Mark Fesenmyer, MD - Medicare Gastroenterology in Merrillville, IN

Mark Fesenmyer, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Merrillville, Indiana. He went to Indiana University School Of Medicine and graduated in 1991 and has 33 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Community Care Network Inc and his current practice location is 8895 Broadway, Merrillville, Indiana. You can reach out to his office (for appointments etc.) via phone at (219) 738-2081.

Mark Fesenmyer is licensed to practice in Indiana (license number 01072085A) 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 1992770390.

Contact Information

Mark Fesenmyer, MD
8895 Broadway,
Merrillville, IN 46410-7037
(219) 738-2081
(219) 736-4658

Map and Direction




Physician's Profile

Full NameMark Fesenmyer
GenderMale
SpecialityGastroenterology
Experience33 Years
Location8895 Broadway, Merrillville, Indiana
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:
  • Mark Fesenmyer attended and graduated from Indiana University School Of Medicine in 1991
  NPI Data:
  • NPI Number: 1992770390
  • Provider Enumeration Date: 02/20/2006
  • Last Update Date: 05/05/2020
  Medicare PECOS Information:
  • PECOS PAC ID: 7416842810
  • Enrollment ID: I20130429000622

Medical Identifiers

Medical identifiers for Mark Fesenmyer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1992770390NPI-NPPES
000000804383OtherINANTHEM
036105597MedicaidIL
201131780AMedicaidIN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 036105597 (Illinois)Secondary
207RG0100XInternal Medicine - Gastroenterology 01072085A (Indiana)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Mary Medical Center IncHobart, INHospital
St Catherine Hospital IncEast chicago, INHospital
Community HospitalMunster, INHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Community Care Network Inc3678737012360

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. Mark Fesenmyer allows following entities to bill medicare on his behalf.
Entity NameInternal Medicine Associates
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1487685178
PECOS PAC ID: 9133191604
Enrollment ID: O20040806000539
Entity NameCommunity Care Network Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1457610487
PECOS PAC ID: 3678737012
Enrollment ID: O20120614000331

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. Mark Fesenmyer 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
Mark Fesenmyer, MD
8895 Broadway,
Merrillville, IN 46410-7037

Ph: (219) 738-2081
Mark Fesenmyer, MD
8895 Broadway,
Merrillville, IN 46410-7037

Ph: (219) 738-2081

Reviews and Comments


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Larry R Brazley, MD
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Stephanie D Marshall, DO
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Practice Location: 8684 Connecticut St Ste A, Merrillville, IN 46410
Phone: 192-472-8990    Fax: 219-472-0270

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.