465-5853

Map and Direction




Physician's Profile

Full NameDr Mark M Allendorph
GenderMale
SpecialityInternal Medicine - Gastroenterology
Location2 Memorial Dr, Alton, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1922094002
  • Provider Enumeration Date: 09/23/2005
  • Last Update Date: 05/27/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 2062586225
  • Enrollment ID: I20080806000158

Medical Identifiers

Medical identifiers for Dr Mark M Allendorph such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1922094002NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 036072597 (Illinois)Primary

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. Dr Mark M Allendorph 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
Dr Mark M Allendorph, MD
2 Memorial Dr, Suite 205,
Alton, IL 62002-6723

Ph: (618) 465-5849
Dr Mark M Allendorph, MD
2 Memorial Dr, Suite 205,
Alton, IL 62002-6723

Ph: (618) 465-5849

Reviews and Comments


Internal Medicine Doctors in Alton, IL

Ibrahim B.i. Elayyan, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 1 Saint Anthonys Way, Alton, IL 62002
Phone: 314-317-0600    Fax: 314-317-0606
Dr. Barry Michael Mossman, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2 Memorial Dr, Ste 220, Alton, IL 62002
Phone: 618-474-1723    Fax: 618-474-6989
Dr. Matthew Austin Nations, D.O.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1 Memorial Dr, Alton, IL 62002
Phone: 618-463-7240    
Mr. David Robert Riedel, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 4 Memorial Dr Ste 230, Alton, IL 62002
Phone: 618-463-7874    Fax: 618-463-7846
Dr. Stanley J Sidwell Iv, MD
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 1 Memorial Dr, Alton, IL 62002
Phone: 618-463-7240    Fax: 618-463-7216
Dr. Edward B Blair Jr., M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 2 Saint Anthonys Way, Suite 205, Alton, IL 62002
Phone: 618-462-2222    Fax: 618-463-5004
Dr. William Ray Bartley, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1 Professional Dr, Suite 220, Alton, IL 62002
Phone: 618-463-8626    Fax: 618-463-8688

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.