Mark Irwin, - Medicare Internal Medicine in Knoxville, TN

Mark Irwin, is a medicare enrolled "Internal Medicine - Infectious Disease" physician in Knoxville, Tennessee. His current practice location is 501 19th St Ste 600, Knoxville, Tennessee. You can reach out to his office (for appointments etc.) via phone at (865) 525-4333.

Mark Irwin is licensed to practice in Tennessee (license number 6170) 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 1104453588.

Contact Information

Mark Irwin,
501 19th St Ste 600,
Knoxville, TN 37916-1852
(865) 525-4333
Not Available

Map and Direction




Physician's Profile

Full NameMark Irwin
GenderMale
SpecialityInternal Medicine - Infectious Disease
Location501 19th St Ste 600, Knoxville, Tennessee
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1104453588
  • Provider Enumeration Date: 03/25/2020
  • Last Update Date: 06/17/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 9133544828
  • Enrollment ID: I20200728003173

Medical Identifiers

Medical identifiers for Mark Irwin such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1104453588NPI-NPPES
Q102113MedicaidTN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RI0200XInternal Medicine - Infectious Disease 6170 (Tennessee)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. Mark Irwin 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 Irwin,
201 19th Street, Suite 600, Trustees Tower,
Knoxville, TN 37916

Ph: (865) 525-4333
Mark Irwin,
501 19th St Ste 600,
Knoxville, TN 37916-1852

Ph: (865) 525-4333

Reviews and Comments


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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.

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