DR. GEORGE WILLIAM MAREK III MD, PHD
NPI 1578023537
Internal Medicine - Gastroenterology in Rochester, MN
About Dr. George William Marek Iii Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GEORGE WILLIAM MAREK III MD, PHD (NPI 1578023537) is an individual gastroenterology provider in Rochester, Minnesota, licensed in Minnesota (71133) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and maintains a secondary practice location in Gainesville.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. George William Marek Iii Md, Phd is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic Hospital Rochester
Acute Care Hospitals · Rochester, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55905 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ROCHESTER, MN 55905
ROCHESTER, MN 55905
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is George Marek's NPI number?
The NPI number for George Marek is 1578023537. It was assigned to this individual provider in the NPPES registry on March 24, 2019.
Where is George Marek located?
George Marek practices at 200 1st St SW, Rochester, MN 55905. The listed phone number is (507) 284-2511.
What is George Marek's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is George Marek enrolled in Medicare?
Yes. George Marek is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does George Marek accept?
Health plans from Medica list George Marek as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is George Marek affiliated with any hospitals?
According to CMS data, George Marek is affiliated with Mayo Clinic Hospital Rochester.
When was this NPI record last updated?
The NPPES record for George Marek was last updated on July 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. George William Marek III, MD, PHD · NPI 1578023537
Gastroenterology physician in Rochester, Minnesota. Individual provider, active in the CMS NPPES registry since March 24, 2019.
## Identity
- **NPI:** 1578023537 (Entity type: Individual)
- **Enumerated:** March 24, 2019
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 71133 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 1ST ST SW, Rochester, MN 55905-0001
- **Phone:** (507) 284-2511
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** University Of Florida College Of Medicine, class of 2019
## Record status
- **NPPES last updated:** July 1, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1578023537) · Data from the CMS NPPES public registry.