George Marek, MD, PHD
NPI 1578023537 · Gastroenterology Physician · Rochester, MN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Marek, MD, PHD is a Gastroenterology Physician provider in Rochester, MN (NPI 1578023537).
Provider details
- NPI number
- 1578023537
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 71133 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Omeprazole | 37 |
| Lactulose | 18 |
| Opium Tincture | 18 |
| Lipase/Protease/Amylasebrand: Creon | 15 |
| Naloxegol Oxalatebrand: Movantik | 14 |
| Rabeprazole Sodium | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,728 across 13 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1600 Sw Archer Rd Ste 4102Gainesville, FL 32610-3003Phone: (352) 265-0239Fax: (352) 265-1107
Registry dates
- Enumerated
- 2019-03-24
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is George Marek's NPI number?
- George Marek's National Provider Identifier (NPI) is 1578023537, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Marek's specialty?
- George Marek is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is George Marek located?
- George Marek's practice location on file with NPPES is 200 1st St Sw, Rochester, MN 55905-0001.
- What is George Marek's phone number?
- The practice phone number listed in the NPPES registry for George Marek is (507) 284-2511.
- Does George Marek accept Medicare?
- George Marek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Marek's NPI active?
- Yes — George Marek's NPI (1578023537) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.