Dr Marc Demyun, MD - Medicare General Practice in Greenville, TX

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Dr Marc Demyun, MD is a medicare enrolled "Internal Medicine" physician in Greenville, Texas. He graduated from medical school in 1996 and has 29 years of diverse experience with area of expertise as General Practice. He is a member of the group practice Hospitalist Medicine Physicians Of Texas - Burnet Pllc, Hunt Memorial Hospital District, Texas Health And Therapy Centers and his current practice location is 4001 Ridgecrest Rd Ste A, Greenville, Texas. You can reach out to his office (for appointments etc.) via phone at (903) 453-2850.

Dr Marc Demyun is licensed to practice in Texas (license number P8236) 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 1952366684.

Contact Information

Dr Marc Demyun, MD
4001 Ridgecrest Rd Ste A,
Greenville, TX 75402-6143
(903) 453-2850
(903) 453-2859

Map and Direction




Physician's Profile

Full NameDr Marc Demyun
GenderMale
SpecialityGeneral Practice
Experience29 Years
Location4001 Ridgecrest Rd Ste A, Greenville, Texas
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:
  • Dr Marc Demyun graduated from medical school in 1996
  NPI Data:
  • NPI Number: 1952366684
  • Provider Enumeration Date: 04/18/2006
  • Last Update Date: 09/08/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 1254460942
  • Enrollment ID: I20140206000150

Medical Identifiers

Medical identifiers for Dr Marc Demyun such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1952366684NPI-NPPES
P8236OtherTXTEXAS LICENSE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine P8236 (Texas)Primary
207Q00000XFamily Medicine P8236 (Texas)Secondary
207R00000XInternal Medicine 17980 (Mississippi)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Heart To Heart Hospice Of North Texas LlcSherman, TXHospice
Hunt Regional Medical CenterGreenville, TXHospital
Texoma Medical CenterDenison, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Hospitalist Medicine Physicians Of Texas - Burnet Pllc185083163739
Hunt Memorial Hospital District640676893640
Texas Health And Therapy Centers75173382215

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. Dr Marc Demyun allows following entities to bill medicare on his behalf.
Entity NameHunt Memorial Hospital District
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1598750721
PECOS PAC ID: 6406768936
Enrollment ID: O20040424000352
Entity NameWestern Texas Emergency Physicians Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184674020
PECOS PAC ID: 1759303613
Enrollment ID: O20051220000946
Entity NameQuestcare Hospitalists Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265441620
PECOS PAC ID: 5799785119
Enrollment ID: O20070109000581
Entity NameMedconmd1 Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1811437841
PECOS PAC ID: 2466739776
Enrollment ID: O20170515000538
Entity NameTexas Health And Therapy Centers
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1124742580
PECOS PAC ID: 7517338221
Enrollment ID: O20230117001112
Entity NameHospitalist Medicine Physicians Of Texas - Burnet Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265275887
PECOS PAC ID: 1850831637
Enrollment ID: O20240906003572

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 Marc Demyun 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 Marc Demyun, MD
2810 E Trinity Mills Rd Ste 130,
Carrollton, TX 75006-2339

Ph: (972) 417-1936		Dr Marc Demyun, MD
4001 Ridgecrest Rd Ste A,
Greenville, TX 75402-6143

Ph: (903) 453-2850

Reviews and Comments


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Dr. Hassan Farooq, M.D.
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Dr. Khaldun M Khatib, M.D., PH.D.
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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).

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.